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- Publications - (Clicking on the reprint icon  will take you to the publication reprint.)  
- An introduction to the cryopreservation of clonally propagated plants -(Book / Chapter)   Bettoni, J.C., Chen, K., Volk, G.M. 2024. An introduction to the cryopreservation of clonally propagated plants. In: Volk, G.M., Chen, K., editors. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/an-introduction-to-the-cryopreservation-of-clonally-propagated-plants/   
- Considerations when implementing shoot tip cryopreservation -(Book / Chapter)   Bettoni, J.C., Chen, K., Volk, G.M. 2024. Considerations when implementing shoot tip cryopreservation. Electronic Publication. In: Volk, G.M., Chen, K., editors. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/considerations-when-implementing-shoot-tip-cryopreservation/   
- An overview of shoot tip cryopreservation -(Book / Chapter)   Bettoni, J.C., Chen, K., Volk, G.M. 2024. An overview of shoot tip cryopreservation. Electronic Publication. In: Volk, G.M., Chen, K., editors. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/an-overview-of-shoot-tip-cryopreservation/   
- Application of biotechniques for in vitro virus and viroid elimination in pome fruit crops  -(Peer Reviewed Journal)   Bettoni, J.C., Wang, M., Li, J., Fan, X., Fazio, G., Hurtado-Gonzales, O.P., Volk, G.M., Wang, Q. 2024. Application of biotechniques for in vitro virus and viroid elimination in pome fruit crops. Phytopathology. https://doi.org/10.1094/PHYTO-07-23-0232-KC.   
- Direct measurement of rice (Oryza sativa) callus cell responses to common molecular cryoprotectants  -(Peer Reviewed Journal)   Samuels, F., Pearce, K.C., Soderlund, S., Stich, D.G., Bonnart, R.M., Volk, G.M., Levinger, N.E. 2023. Direct measurement of rice (Oryza sativa) callus cell responses to common molecular cryoprotectants. Cell Reports Physical Science. https://doi.org/10.1016/j.xcrp.2023.101469.   
- Tracking permeation of dimethyl sulfoxide (DMSO) in Mentha x piperita shoot tips using coherent Raman microscopy  -(Peer Reviewed Journal)   Kreckel, H.D., Samuels, F.M., Bonnart, R.M., Volk, G.M., Stich, D., Levinger, N.E. 2023. Tracking permeation of dimethyl sulfoxide (DMSO) in Mentha x piperita shoot tips using coherent Raman microscopy. Plants. 12(12). Article e2247. https://doi.org/10.3390/plants12122247.   
- Malus doumeri: The tropical apple species in Vietnam  -(Peer Reviewed Journal)   Hoai, T.T., Kien, N.V., Yen, D., Thuy, N.B., Chao, C.T., Volk, G.M. 2023. Malus doumeri: The tropical apple species in Vietnam. Acta Horticulturae. https://DOI.org/10.17660/ActaHortic.2023.1384.11.   
- Safeguarding plant genetic resources in the United States during global climate change  -(Peer Reviewed Journal)   Volk, G.M., Carver Jr, D.P., Irish, B.M., Marek, L., Frances, A.L., Greene, S.L., Khoury, C., Bamberg, J.B., Del Rio, A., Warburton, M.L., Bretting, P.K. 2023. Safeguarding plant genetic resources in the United States during global climate change. Crop Science. https://doi.org/10.1002/csc2.21003.   
- GRIN-U.org: Online portal for learning materials on plant genetic resources  -(Peer Reviewed Journal)   Byrne, P.F., Volk, G.M., Namuth-Covert, D., Chen, K., Kinard, G.R., Gu, L.M., Gardner, C., Mahama, A., Douglass, F., Cerimele, G., Gray, S., Zarestky, J., Morris, G. 2023. GRIN-U.org: Online portal for learning materials on plant genetic resources. Natural Sciences Education. 52(1). Article e20109. https://doi.org/10.1002/nse2.20109.   
- Progress on the molecular characterization of the USDA National Pear Collection  -(Peer Reviewed Journal)   Bassil, N.V., King, R., Nyberg, A.M., Zurn, J., Clare, S.J., Reinhold Aboosaie, L.A., Postman, J., Gilmore, B., Flores, G.N., Volk, G.M., Jenderek, M.M., Montanari, S., Chagne, D., Bus, V., Brewer, L., Dardick, C.D., Gottschalk, C.C., Durel, C., Denance, C. 2023. Progress on the molecular characterization of the USDA National Pear Collection. Acta Horticulturae. https://doi.org/10.17660/ActaHortic.2023.1384.36.   
- A global strategy for the conservation and use of citrus genetic resources  -(Book / Chapter)   Volk, G.M., Gmitter, F., Krueger, R. 2023. A global strategy for the conservation and use of citrus genetic resources. Bonn, Germany: Global Crop Diversity Trust. 78 p. https://doi.org/10.5281/zenodo.7757226.   
- Conserving citrus diversity: From Vavilov’s early explorations to genebanks around the world  -(Peer Reviewed Journal)   Volk, G.M., Gmitter, F., Krueger, R. 2023. Conserving citrus diversity: From Vavilov’s early explorations to genebanks around the world. Plants. 12(4). Article e814. https://doi.org/10.3390/plants12040814.   
- Importance of plants for mitigating and adapting to the effects of climate change -(Book / Chapter)   Volk, G.M., Byrne, P., Moreau, T. 2023. Importance of plants for mitigating and adapting to the effects of climate change. In: Volk, G.M., Moreau, T.L., Byrne, P.F., editors. Conserving and Using Climate-Ready Plant Collections. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/climatereadyplantcollections/chapter/importance-of-plants/   
- The need for plant genetic resource collections in a climate change context -(Book / Chapter)   Volk, G.M., Moreau, T. 2023. The need for plant genetic resource collections in a climate change context. In: Volk, G.M., Moreau, T.L., Byrne, P.F., editors. Conserving and Using Climate-Ready Plant Collections. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/climatereadyplantcollections/chapter/the-need-for-pgr-collections/   
- Climate change impacts management of genebanks and botanic gardens -(Book / Chapter)   Volk, G.M., Moreau, T. 2023. Climate change impacts management of genebanks and botanic gardens. In: Volk, G.M., Moreau, T.L., Byrne, P.F., editors. Conserving and Using Climate-Ready Plant Collections. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/climatereadyplantcollections/chapter/genebanks-and-botanic-gardens/   
- Climate adaptation planning for plant collections and conservation -(Book / Chapter)   Volk, G.M., Moreau, T. 2023. Climate adaptation planning for plant collections and conservation. In: Volk, G.M., Moreau, T.L., Byrne, P.F., editors. Conserving and Using Climate-Ready Plant Collections. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/climatereadyplantcollections/chapter/climate-adaptation-planning/   
- Climate change affects plant interactions with pollinators, pathogens and pests -(Book / Chapter)   Irish, B.M., Volk, G.M. 2023. Climate change affects plant interactions with pollinators, pathogens and pests. In: Volk, G.M., Moreau, T.L., Byrne, P.F., editors. Conserving and Using Climate-Ready Plant Collections. Fort Collins, CO: Colorado State University. Available: https://colostate.pressbooks.pub/climatereadyplantcollections/chapter/pollinators-pathogens-and-pests/.   
- Climate change impacts agricultural productivity and food security -(Book / Chapter)   Moreau, T., Denning, S., Byrne, P., Volk, G.M. 2023. Climate change impacts agricultural productivity and food security. In: Volk, G.M., Moreau, T.L., Byrne, P.F., editors. Conserving and Using Climate-Ready Plant Collections. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/climatereadyplantcollections/chapter/agricultural-productivity-and-food-security/   
- DNA profiling with the 20K apple SNP array reveals Malus domestica hybridization and admixture in M. sieversii, M. orientalis, and M. sylvestris genebank accessions  -(Peer Reviewed Journal)   Volk, G.M., Peace, C.P., Henk, A.D., Howard, N.P. 2022. DNA profiling with the 20K apple SNP array reveals Malus domestica hybridization and admixture in M. sieversii, M. orientalis, and M. sylvestris genebank accessions. Frontiers in Plant Science. 13. Article e1015658. https://doi.org/10.3389/fpls.2022.1015658.   
- GRIN-U.org: An online repository for learning materials on plant genetic resources -(Abstract Only)   Byrne, P.F., Namuth-Covert, D., Kinard, G.R., Gu, L.M., Chen, K., Volk, G.M. 2022. GRIN-U.org: An online repository for learning materials on plant genetic resources [abstract]. 2022 ASA-CSSA-SSSA International Annual Meeting. Paper No. 77-1.   
- Safeguarding and using fruit and vegetable biodiversity  -(Book / Chapter)   von Zonneveld, M., Volk, G.M., Dulloo, M.E., Kindt, R., Mayes, S., Quintero, M., Choudhury, D., Achigan-Dako, E.G., Guarino, L. 2023. Safeguarding and using fruit and vegetable biodiversity. In: von Braun, J., Afsana, K., Fresco, L.O., Hassan, M., editors. Science and Innovations for Food Systems Transformation. New York, NY: Springer Cham. p. 553-567. https://doi.org/10.1007/978-3-031-15703-5_30.   
- Visualizing PVS2 component permeation into Oryza sativa callus cells by coherent Raman scattering microscopy  -(Abstract Only)   Samuels, F.M., Stich, D.G., Bonnart, R.M., Volk, G.M., Levinger, N.E. 2022. Visualizing PVS2 component permeation into Oryza sativa callus cells by coherent Raman scattering microscopy [abstract]. Cryobiology. 109:38. https://doi.org/10.1016/j.cryobiol.2022.11.121.   
- What's in a name? The importance of identity in heirloom apple tree preservation  -(Peer Reviewed Journal)   Dunbar-Wallis, A., Volk, G.M., Johnson, A.M., Schuenemeyer, A., Bunker, J., Castro, D., Little-Siebold, T., Uhlmann, R., Sieger, L., Benscoter, D., Peace, C. 2022. What's in a name? The importance of identity in heirloom apple tree preservation. Plants, People, Planet. https://doi.org/10.1002/ppp3.10307.   
- Active-site seed storage management and maintenance in Ames, Iowa, a U.S. National Plant Germplasm System location -(Book / Chapter)   Douglass, F., Burke, L.A., Gardner, C., Volk, G.M. 2022. Active-site seed storage management and maintenance in Ames, Iowa, a U.S. National Plant Germplasm System location. In: Volk, G.M., editor. Fundamentals of Plant Genebanking. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/fundamentalsofplantgenebanking/chapter/seed-storage-management-ncrpis/   
- Safeguarding plant genetic resource collections for agriculture  -(Trade Journal)   Volk, G.M., Walters, C.T., Warburton, M.L., Bretting, P.K. 2022. Safeguarding plant genetic resource collections for agriculture. CSA News. 67(7):34-36. https://doi.org/10.1002/csan.20785.   
- A multi-modal analysis of Mentha x piperita shoot tip response to cryoprotective agents  -(Abstract Only)   Kreckel, H.D., Bonnart, R.M., Stich, D., Volk, G.M., Levinger, N.E. 2022. A multi-modal analysis of Mentha x piperita shoot tip response to cryoprotective agents [abstract]. Cryobiology. 109:14-15. https://doi.org/10.1016/j.cryobiol.2022.11.047.   
- Virus studies in the Geneva® apple rootstock breeding program -(Trade Journal)     
- Shoot tip cryotherapy for plant pathogen eradication  -(Peer Reviewed Journal)   Wang, M., Bi, W., Bettoni, J.C., Zhang, D., Volk, G.M., Wang, Q. 2022. Shoot tip cryotherapy for plant pathogen eradication. Plant Pathology. 71(6):1241-1254. https://doi.org/10.1111/ppa.13565.   
- Malus doumeri: The tropical apple species in Vietnam -(Abstract Only)     
- Micrografting: An old dog plays new tricks in plant obligate pathogens  -(Peer Reviewed Journal)   Wang, M., Bi, W., Ren, L., Ma, X., Zhang, D., Volk, G.M., Wang, Q., Zahng, A. 2022. Micrografting: An old dog plays new tricks in plant obligate pathogens. Plant Disease. https://doi.org/10.1094/PDIS-03-22-0475-FE.   
- Minimizing the deleterious effects of endophytes in plant shoot tip cryopreservation  -(Peer Reviewed Journal)   Henk, A.D., Bonnart, R.M., Araujo De Oliveira, A., Volk, G.M. 2022. Minimizing the deleterious effects of endophytes in plant shoot tip cryopreservation. Applications in Plant Sciences. Article e11489. https://doi.org/10.1002/aps3.11489.   
- The USDA National Plant Germplasm System apple collection within the context of global crop conservation strategies -(Peer Reviewed Journal)   Volk, G.M., Dempewolf, H., Bramel, P., Meakem, V.M., Gutierrez, B.L. 2022. The USDA National Plant Germplasm System apple collection within the context of global crop conservation strategies. Journal of American Pomological Society. 76(2):50-58.   
- Thermotherapy followed by shoot tip cryotherapy eradicates latent viruses and Apple hammerhead viroid from in vitro apple rootstocks  -(Peer Reviewed Journal)   Bettoni, J.C., Fazio, G., Carvalho Costa, L., Hurtado-Gonzales, O.P., Ah Rwahnih, M., Nedrow, A.K., Volk, G.M. 2022. Thermotherapy followed by shoot tip cryotherapy eradicates latent viruses and Apple hammerhead viroid from in vitro apple rootstocks. Plants. 11(5). Article e582. https://doi.org/10.3390/plants11050582.   
- Conservation and characterization of the USDA national pear collection -(Abstract Only)   Bassil, N.V., Reinhold Aboosaie, L.A., Zurn, J., Postman, J., Gilmore, B.S., Flores, G.N., Nyberg, A.M., King, R., Driskill, M., Olson, J.E., Volk, G.M., Jenderek, M.M., Montanari, S., Chagne, D., Bus, V., Brewer, L., Dardick, C.D., Gottschalk, C.C., Durel, C., Denance, C. 2022. Conservation and characterization of the USDA national pear collection. Acta Horticulturae.   
- Plant tissue culture media preparation -(Book / Chapter)   Bonnart, R.M., Chen, K., Volk, G.M. 2022. Plant tissue culture media preparation. In: Volk, G.M., Chen, K., editors. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/media/   
- Preparing plant vitrification solution 2 -(Book / Chapter)   Bonnart, R.M., Chen, K., Volk, G.M. 2022. Preparing plant vitrification solution 2. In: Volk, G.M., Chen, K., editors. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/pvs2/   
- Integrating genomic and phenomic approaches to support plant genetic resources conservation and use  -(Peer Reviewed Journal)   Volk, G.M., Byrne, P.F., Coyne, C.J., Flint Garcia, S.A., Reeves, P.A., Richards, C.M. 2021. Integrating genomic and phenomic approaches to support plant genetic resources conservation and use. Plants. 10(11). Article e2260. https://doi.org/10.3390/plants10112260.   
- Grapevine shoot tip cryopreservation and cryotherapy: Secure storage of disease-free plants  -(Peer Reviewed Journal)   Bettoni, J., Markovic, Z., Bi, W., Volk, G.M., Matsumoto, T., Wang, Q. 2021. Grapevine shoot tip cryopreservation and cryotherapy: Secure storage of disease-free plants. Plants. 10(10). Article e2190. https://doi.org/10.3390/plants10102190.   
- Conserving heirloom fruit trees: Introducing the RegisTREEs - new tools for cataloging fruit trees and orchards in North America -(Popular Publication)   Uhlmann, R., Schuenemeyer, A., Castro, D., Bunker, J., Volk, G.M., Bussey, D.J., Benscoter, D., Schuenemeyer, J., Cooper, J., Sieger, L., Dunbar-Wallis, A., Little-Siebold, T., Peace, C. 2021. Conserving heirloom fruit trees: Introducing the RegisTREEs - new tools for cataloging fruit trees and orchards in North America. Pomona. 54(4):25-31.   
- Localization of DMSO in Mentha x piperita shoot tips using CARS microscopy -(Abstract Only)     
- New learning materials for conservation and use of plant genetic resources -(Abstract Only)     
- Plant cryopreservation: Implementation and outreach  -(Peer Reviewed Journal)   Volk, G.M., Chen, K., Bonnart, R.M. 2022. Plant cryopreservation: Implementation and outreach. Acta Horticulturae. 1339:93-100. https://doi.org/10.17660/ActaHortic.2022.1339.13.   
- Safeguarding and using fruit and vegetable biodiversity -(Proceedings)   Van Zonneveld, M., Volk, G.M., Guarino, L., Mayes, S., Quintero, M., Choudhury, D., Delloo, E., Kindt, R. 2021. Safeguarding and using fruit and vegetable biodiversity. Food Systems Summit Brief, United Nations Food Systems Summit 2021 Scientific Group.   
- Mint shoot tip cryopreservation (droplet vitrification) -(Book / Chapter)   Volk, G.M., Hummer, K.E., Chen, K. 2021. Mint shoot tip cryopreservation (droplet vitrification). In: Volk, G.M., editor. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/mint-cryopreservation/   
- Reduced-temperature storage of temperate crops in tissue culture -(Book / Chapter)   Volk, G.M., Denoma, J., Hummer, K.E., Chen, K. 2021. Reduced-temperature storage of temperate crops in tissue culture. In: Volk, G.M., editor. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/reduced-temperature-storage-of-temperate-crops-in-tissue-culture/   
- Introduction of clean plants into tissue culture: Temperate crops -(Book / Chapter)   Volk, G.M., Denoma, J., Hummer, K.E., Chen, K. 2021. Introduction of clean plants into tissue culture: Temperate crops. In: Volk, G.M., editor. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. https://colostate.pressbooks.pub/clonalcryopreservation/chapter/introduction-of-plants-into-tissue-culture/   
- Strawberry shoot tip cryopreservation (droplet vitrification) -(Book / Chapter)   Chen, K., Volk, G.M., Hummer, K.E. 2021. Strawberry shoot tip cryopreservation (droplet vitrification). In: Volk, G.M., editor. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/strawberry-cryopreservation/   
- Grapevine shoot tip cryopreservation (droplet vitrification and V-Cryoplate) -(Book / Chapter)   Bettoni, J., Bonnart, R.M., Volk, G.M. 2020. Grapevine shoot tip cryopreservation (droplet vitrification and V-Cryoplate). In: Volk, G.M., editor. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/grapevine-shoot-tip-cryopreservation-droplet-vitrification-and-cryoplate/   
- Apple shoot tip cryopreservation -(Book / Chapter)   Bettoni, J., Bonnart, R.M., Volk, G.M. 2021. Apple shoot tip cryopreservation. In: Volk, G.M., editor. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/apple-shoot-tip-cryopreservation/   
- Global conservation strategies and the crop trust's work in support of a global system of ex situ conservation -(Abstract Only)     
- Non-uniform distribution of cryoprotecting agents in rice culture cells measured by CARS microscopy  -(Peer Reviewed Journal)   Samuels, F.M., Stich, D.G., Bonnart, R.M., Volk, G.M., Levinger, N.E. 2021. Non-uniform distribution of cryoprotecting agents in rice culture cells measured by CARS microscopy. Plants. 10(3):589. https://doi.org/10.3390/plants10030589.   
- Genetic fingerprinting identifies apple (Malus domestica Borkh.) fruit cultivars in historic orchards on public lands  -(Peer Reviewed Journal)   Volk, G.M., McCardle, K., Serin, J., Magby, J., Mazur, R. 2021. Genetic fingerprinting identifies apple (Malus domestica Borkh.) fruit cultivars in historic orchards on public lands. Genetic Resources and Crop Evolution. https://doi.org/10.1007/s10722-021-01175-8.   
- Apple genetic resources: Diversity and conservation -(Book / Chapter)   Volk, G.M., Bramel, P. 2021. Apple genetic resources: diversity and conservation. In: Korban, S.S., editor. The Apple Genome. Cham, Switzerland: Springer International Publishing. p. 33-45.   
- Botany, taxonomy, and origins of the apple -(Book / Chapter)   Volk, G.M., Cornille, A., Durel, C., Gutierrez, B.L. 2021. Botany, taxonomy, and origins of the apple. In: Korban, S.S., editor. The Apple Genome. Cham, Switzerland: Springer International Publishing. p. 19-32.   
- Methods for cryopreserving of date palm pollen  -(Book / Chapter)   Araujo De Oliveira, A., Ledo, A., Polek, M., Krueger, R., Shepherd, A.N., Volk, G.M. 2023. Methods for cryopreserving of date palm pollen. In: Rajasekharan, P., Rohini, M., editors. Pollen Cryopreservation Protocols. New York, NY: Humana. p.519-525. https://doi.org/10.1007/978-1-0716-2843-0_49.   
- Overview of the National Clonal Germplasm Repository in Davis, California -(Book / Chapter)   Volk, G.M., Preece, J.E. 2021. Overview of the National Clonal Germplasm Repository in Davis, California. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/introduction/   
- Kiwifruit collection -(Book / Chapter)   Sanchez, A., Volk, G.M., Balunek, E., Preece, J.E. 2021. Kiwifruit collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/kiwifruit/   
- Fig collection -(Book / Chapter)   Sanchez, A., Volk, G.M., Preece, J.E. 2021. Fig collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/figs/   
- Persimmon collection -(Book / Chapter)   Smith, J., Volk, G.M., Preece, J.E. 2021. Persimmon collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/persimmons/   
- Walnut collection -(Book / Chapter)   Smith, J., Volk, G.M., Preece, J.E. 2021. Walnut collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/walnuts/   
- Mulberry collection -(Book / Chapter)   Smith, J., Volk, G.M., Preece, J.E. 2021. Mulberry collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/mulberries/   
- Olive collection -(Book / Chapter)   Smith, J., Volk, G.M., Balunek, E., Preece, J.E. 2021. Olive collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/olives/   
- Prunus collection -(Book / Chapter)   DeBuse, C., Volk, G.M., Balunek, E., Preece, J.E. 2021. Prunus collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/prunus-collection/   
- Pomegranate collection -(Book / Chapter)   Moersfelder, J., Volk, G.M., Balunek, E., Preece, J.E. 2021. Pomegranate collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/pomegranates/   
- Grape collection -(Book / Chapter)   Prins, B., Volk, G.M., Preece, J.E. 2021. Grape collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/grapes/   
- Pistachio collection -(Book / Chapter)   Preece, J.E., Balunek, E., Volk, G.M. 2021. Pistachio collection. In: Volk, G.M., Preece, J.E., editors. Field tour of the USDA National Clonal Germplasm Repository for Tree Fruit, Nut Crops, and Grapes in Davis, California. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/davisrepositoryfieldtour/chapter/pistachios/   
- Expanding learning resources for plant genetic resource conservation and use -(Abstract Only)   Byrne, P., Volk, G.M., Bretting, P.K. 2020. Expanding learning resources for plant genetic resource conservation and use. ASA-CSSA-SSSA Annual Meeting Abstracts.   
- New learning materials for plant genetic resources conservation and use -(Abstract Only)   Byrne, P., Volk, G.M., Bretting, P.K. 2020. New learning materials for plant genetic resources conservation and use. National Association of Plant Breeders.   
- Genetic data inform Yosemite National Park orchard management guidelines  -(Peer Reviewed Journal)   Volk, G.M., Magby, J., Henk, A.D., Miller, S., Mazur, R. 2020. Genetic data inform Yosemite National Park orchard management guidelines. Plants, People, Planet. 3(2):142-154. https://doi.org/10.1002/ppp3.10152.   
- Optimization of in vitro germination and cryopreservation conditions for preserving date palm pollen in the USDA National Plant Germplasm System  -(Peer Reviewed Journal)   Araujo De Oliveira, A., Ledo, A., Polek, M., Krueger, R., Volk, G.M. 2021. Optimization of in vitro germination and cryopreservation conditions for preserving date palm pollen in the USDA National Plant Germplasm System. Plant Cell Tissue and Organ Culture. 144:223-232. https://doi.org/10.1007/s11240-020-01907-1.   
- A Story of ‘Fire and Ice’: Combining thermotherapy with cryotherapy for improved virus eradication - Case studies of Apple and Shallot  -(Abstract Only)   Wang, M-R., Hamborg, Z., Blystad, D., Volk, G.M., Wang, Q. 2020. A Story of ‘Fire and Ice’: Combining thermotherapy with cryotherapy for improved virus eradication - Case studies of Apple and Shallot. Cryobiology. 97:283. https://doi.org/10.1016/j.cryobiol.2020.10.132.   
- Considerations for large-scale implementation of dormant budwood cryopreservation  -(Peer Reviewed Journal)   Tanner, J.D., Chen, K.Y., Bonnart, R.M., Minas, I.S., Volk, G.M. 2021. Considerations for large-scale implementation of dormant budwood cryopreservation. Plant Cell Tissue and Organ Culture. 144:35-48. https://doi.org/10.1007/s11240-020-01884-5.   
- Genetic data improve management and use of apple genebank collections -(Trade Journal)   Volk, G.M., Howard, N.P. 2020. Genetic data improve management and use of apple genebank collections. Chronica Horticulturae. 60(3):23-27.   
- Challenges in implementing plant shoot tip cryopreservation technologies  -(Peer Reviewed Journal)   Bettoni, J.C., Bonnart, R.M., Volk, G.M. 2021. Challenges in implementing plant shoot tip cryopreservation technologies. Plant Cell Tissue and Organ Culture. 144:21-34. https://doi.org/10.1007/s11240-020-01846-x.   
- How can crops that are not grown from seeds be conserved in gene banks? -(Other)   Volk, G.M. 2020. How can crops that are not grown from seeds be conserved in gene banks? Crop Science Society of America Sustainable, Secure Food Blog. Available: https://sustainable-secure-food-blog.com/2020/09/22/how-can-crops-that-are-not-grown-from-seeds-be-conserved-in-gene-banks/#respond.   
- Introduction to crop wild relatives -(Book / Chapter)   Volk, G.M., Khoury, C., Greene, S., Byrne, P. 2020. Introduction to crop wild relatives. In: Volk, G.M., Byrne, P., editors. Crop Wild Relatives and their Use in Plant Breeding. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/cropwildrelatives/chapter/introduction-to-crop-wild-relatives/.   
- Crop wild relatives in genebanks -(Book / Chapter)   Volk, G.M., Richards, C., Walters, C., Dempewolf, H., Byrne, P. 2020. Crop wild relatives in genebanks. In: Volk, G.M., Byrne, P., editors. Crop Wild Relatives in Genebanks. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/cropwildrelatives/chapter/crop-wild-relatives-in-genebanks/.   
- Links to some published best practices for genebanking -(Book / Chapter)   Volk, G.M. 2020. Links to some published best practices for genebanking. In: Volk, G.M., Byrne, P., editors. Crop Wild Relatives in Genebanks. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/cropwildrelatives/chapter/published-best-practices/.   
- Case study: Coffee wild species and cultivars -(Book / Chapter)   Volk, G.M., Krishnan, S. 2020. Case study: Coffee wild species and cultivars. In: Volk, G.M., Byrne, P., editors. Crop Wild Relatives in Genebanks. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/cropwildrelatives/chapter/case-study-coffee-wild-species-and-cultivars/.   
- Citrus shoot tip cryopreservation -(Book / Chapter)   Volk, G.M., Krueger, R., Moreland, B., Bonnart, R., Shepherd, A. 2020. Citrus shoot tip cryopreservation. In: Volk, G.M., editors. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/citrus-cryopreservation/.   
- Citrus micrografting for regrowth after shoot tip cryopreservation -(Book / Chapter)   Volk, G.M., Bonnart, R., Shepherd, A. 2020. Citrus micrografting for regrowth after shoot tip cryopreservation. In: Volk, G.M., editors. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/citrus-micrografting/.   
- Prunus shoot tip cryopreservation -(Book / Chapter)   Volk, G.M., Bonnart, R. 2020. Prunus shoot tip cryopreservation. In: Volk, G.M., editors. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/prunus-cryopreservation/.   
- Cryopreservation of dormant apple buds -(Book / Chapter)   Volk, G.M., Jenderek, M., Chen, K. 2020. Cryopreservation of dormant apple buds. In: Volk, G.M., editors. Training in Plant Genetic Resources: Cryopreservation of Clonal Propagules. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/clonalcryopreservation/chapter/apple-dormant-bud-cryopreservation/.   
- The USDA plant introduction program -(Book / Chapter)   Williams, K., Volk, G.M. 2020. The USDA plant introduction program. In: Volk, G.M., Byrne, P., editors. Crop Wild Relatives in Genebanks. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/cropwildrelatives/chapter/usda-plant-introduction-program/.   
- From wild species to landraces and cultivars -(Book / Chapter)   Byrne, P., Richards, C., Volk, G.M. 2020. From wild species to landraces and cultivars. In: Volk, G.M., Byrne, P., editors. Crop Wild Relatives and their Use in Plant Breeding. Fort Collins, Colorado: Colorado State University. Available: https://colostate.pressbooks.pub/cropwildrelatives/chapter/from-wild-species-to-landraces-and-cultivars/.   
- Completion of a global strategy for the conservation and use of apple genetic resources -(Abstract Only)   Volk, G.M., Bramel, P.J. 2020. Completion of a global strategy for the conservation and use of apple genetic resources. 10th Rosaceae Genomics Conference. Virtual 2020.   
- Advances in cryopreservation of in vitro-derived propagules: Technologies and explant sources  -(Peer Reviewed Journal)   Wang, M., Lambardi, M., Engelmann, F., Pathirana, R., Panis, B., Volk, G.M., Wang, Q. 2020. Advances in cryopreservation of in vitro-derived propagules: Technologies and explant sources. Plant Cell Tissue and Organ Culture. https://doi.org/10.1007/s11240-020-01770-0.   
- Heritage apple cultivars grown in homesteads, nurseries and orchards in Wyoming -(Peer Reviewed Journal)   Magby, J., Volk, G.M., Miller, S. 2019. Heritage apple cultivars grown in homesteads, nurseries and orchards in Wyoming. Journal of American Pomological Society. 73(2):95-101. http://www.pubhort.org/aps/73/v73_n2_a2.htm.   
- Development, progress and future prospects in cryobiotechnology of Lilium spp  -(Peer Reviewed Journal)   Li, J., Zhang, X., Wang, M., Bi, W., Faisal, M., Teixeira Da Silva, J., Volk, G.M., Wang, Q. 2019. Development, progress and future prospects in cryobiotechnology of Lilium spp. Plant Methods. 15:125.   
- Plant genetic resources training materials deemed essential by international survey  -(Peer Reviewed Journal)   Volk, G.M., Bretting, P.K., Byrne, P.F. 2019. Plant genetic resources training materials deemed essential by international survey. Crop Science. 59:2308-2316. https://doi.org//10.2135/cropsci2019.05.0324.   
- A global strategy for the conservation and use of apple genetic resources  -(Other)   Bramel, P., Volk, G.M. 2019. A global strategy for the conservation and use of apple genetic resources. Scientific and Technical Review. https://doi.org/10.13140/RG.2.2.34072.34562.   
- Cryopreservation of grapevine shoot tips from in vitro plants using droplet vitrification and V cryo-plate techniques  -(Book / Chapter)   Bettoni, J.C., Pathirana, R., Bonnart, R.M., Shepherd, A.N., Volk, G.M. 2019. Cryopreservation of grapevine shoot tips from in vitro plants using droplet vitrification and V cryo-plate techniques. In: Faisal, M., Alatar, A., editors. Synthetic Seeds. Switzerland: Springer Nature. p. 469-482. https://doi.org//10.1007/978-3-030-24631-0_22.   
- Cryopreserving clonal crops: Increasing processing efficiency in genebanks -(Abstract Only)   Volk G. 2019. Cryopreserving clonal crops: increasing processing efficiency in genebanks. Cryobiology 91:157-158.   
- Successful cryopreservation and histological observations of Vitis shoot tips isolated from growth chamber source plants  -(Peer Reviewed Journal)   Bettoni, J.C., Bonnart, R.M., Shepherd, A.N., Kretzschmar, A.A., Volk, G.M. 2019. Successful cryopreservation and histological observations of Vitis shoot tips isolated from growth chamber source plants. Vitis. 58(2):71-78. https://doi.org/10.5073/vitis.2019.58.71-78.   
- Cryopreservation of 12 Vitis species using apical shoot tips derived from plants grown in vitro -(Peer Reviewed Journal)   Bettoni, J.C., Bonnart, R.M., Shepherd, A.N., Kretzschmar, A., Volk, G.M. 2019. Cryopreservation of 12 Vitis species using apical shoot tips derived from plants grown in vitro. HortScience. 54(6):976-981.   
- Cryopreservation of 12 Vitis species using apical shoot tips derived from plants grown in vitro  -(Peer Reviewed Journal)     
- Eradication of latent viruses from apple cultivar ‘Monalisa’ shoot tips using droplet-vitrification cryotherapy  -(Peer Reviewed Journal)   Bettoni, J., Souza, J.A., Volk, G.M., Costa, M., Nascimento Da Silva, F., Kretzschmar, A. 2019. Eradication of latent viruses from apple cultivar ‘Monalisa’ shoot tips using droplet-vitrification cryotherapy. Scientia Horticulturae. 250:12-18. https://doi.org/10.1016/j.scienta.2019.02.033.   
- Training in Plant Genetic Resource Management: A way forward -(Peer Reviewed Journal)     
- Cryobiotechnology: a double-edged sword for obligate plant pathogens  -(Peer Reviewed Journal)   Zhao, L., Wang, M., Li, J., Cui, Z., Volk, G.M., Wang, Q. 2019. Cryobiotechnology: a double-edged sword for obligate plant pathogens. Plant Disease. 103:1058-1067. https://doi.org/10.1094/PDIS-11-18-1989-FE.   
- Training in plant genetic resource management: A way forward  -(Peer Reviewed Journal)   Volk, G.M., Namuth-Covert, D., Bryne, P.F. 2019. Training in plant genetic resource management: A way forward. Crop Science. 59(3):853-857. https://doi.org/10.2135/cropsci2018.11.0689.   
- Development of practical and successful Vitis shoot tip cryopreservation protocols -(Abstract Only)   Volk G. 2019. Development of practical and successful Vitis shoot tip cryopreservation protocols. Cryobiology 91:194-195.   
- Modifications to a Vitis shoot tip cryopreservation procedure: Effect of shoot tip size and use of cryoplates -(Peer Reviewed Journal)   Bettoni, J.C., Bonnart, R.M., Shepherd, A.N., Kretzschmar, A.A., Volk, G.M. 2019. Modifications to a Vitis shoot tip cryopreservation procedure: Effect of shoot tip size and use of cryoplates. CryoLetters. 40(2):103-112.   
- Identification of historic homestead and orchard apple cultivars in Wyoming  -(Peer Reviewed Journal)   Magby, J., Volk, G.M., Henk, A.D., Miller, S. 2019. Identification of historic homestead and orchard apple cultivars in Wyoming. HortScience. 54(1):8-16. https://doi.org/10.21273/HORTSCI13436-18.   
- Cider apple diversity and genetics -(Abstract Only)   Peck, G., Volk, G.M., Gottschalk, C. 2018. Cider apple diversity and genetics. CiderCon 2019.   
- Cider apple diversity and genetics -(Abstract Only)     
- Educating the next generation of genebank workers -(Abstract Only)   Byrne, P., Volk, G.M., Bretting, P.K. 2019. Educating the next generation of genebank workers. Crop Science Society of America. 2018 ASA/CSSA Meeting.   
- Shoot tip cryotherapy for efficient eradication of grapevine leafroll-associated virus-3 from diseased grapevine in vitro plants  -(Peer Reviewed Journal)   Bi, W., Hao, X., Cui, Z., Pathirana, R., Volk, G.M., Wang, Q. 2018. Shoot tip cryotherapy for efficient eradication of grapevine leafroll-associated virus-3 from diseased grapevine in vitro plants. Annals of Applied Biology. 173(3):261-270. https://doi.org/10.1111/aab.12459.   
- Implementation of citrus shoot tip cryopreservation in the USDA-ARS national plant germplasm system  -(Peer Reviewed Journal)   Volk, G.M., Jenderek, M.M., Walters, C.T., Bonnart, R.M., Shepherd, A.N., Skogerboe, D.M., Hall, B.D., Moreland, B.L., Krueger, R., Polek, M. 2019. Implementation of citrus shoot tip cryopreservation in the USDA-ARS national plant germplasm system. Acta Horticulturae. 1234:329-334. https://doi.org/10.17660/ActaHortic.2019.1234.43.   
- Challenges in the development of a widely applicable method for sugarcane (Saccharum spp.) shoot tip cryopreservation  -(Peer Reviewed Journal)   Volk, G.M., Jenderek, M.M., Staats, E.R., Shepherd, A.N., Bonnart, R.M., Leado, A., Ayala Silva, T. 2019. Challenges in the development of a widely applicable method for sugarcane (Saccharum spp.) shoot tip cryopreservation. Acta Horticulturae. 1234:335-342. https://doi.org/10.17660/ActaHortic.2019.1234.44.   
- Successful cryopreservation of Vitis vinifera cv. ‘Chardonnay’ from both in vitro and growth chamber source plants  -(Peer Reviewed Journal)   Bettoni, J.C., Bonnart, R.M., Shepherd, A.N., Kretzschmar, A., Volk, G.M. 2019. Successful cryopreservation of Vitis vinifera cv. ‘Chardonnay’ from both in vitro and growth chamber source plants. Acta Horticulturae. 1234:211-218. https://doi.org/10.17660/ActaHortic.2019.1234.28.   
- Genetic diversity and domestication history in Pyrus -(Book / Chapter)   Volk, G.M., Cornille, A. 2019. Genetic diversity and domestication history in Pyrus. In Korban SS (ed.) "The Pear Genome". Springer. Switzerland. p. 51-62.   
- Virus infection reduces shoot proliferation of in vitro stock cultures and ability of cryopreserved shoot tips to regenerate into normal shoots in 'gala' apple (malus × domestica)  -(Peer Reviewed Journal)   Wang, M., Hao, X., Zhao, L., Cui, Z., Volk, G.M., Wang, Q. 2018. Virus infection reduces shoot proliferation of in vitro stock cultures and ability of cryopreserved shoot tips to regenerate into normal shoots in 'gala' apple (malus × domestica). Cryobiology. 84:52-58. https://doi.org/10.1016/j.cryobiol.2018.08.002.   
- Outcomes of an international workshop to develop training/educational programs for Plant Genetic Resources Management -(Abstract Only)   Volk G, Byrne P, Bretting P. 2018. Outcomes of an international workshop to develop training/educational programs for plant genetic resources management. American Soc. Horticultural Sci. Conference, July 31-Aug 3, 2018. https://ashs.confex.com/ashs/2018/meetingapp.cgi/Paper/28081cgi/Paper/28081.   
- Identification of Historic Homestead and Orchard Apple Cultivars in Wyoming -(Abstract Only)   Magby JT, Volk GM, Henk AD, Miller SL. 2018. Identification of historic homestead and orchard apple cultivars in Wyoming. American Soc. Horticultural Sci. Conference, July 31-Aug 3, 2018. https://ashs.confex.com/ashs/2018/meetingapp.cgi/Paper/29065   
- Droplet-vitrification cryopreservation of in vitro-grown shoot tips of grapevine (Vitis spp.)  -(Peer Reviewed Journal)   Bi, W., Hao, X., Cui, Z., Volk, G.M., Wang, Q. 2018. Droplet-vitrification cryopreservation of in vitro-grown shoot tips of grapevine (Vitis spp.). In Vitro Cellular and Developmental Biology - Plants. 54:590-599. https://doi.org/10.1007/s11627-018-9931-0.   
- Cryopreservation of jerusalem artichoke cultivars -(Abstract Only)   Volk, G.M., Wang, L. 2018. Cryopreservation of jerusalem artichoke cultivars. Cryobiology. https://doi.org/www.sciencedirect.com/science/article/pii/S0011224018301883.   
- Chloroplast sequence data differentiate Maleae, and specifically Pyrus, species in the USDA-ARS National Plant Germplasm System  -(Peer Reviewed Journal)   Volk, G.M., Henk, A.D., Richards, C.M., Bassil, N.V., Postman, J.D. 2018. Chloroplast sequence data differentiate Maleae, and specifically Pyrus, species in the USDA-ARS National Plant Germplasm System. Genetic Resources and Crop Evolution. 66(1):5-15. https://doi.org/10.1007/s10722-018-0691-9.   
- Successful cryopreservation of Vitis shoot tips: Novel pre-treatment combinations applied to nine species -(Peer Reviewed Journal)   Volk, G.M., Shepherd, A.N., Bonnart, R.M. 2018. Successful cryopreservation of Vitis shoot tips: Novel pre-treatment combinations applied to nine species. CryoLetters. 39(5):322-330.   
- Collaborative project to identify direct and distant pedigree relationships in apple -(Abstract Only)   Magby JT, Volk GM, Henk AD, Miller SL. 2018. Identification of historic homestead and orchard apple cultivars in Wyoming. American Soc. Horticultural Sci. Conference, July 31-Aug 3, 2018. https://ashs.confex.com/ashs/2018/meetingapp.cgi/Paper/29065   
- Identification of unknown apple cultivars demonstrates the impact of local breeding program on cultivar diversity -(Peer Reviewed Journal)   Gross, B.L., Martinez, M., Wedger, M.J., Volk, G.M., Hale, C. 2018. Identification of unknown apple cultivars demonstrates the impact of local breeding program on cultivar diversity. Genetic Resources and Crop Evolution. 65:1317-1327.   
- Combining thermotherapy with cryotherapy for efficient eradication of Apple stem grooving virus from infected in vitro-cultured apple shoots -(Peer Reviewed Journal)   Lei, Z., Wang, M., Cui, Z., Chen, L., Volk, G.M., Wang, Q. 2018. Combining thermotherapy with cryotherapy for efficient eradication of Apple stem grooving virus from infected in vitro-cultured apple shoots. Plant Disease. 102: 1574-1580.   
- Cryotherapy by encapsulation-dehydration is effective for in vitro eradication of latent viruses from ‘Marubakaido’ apple rootstock -(Peer Reviewed Journal)   Bettoni, J.C., Costa, M.D., Souza, J.A., Nickel, O., Volk, G.M., Da Silva, F.N., Kretzschmar, A.A. 2018. Cryotherapy by encapsulation-dehydration is effective for in vitro eradication of latent viruses from ‘Marubakaido’ apple rootstock. Journal of Biotechnology. 269:1-7.   
- Implementation of Citrus Shoot Tip Cryopreservation in the USDA-ARS National Plant Germplasm System -(Abstract Only)   Volk, G.M., Jenderek, M.M., Walters, C.T., Bonnart, R.M., Shepherd, A.N., Skogerboe, D.M., Hall, B.D., Moreland, B.L., Krueger, R., Polek, M. 2018. Implementation of Citrus Shoot Tip Cryopreservation in the USDA-ARS National Plant Germplasm System. Meeting Abstract. 20.   
- Challenges in the development of a widely applicable method for sugarcane (Saccharum spp.) shoot tip cryopreservation -(Abstract Only)   Volk, G.M., Jenderek, M.M., Staats, E.R., Shepherd, A.N., Bonnart, R.M., Ledo, A., Ayala Silva, T. 2018. Challenges in the development of a widely applicable method for sugarcane (Saccharum spp.) shoot tip cryopreservation. Meeting Abstract. 57.   
- The development of a droplet-vitrification method to conserve Vitis collections in the USDA-ARS National Plant Germplasm System and UDESC-CAV Santa Catarina State University in Brazil -(Abstract Only)   Bettoni JC, Bonnart R, Shepherd A, Kretzschmar AA, Volk GM. 2018. The development of a droplet-vitrification method to conserve Vitis collections in the USDA-ARS National Plant Germplasm System and UDESC-CAV Santa Catarina State University in Brazil. Third International Symposium on Plant Cryopreservation. CryoSymp 2018. 26-28 March 2018. Bangkok, Thailand. pg. 24.   
- Cryopreservation of apple (Malus spp.): development, progress and future prospects  -(Peer Reviewed Journal)   Wang, M., Chen, L., Liu, J., Teixeira Da Silva, J.A., Volk, G.M., Wang, Q. 2018. Cryopreservation of apple (Malus spp.): development, progress and future prospects. Plant Cell Reports. 37(5):689-709. https://doi.org/10.1007/s00299-018-2249-x.   
- Sustaining the future of plant breeding: The critical role of the USDA-ARS National Plant Germplasm System  -(Peer Reviewed Journal)   Byrne, P.F., Volk, G.M., Gardner, C.A., Gore, M.A., Simon, P.W., Smith, S. 2018. Sustaining the future of plant breeding: The critical role of the USDA-ARS National Plant Germplasm System. Crop Science. 58(2):451-468. https://doi.org/10.2135/cropsci2017.05.0303.   
- Germplasm morgue or gold mine? Enhancing the value of plant genetic resource collections for plant breeding -(Abstract Only)   Byrne, P., Volk, G.M., Gardner, C.A., Gore, M., Simon, P.W., Smith, S. 2017. Germplasm morgue or gold mine? Enhancing the value of plant genetic resource collections for plant breeding. National Association of Plant Breeders. Page 1.   
- Citrus genebank collections: International collaboration opportunities between the U.S. and Russia  -(Peer Reviewed Journal)   Volk, G.M., Samarina, L.K., Kulyan, R., Vyacheslav, G., Malyarovskaya, V., Ryndin, A., Polek, M., Krueger, R., Stover, E.W. 2017. Citrus genebank collections: International collaboration opportunities between the U.S. and Russia. Genetic Resources and Crop Evolution. 65:433-447. https://doi.org/10.1007/s10722-017-0543-z.   
- Ex situ conservation of germplasm collections from natural populations -(Book / Chapter)     
- Sampling wild species to conserve genetic diversity -(Book / Chapter)     
- Cryoprotectants and their components induce plasmolytic responses in sweet potato suspension cells -(Peer Reviewed Journal)   Volk, G.M., Caspersen, A.M. 2017. Cryoprotectants and their components induce plasmolytic responses in sweet potato suspension cells. In Vitro Cellular and Developmental Biology - Plants. 53:363-371.   
- Temperate tree fruits of North America: Malus Mill., Prunus L., Diospyros L., and Asimina Adans  -(Book / Chapter)   Volk, G.M. 2019. Temperate tree fruits of North America: Malus Mill., Prunus L., Diospyros L., and Asimina Adans. North American Crop Wild Relatives. 2:353-386. https://doi.org/10.1007/978-3-319-97121-6_11.   
- Ensuring the genetic diversity of apples -(Book / Chapter)   Volk, G.M. 2017. Ensuring the genetic diversity of apples. In: Evans, K.Achieving sustainable cultivation of apples. Burleigh Dodds Science Publishing,Cambridge, UK. p.3-21.   
- Changes in transcript expression patterns as a result of cryoprotectant treatment and liquid nitrogen exposure in Arabidopsis shoot tips -(Peer Reviewed Journal)   Gross, B.L., Henk, A.D., Bonnart, R.M., Volk, G.M. 2016. Changes in transcript expression patterns as a result of cryoprotectant treatment and liquid nitrogen exposure in Arabidopsis shoot tips. Plant Cell Reports. 36:459-470. doi:10.1007/s00299-016-2095-7.   
- Improved droplet-vitrification and histological studies of cryopreserved shoot tips of cultivated Jerusalem artichoke genotypes -(Peer Reviewed Journal)   Zhang, J., Han, L., Lu, X., Volk, G.M., Xin, X., Yin, G., He, J., Wang, L., Chen, X. 2016. Improved droplet-vitrification and histological studies of cryopreserved shoot tips of cultivated Jerusalem artichoke genotypes. Plant Cell Tissue and Organ Culture. 128:327-334.   
- Probabilistic viability calculations for cryopreserving vegetatively propagated collections in genebanks -(Peer Reviewed Journal)   Volk, G.M., Henk, A.D., Jenderek, M.M., Richards, C.M. 2016. Probabilistic viability calculations for cryopreserving vegetatively propagated collections in genebanks. Genetic Resources and Crop Evolution. doi:10.1007/S10722-016-0460-6.   
- Citrus cyopreservation: viability of diverse taxa and histological observations -(Peer Reviewed Journal)   Volk, G.M., Bonnart, R.M., Shepherd, A.N., Yin, Z., Lee, R.F., Polek, M., Krueger, R. 2016. Citrus cyopreservation: viability of diverse taxa and histological observations. Plant Cell Tissue and Organ Culture. doi:10.1007/211240-016-1112-4.   
- Seeds capture the diversity of genetic resource collections of Malus sieversii maintained in an orchard -(Peer Reviewed Journal)   Volk, G.M., Henk, A.D., Forsline, P.L., Szewc-McFadden, A.K., Fazio, G., Aldwinckle, H., Richards, C.M. 2016. Seeds capture the diversity of genetic resource collections of Malus sieversii maintained in an orchard. Genetic Resources and Crop Evolution. doi:10.1007/s10722-016-0450-8.   
- The value of citrus genebanking -(Trade Journal)   Volk, G.M., Lee, R.F., Krueger, R. 2016. The value of citrus genebanking. Citrograph. 7(4):42-44.   
- The potential for citrus cryotherapy -(Trade Journal)     
- Historic American apple cultivars: Identification and availability -(Peer Reviewed Journal)   Volk, G.M., Henk, A.D. 2016. Historic American apple cultivars: Identification and availability. Journal of the American Society for Horticultural Science. 141(3):292-301.   
- Prioritization of Malus accessions for collection cryopreservation at the USDA-ARS National Center for Genetic Resources Preservation  -(Peer Reviewed Journal)   Volk, G.M., Jenderek, M.M., Chao, C.T. 2017. Prioritization of Malus accessions for collection cryopreservation at the USDA-ARS National Center for Genetic Resources Preservation. Acta Horticulturae. 1172:267-272 doi: 10.17660/ActaHortic.2017.1172.51.   
- A strategy to conserve worldwide apple genetic resources: Survey results  -(Peer Reviewed Journal)   Volk, G.M., Bramel, P. 2017. A strategy to conserve worldwide apple genetic resources: Survey results. Acta Horticulturae. 1172:99-106 doi: 10.17660/ActaHortic.2017.1172.18.   
- Recovery patterns, histological observations and genetic integrity in Malus shoot tips cryopreserved using droplet vitrification and encapsulation-dehydration procedures -(Peer Reviewed Journal)   Li, B., Feng, C., Hu, L., Wang, M., Volk, G.M., Wang, Q. 2015. Recovery patterns, histological observations and genetic integrity in Malus shoot tips cryopreserved using droplet vitrification and encapsulation-dehydration procedures. Journal of Biotechnology. 214:182-191.   
- Genetic diversity of Malus cultivars and wild relatives in the Chinese National Repository of Apple Germplasm Resources  -(Peer Reviewed Journal)   Gao, Y., Liu, F., Wang, K., Wang, D., Gong, X., Liu, L., Richards, C.M., Henk, A.D., Volk, G.M. 2015. Genetic diversity of Malus cultivars and wild relatives in the Chinese National Repository of Apple Germplasm Resources. Tree Genetics and Genomes. 11:106. doi:10.1007/s11295-015-0913-7.   
- Identification and conservation of apple genetic diversity -(Abstract Only)   Volk, G.M. 2015. Identification and conservation of apple genetic diversity. National Association for Plant Breeders, Pullman, WA. July 28-30, 2015. Pg.21.   
- Relationship between humanity and plant natural resources – in the context of food and agriculture -(Proceedings)   Hummer, K.E., Volk, G.M., Preece, J.E. 2016. Relationship between humanity and plant natural resources – in the context of food and agriculture. Foreign Agriculture Organization Proceedings. Humanity and Plant Genetic Resources: Fruits through the Ages. p. 274-308.   
- Chloroplast heterogeneity and historical admixture within the genus Malus -(Peer Reviewed Journal)   Volk, G.M., Henk, A.D., Baldo, A.M., Fazio, G., Chao, C.T., Richards, C.M. 2015. Chloroplast heterogeneity and historical admixture within the genus Malus. American Journal of Botany. 102(7):1198-1208. DOI: 10.3732/ajb.1500095.   
- Identification of a highly successful cryopreservation method (droplet-vitrification) for petunia -(Peer Reviewed Journal)   Zhang, J., Huang, B., Zhang, X., Volk, G.M., Xin, X., Yin, G., He, J., Lu, X., Zhou, Y., Chen, X. 2015. Identification of a highly successful cryopreservation method (droplet-vitrification) for petunia. In Vitro Cellular and Developmental Biology - Plants. 51:445-451.   
- Conservation of the USDA-ARS National Plant Germplasm System Apple Collection using dormant bud cryopreservation -(Abstract Only)   Volk, G.M., Jenderek, M.M., Chao, C.T. 2015. Conservation of the USDA-ARS National Plant Germplasm System Apple Collection using dormant bud cryopreservation [abstract]. XIV Eucarpia Fruit Breeding and Genetics Symposium. Available: http://www.eucarpiafruit2015.org/wp-content/uploads/2014/06/03-poster-list.pdf.   
- Cryopreservation of in vitro-grown shoot tips of Chinese medicinal plant Atractylodes macrocephala Koidz. using a droplet-vitrification method -(Peer Reviewed Journal)   Zhang, J., Huang, B., Lu, X., Volk, G.M., Xin, X., Yin, G., He, J., Chen, X. 2015. Cryopreservation of in vitro-grown shoot tips of Chinese medicinal plant Atractylodes macrocephala Koidz. using a droplet-vitrification method. CryoLetters. 36(3):195-204.   
- Widespread applications of citrus cryopreservation -(Trade Journal)   Volk, G.M. 2015. Widespread applications of citrus cryopreservation. Citrograph. 6(2):42-44.   
- The vulnerability of US apple (Malus) genetic resources  -(Peer Reviewed Journal)   Volk, G.M., Chao, C.T., Norelli, J.L., Brown, S.K., Fazio, G., Peace, C., McFerson, J., Zhong, G., Bretting, P.K. 2015. The vulnerability of US apple (Malus) genetic resources. Genetic Resources and Crop Evolution. 62(5):765-794. doi:10.1007/s10722-014-0194-2.   
- Development of a strategy to conserve worldwide apple genetic resources -(Abstract Only)   Volk, G.M., Hummer, K.E., Bramel, P. 2015. Development of a strategy to conserve worldwide apple genetic resources [abstract]. XIV Eucarpia Fruit Breeding and Genetics Symposium. Available: http://www.eucarpiafruit2015.org/wp-content/uploads/2014/07/eucarpia2k15programme.pdf.   
- Cryopreservation of citrus for long-term conservation -(Peer Reviewed Journal)   Volk, G.M., Bonnart, R.M., Shepherd, A., Krueger, R., Lee, R.F. 2015. Cryopreservation of citrus for long-term conservation. Acta Horticulturae. 1065:187-191.   
- Genetic diversity in Malus × domestica (Rosaceae) through time in response to domestication -(Peer Reviewed Journal)   Gross, B., Henk, A.D., Richards, C.M., Fazio, G., Volk, G.M. 2014. Genetic diversity in Malus × domestica (Rosaceae) through time in response to domestication. American Journal of Botany. 101(10):1770-1779. DOI: 10.3732/ajb.1400297.   
- Cryopreservation of Populus trichocarpa and Salix using dormant buds with recovery by grafting or direct rooting -(Peer Reviewed Journal)   Bonnart, R.M., Waddell, J.W., Haiby, K., Widrlechner, M., Volk, G.M. 2014. Cryopreservation of Populus trichocarpa and Salix using dormant buds with recovery by grafting or direct rooting. CryoLetters. 35(6):507-515.   
- Genetic relationships between wild progenitor pear (Pyrus L.) species and local cultivars native to Georgia, South Caucasus -(Peer Reviewed Journal)   Asanidze, Z., Akhalkatsi, M., Henk, A.D., Richards, C.M., Volk, G.M. 2014. Genetic relationships between wild progenitor pear (Pyrus L.) species and local cultivars native to Georgia, South Caucasus. Flora. 209(9):504-512. DOI: 10.1016/j.flora.2014.06.013.   
- Tree and root architecture of Malus sieversii seedlings for rootstock breeding -(Peer Reviewed Journal)   Fazio, G., Chao, C.T., Forsline, P., Richards, C.M., Volk, G.M. 2014. Tree and root architecture of Malus sieversii seedlings for rootstock breeding. Acta Horticulturae. 1058:585-594.   
- Application of genetic and spatial analyses to identify collection priorities for wild Malus species -(Abstract Only)   Volk, G.M., Richards, C.M., Henk, A.D., Baldo, A.M., Fazio, G., Chao, C.T. 2014. Application of genetic and spatial analyses to identify collection priorities for wild Malus species [abstract]. 7th International Rosaceae Genomics Conference. p. 84.   
- A global conservation strategy for apple -(Abstract Only)   Volk, G.M., Chao, C.T., Hummer, K.E. 2014. A global conservation strategy for apple [abstract]. 7th International Rosaceae Genomics Conference. p. 28.   
- An efficient, widely applicable cryopreservation of Lilium shoottips by droplet vitrification -(Peer Reviewed Journal)   Yin, Z., Bi, W., Chen, L., Zhao, B., Volk, G.M., Wang, Q. 2014. An efficient, widely applicable cryopreservation of Lilium shoot tips by droplet vitrification. Acta Physiologiae Plantarum. 36(7):1683-1692. DOI: 10.1007/s11738-014-1543-7.   
- Potential applications of cryogenic technologies to plant genetic improvement and pathogen eradication -(Peer Reviewed Journal)   Wang, B., Wang, R., Cui, Z., Li, J., Bi, W., Li, B., Ozudogru, E., Volk, G.M., Wang, Q. 2014. Potential applications of cryogenic technologies to plant genetic improvement and pathogen eradication. Biotechnology Advances. 32(3):583-595. DOI: 10.1016/j.biotechadv.2014.03.003.   
- Developing cryotherapy to eliminate graft-transmissible pathogens in citrus -(Trade Journal)   Lee, R.F., Volk, G.M., Hartung, J.S. 2014. Developing cryotherapy to eliminate graf-transmissible pathogens in citrus. Citrograph. 5(3):50-57.   
- Strategies for improved efficiency when implementing plant vitrification techniques -(Peer Reviewed Journal)   Volk, G.M., Shepherd, A., Bonnart, R.M. 2014. Strategies for improved efficiency when implementing plant vitrification techniques. Acta Horticulturae. 1039:85-89.   
- Plant shoot tip response to treatment with plant vitrification solution 2 -(Peer Reviewed Journal)   Volk, G.M., Henk, A.D., Bonnart, R.M., Shepherd, A., Gross, B.L. 2014. Plant shoot tip response to treatment with plant vitrification solution 2. Acta Horticulturae. 1039:81-84.   
- Somatic embryogenesis and organogenesis from cryopreserved shoot tips of Lilium Oriental hybrid ‘Siberia’ -(Peer Reviewed Journal)   Yin, Z., Chen, L., Bi, W., Volk, G.M., Wang, Q. 2014. Somatic embryogenesis and organogenesis from cryopreserved shoot tips of Lilium Oriental hybrid ‘Siberia’. Acta Horticulturae. 1039:193-200.   
- Gene expression in arabidopsis shoot tips after liquid nitrogen exposure -(Abstract Only)   Volk, G.M., Henk, A.D., Bonnart, R.M., Gross, B. 2013. Gene expression in arabidopsis shoot tips after liquid nitrogen exposure. Meeting Abstract. 2nd International Society for Horticultural Science Meeting. p.17.   
- Cryopreservation of pecan pollen for long-term storage -(Abstract Only)   Volk, G.M., Walters, C.T., Waddell, J., Grauke, L.J. 2013. Cryopreservation of pecan pollen for long-term storage. Meeting Abstract. Second International Symposium on Plant Cryopreservation, p.106.   
- "Intermediate" seed storage physiology: populus as a natural model system -(Abstract Only)   Hill, L.M., Haiby, K., Volk, G.M., Walters, C.T. 2013. "Intermediate" seed storage physiology: populus as a natural model system. International Society for Horticultural Science Meeting. p.88.   
- Cryopreservation of citrus in the USDA-ARS national plant germplasm system collection -(Abstract Only)   Bonnart, R.M., Shepherd, A., Lee, R.F., Krueger, R., Volk, G.M. 2013. Cryopreservation of citrus in the USDA-ARS national plant germplasm system collection. Meeting Abstract. 2nd International Symposium on Plant Cryopreservation. p.62.   
- Cryopreservation of vitis shoot tips from diverse species -(Abstract Only)   Shepherd, A., Bonnart, R.M., Volk, G.M. 2013. Cryopreservation of vitis shoot tips from diverse species. Meeting Abstract. Second International Symposium on Plant Cryopreservation, p.103.   
- Shoot regeneration and embryogenesis in lily shoot tips cryopreserved by droplet vitrification -(Abstract Only)   Yin, Z.F., Chen, L., Bi, W., Volk, G.M., Wang, Q. 2013. Shoot regeneration and embryogenesis in lily shoot tips cryopreserved by droplet vitrification. International Society for Horticultural Science Meeting. p.55.   
- Characterization of Libyan olive, olea europaea L., cultivars using morpholigical data -(Abstract Only)   Abdul, S., Volk, G.M., Richards, C.M., Hughes, H. 2013. Characterization of Libyan olive, olea europaea L., cultivars using morpholigical data. American Society for Horticultural Science Meeting, Paper No.15849.   
- Pecan pollen:  cryopreservation for long-term storage -(Abstract Only)   Volk, G.M., Walters, C.T., Waddell, J.W., Grauke, L.J. 2013. Pecan pollen:  cryopreservation for long-term storage. Program for the International Symposium on Pecans and Other Carya in Indigenous & Managed Systems. p.26.   
- Diversity captured in the USDA-ARS National Plant Germplasm System apple core collection -(Peer Reviewed Journal)   Gross, B., Volk, G.M., Richards, C.M., Henk, A.D., Forsline, P., Szewc-Mcfadden, A.K., Fazio, G., Chao, C.T. 2013. Diversity captured in the USDA-ARS National Plant Germplasm System apple core collection. Journal of the American Society for Horticultural Science. 138(5):375-381.   
- Malus sieversii: a diverse Central Asian apple species in the USDA-ARS National Plant Germplasm System -(Peer Reviewed Journal)   Volk, G.M., Henk, A.D., Richards, C.M., Forsline, P.L., Chao, C.T. 2013. Malus sieversii: a diverse Central Asian apple species in the USDA-ARS National Plant Germplasm System. HortScience. 48(12):1440-1444.   
- Development of a global conservation strategy for citrus genetic resources  -(Peer Reviewed Journal)   Roose, M. L., Gmitter F. G., Lee, R.F., Hummer, K.E., Machado, M., Ashmore, S., Deng, X., Ancillo, G., Vives, M.C., Volk, G.M., Kahn, T.L., Luro, F. 2015. Development of a global conservation strategy for citrus genetic resources. Acta Horticulture Proceedings. 1065:75-83.   
- Potential use of apple crop wild relatives in breeding programs -(Abstract Only)   Volk, G.M. 2013. Potential use of apple crop wild relatives in breeding programs. Meeting Abstract. Plant and Animal Genome XXI, San Diego CA, Jan 12-16, 2013.   
- Genome-wide survey of genetic diversity of apple using genotyping-by-sequencing -(Abstract Only)   Gardner, K., Schwaninger, H.R., Dann, S., Baldo, A.M., Chao, C.T., Fazio, G., Volk, G.M., Richards, C.M., Zhong, G., Myles, S. 2013. Genome-wide survey of genetic diversity of apple using genotyping-by-sequencing [abstract]. Annual International Plant & Animal Genome Conference. W248.   
- The ASHS outstanding fruit cultivar award: a 25 year retrospective -(Peer Reviewed Journal)   Volk, G.M., Olmstead, J.W., Finn, C.E., Janick, J. 2013. The ASHS outstanding fruit cultivar award: a 25 year retrospective. HortScience. 48(1):4-12.   
- Genetic diversity of wild European and Mediterranean pear species -(Abstract Only)   Volk, G.M., Richards, C.M., Henk, A.D., Bassil, N.V., Postman, J.D. 2012. Genetic diversity of wild European and Mediterranean pear species (abstract). 6th Rosaceous Genomics Conference (RGC6). September 30 - October 4, 2012, Trento, Italy. p. 130-131.   
- The USDA-ARS National Plant Germplasm System Malus collection: diversity of cultivars and wild species -(Abstract Only)   Volk, G.M., Richards, C.M., Gross, B.L., Fazio, G., Chao, C.T. 2012. The USDA-ARS National Plant Germplasm System Malus collection: diversity of cultivars and wild species (abstract).  6th Rosaceous Genomics Conference (RGC6), September 30 - October 4, 2012, Trento, Italy.  p.131.   
- Cryopreservation of citrus for long-term conservation -(Abstract Only)   Volk, G.M., Bonnart, R.M., Shepherd, A., Krueger, R., Lee, R.F. 2012. Cryopreservation of citrus for long-term conservation. XII International Citrus Congress,  November 18 - 23, 2012, Valencia , Spain. Meeting Abstract. Paper No. S01O02.   
- Total phenolic levels in diverse garlics (Allium sativum L.) -(Trade Journal)   Volk, G.M., Caspersen, A.M., Stern, D. 2012. Total phenolic levels in diverse garlics (Allium sativum L.). Garlic Press. 51: 10-10.   
- Genetic variation and distribution of Pacific crabapple -(Peer Reviewed Journal)   Routson, K.J., Volk, G.M., Richards, C.M., Smith, S.E., Nabhan, G.P., De Echeverria, V.W. 2012. Genetic variation and distribution of Pacific crabapple. Journal of the American Society for Horticultural Science. 137(5):325-332.   
- Identification of “duplicate” accessions within the USDA-ARS National Plant Germplasm System malus collection -(Peer Reviewed Journal)   Gross, B.L., Volk, G.M., Richards, C.M., Forsline, P.L., Fazio, G., Chao, C.T. 2012. Identification of “duplicate” accessions within the USDA-ARS National Plant Germplasm System malus collection. Journal of the American Society for Horticultural Science. 137(5):333-342.   
- Use of cryotherapy to eradicate pathogens from horticultural crops -(Abstract Only)   Volk, G.M. 2012. Use of cryotherapy to eradicate pathogens from horticultural crops. Meeting Abstract. Available: http://ashs.org/abstracts/m/abstracts12/ abstract_id_12207.html.   
- Cryopreservation of Salix sp. dormant winter buds -(Abstract Only)   Jenderek, M.M., Ambruzs, B.D., Holman, G.E., Volk, G.M., Ellis, D.D., Widrlechner, M.P., Carstens, J.D. 2012. Cryopreservation of Salix sp. dormant winter buds. American Society of Horticulture Science Meeting. Available: http://ashs.org/abstracts/m/abstracts12/abstract_id_11414.html.   
- Conservation of US citrus collections using cryopreservation -(Abstract Only)   Volk, G.M., Bonnart, R.M., Krueger, R., Lee, R.F. 2012. Conservation of US citrus collections using cryopreservation. Meeting Abstract. Available: http://ashs.org/abstracts/m/abstracts12/abstract_id_10287.html.   
- Identification of interspecific hybrids among domesticated apple and its wild relatives -(Peer Reviewed Journal)   Gross, B.L., Henk, A.D., Forsline, P.L., Richards, C.M., Volk, G.M. 2012. Identification of interspecific hybrids among domesticated apple and its wild relatives. Tree Genetics and Genomes. 8(6):1223-1235. DOI: 10.1007/s11295-012-0509-4.   
- Uniform standards for genome databases in forest and fruit trees -(Peer Reviewed Journal)   Wegrzyn, J.L., Main, D., Figueroa, B., Choi, M., Neale, D.B., Jung, S., Stanton, M., Zheng, P., Ficklin, S., Cho, I., Peace, C., Evans, K., Volk, G.M., Oraguzie, N., Chen, C., Gmitter, F.G., Abbott, A.G. 2012. Uniform standards for genome databases in forest and fruit trees. Tree Genetics and Genomes. 8:549-557.   
- Interspecific hybridization among domesticated apple and its wild relatives -(Abstract Only)   Gross, B.L., Henk, A.D., Forsline, P.L., Richards, C.M., Volk, G.M. 2012. Interspecific hybridization among domesticated apple and its wild relatives. Meeting Abstract. Available: https://pag.confex.com/pag/xx/webprogram/Paper3193.html.   
- Citrus conservation at the National Center for Genetic Resources Preservation -(Trade Journal)   Volk, G.M. 2011. Citrus conservation at the National Center for Genetic Resources Preservation. Citrograph. 2(7):42-43.   
- Cryopreservation of Citrus shoot tips using micrografting for recovery -(Peer Reviewed Journal)   Volk, G.M., Bonnart, R.M., Krueger, R., Lee, R.F. 2012. Cryopreservation of Citrus shoot tips using micrografting for recovery. CryoLetters. 33(6):418-426.   
- Population structure and conservation of wild Pyrus communis -(Abstract Only)   Volk, G.M., Richards, C.M., Cruz, V.V., Bassil, N.V., Postman, J.D. 2011. Population structure and conservation of wild Pyrus communis [meeting abstract]. In: Proceedings of American Society for Horticultural Science Annual Conference, September 25-28, 2011, Waikoloa, Hawaii. Available: http://ashs.confex com/ashs/2011/ webprogram/Paper7477.html.   
- Application of functional genomics to plant cryopreservation -(Abstract Only)   Volk, G.M., Henk, A.D., Gross, B.L. 2011. Application of functional genomics to plant cryopreservation [meeting abstract]. In: Proceedings of Cryo 2011: 48th Annual Meeting of the Society for Cyrobiology. July 24-27, 2011, Corvallis, Oregon. p. 63.   
- Chapter 25: Collecting pollen for genetic resources conservation -(Book / Chapter)   Volk, G.M. 2011. Chapter 25: Collecting pollen for genetic resources conservation. In: Guarino, L., Ramanatha Rao, V., Goldberg, E., editors. Collecting Plant Genetic Diversity: Technical Guidelines. 2011 Update. Rome, Italy: Bioversity International. Available: http://cropgenebank.sgrp.cgiar.org/index.php?option=com_content&view=article&id=654   
- Integration of georeferencing, habitat, sampling, and genetic data for documentation of wild plant genetic resources -(Peer Reviewed Journal)   Volk, G.M., Richards, C.M. 2011. Integration of georeferencing, habitat, sampling, and genetic data for documentation of wild plant genetic resources. HortScience. 46(11): 1446-1449.   
- Strategies for improved fruit crop cyropreservation -(Abstract Only)   Volk, G.M. 2011. Strategies for improved fruit crop cyropreservation [meeting abstract]. In: Proceedings of The First International Symposium on Cyropreservation of Horticultural Crops in China, June 28-30, 2011, Yangling, Shaanxi, China. p 43.   
- "Intermediate" seed storage physiology: populus as a natural model system -(Abstract Only)   Walters, C.T., Hill, L.M., Volk, G.M., Haiby, K. 2011. "Intermediate" seed storage physiology: populus as a natural model system. Meeting Abstract. International Society for Seed Science, Bahia, Brazil Apr 10-15, 2011. pp. 280.   
- Horticultural value of wild genetic resources: introduction to the workshop -(Peer Reviewed Journal)   Volk, G.M., Richards, C.M. 2011. Horticultural value of wild genetic resources: introduction to the workshop. HortScience. 46(11): 1436-1437.   
- Genetic variation in historical and modern apple cultivars compared to wild relatives -(Abstract Only)   Gross, B.L., Volk, G.M., Richards, C.M., Forsline, P.L. 2011. Genetic variation in historical and modern apple cultivars compared to wild relatives [meeting abstract]. In: Proceedings of the International Pland and Animal Genome XIX Conference, January 15-19, 2011, San Diego, California. p. 150.   
- Diversity and Domestication of Apples -(Abstract Only)   Volk, G.M., Richards, C.M., Forsline, P.L. 2010. Diversity and Domestication of Apples. Meeting Abstract. 5th International Rosaceae Genomics Conference, November 14-17, 2010. South Africa. pp. O51.   
- Duplication in the Domestica Apple Collection within the USDA-ARS National Plant Germplasm System in Geneva, New York -(Abstract Only)   Volk, G.M., Gross, B.L., Richards, C.M., Szwec-Mcfadden, A., Forsline, P.L., Fazio, G. 2010. Duplication in the Domestica Apple Collection within the USDA-ARS National Plant Germplasm System in Geneva, New York. Meeting Abstract. 5th International Rosaceae Genomics Conference, November 14-17, 2010. South Africa. pp. P53.   
- Standardized Phenotyping: A coordinated effort for Malus, Pyrus, Prunus and Fragaria -(Abstract Only)   Volk, G.M., Peace, C., Gasic, K., Bassil, N.V., Main, D. 2010. Standardized Phenotyping: A coordinated effort for Malus, Pyrus, Prunus and Fragaria. Meeting Abstract. 5th International Rosaceae Genomics Conference, November 14-17, 2010. South Africa. pp. O53.   
- Phylogenetic relationships among Maloideae species -(Government Publication)   Volk, G.M., Richards, C.M., Baldo, A.M. 2010. Phylogenetic relationships among Maloideae species. Meeting Abstract. 5th International Rosaceae Genomics Conference, November 14-17, 2010. South Africa. pp. O52.   
- Cryopreservation and Cryotherapy of Citrus Cultivars -(Abstract Only)   Volk, G.M., Krueger, R., Lee, R.F. 2010. Cryopreservation and Cryotherapy of Citrus Cultivars. Meeting Abstract National Citrus Research Coordination Symposium, Denver, Colorado, June 16-18, 2010.   
- Modeling demographics and genetics in ex situ collections during seed storage and regeneration -(Peer Reviewed Journal)   Richards, C.M., Lockwood, D.R., Volk, G.M., Walters, C.T. 2010. Modeling demographics and genetics in ex situ collections during seed storage and regeneration. Crop Science. 50:2440-2447.   
- Water-triacylglycerol interactions affect oil body structure and seed viability -(Abstract Only)   Walters, C.T., Crane, J., Volk, G.M., Ballesteros, D., Hill, L.M., Miller, A.L., Wiesneberger, L., Yoshinaga, A., Eira, M., Gardner, C.A., Zee, F.T., Coonrod, D. 2010. Water-triacylglycerol interactions affect oil body structure and seed viability [abstract]. Frontiers in Water Biophysics. p. 138-139.   
- Standardized plant disease evaluations will enhance resistance gene discovery -(Peer Reviewed Journal)   Postman, J.D., Volk, G.M., Aldwinckle, H. 2010. Standardized plant disease evaluations will enhance resistance gene discovery. HortScience. 45(9):1317-1320.   
- Standardized phenotyping: advantages to horticulture, introduction to the workshop -(Peer Reviewed Journal)   Bassil, N.V., Volk, G.M. 2010. Standardized Phenotyping: Advantages to Horticulture, Introduction to the Workshop. HortScience.  45(9):1306.   
- Diversity in wild apple species of Chinese origin -(Abstract Only)   Volk, G.M., Henk, A.D., Richards, C.M., Baldo, A.M., Forsline, P.L. 2010. Diversity in wild apple species of Chinese origin. Meeting Abstract. American Society for Horticultural Science annual conference, Palm Desert, CA  August 2-5, 2010.   
- Advantages for the use of standardized phenotyping in databases -(Peer Reviewed Journal)   Volk, G.M. 2010. Advantages for the use of standardized phenotyping in databases. HortScience 45:1310-1313.   
- Apple Diversity -(Book / Chapter)     
- Increased efficiency using the encapsulation-dehydration cryopreservation technique -(Peer Reviewed Journal)   Bonnart, R.M., Volk, G.M. 2010. Increased efficiency using the encapsulation-dehydration cryopreservation technique. CryoLetters. 31:95-100.   
- Gene expression in response to cryoprotectant and liquid nitrogen exposure in Arabidopsis shoot tips -(Peer Reviewed Journal)   Volk, G.M., Henk, A.D., Chhandak, B. 2011. Gene expression in response to cryoprotectant and liquid nitrogen exposure in Arabidopsis shoot tips. Acta Horticulturae. 908: 55-66.   
-  Apple Germplasm -(Book / Chapter)     
- A comprehensive approach toward conserving Malus germplasm -(Peer Reviewed Journal)   Volk, G.M., Richards, C.M., Forsline, P.L. 2010. A comprehensive approach toward conserving Malus germplasm. Acta Horticulturae. 859:177-182.   
- New Challenges for Data Managment in Genebanks -(Peer Reviewed Journal)   Richards, C.M., Volk, G.M. 2010. New Challenges for Data Managment in Genebanks. Acta Horticulturae. 859:333-336.   
- Diversity and the role of genebanks in the age of genomics -(Abstract Only)   Richards, C.M. and Volk, G.M. 2009. Diversity and the role of genebanks in the age of genomics. Molecular Markers in Horticulture Symposium. July 29-August 1, 2009 Corvallis, OR. pp. 39.  Meeting Abstract.   
- A Comprehensive Approach Toward Conserving Malus Germplasm -(Abstract Only)   Volk, G.M., Richards, C.M., Forsline, P.L. 2009. A comprehensive approach toward conserving Malus germplasm. Molecular Markers in Horticulture Symposium. July 29-August 1, 2009 Corvallis, OR. pp. 7.  Meeting Abstract.   
- Advantages For The Use Of Standardized Phenotyping In The National Plant Germplasm System -(Abstract Only)   Volk, G.M. 2009. Advantages For The Use Of Standardized Phenotyping In The National Plant Germplasm System. Meeting Abstract. HortScience 44:976   
- Capturing The Diversity Of Wild Malus Orientalis From Georgia, Armenia, Russia And Turkey -(Peer Reviewed Journal)   Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A.A., Reeves, P.A., Forsline, P.L., Aldwinckle, H.S. 2009. Capturing The Diversity Of Wild Malus Orientalis From Georgia, Armenia, Russia And Turkey. Journal of the American Society for Horticultural Science. 134:453-459.   
- Diversity and the Role of Genebanks in the Age of Genomics -(Abstract Only)   Richards, C.M., Volk, G.M. 2009. Diversity and the Role of Genebanks in the Age of Genomics. Meeting Abstract. Molecular Markers in Horticulture, ISHS, Covalis OR July 30-August 1, 2009. Abstract OP36 pg.39   
- Application of functional genomics and proteomics to plant cryopreservation -(Peer Reviewed Journal)   Volk, G.M. 2010. Application of functional genomics and proteomics to plant cryopreservation. Current Genomics. 11:24-29.   
- Phenotypic Characteristics Of Ten Garlic Cultivars Grown At Different North American Locations -(Peer Reviewed Journal)   Volk, G.M., Stern, D. 2009. Phenotypic Characteristics Of Ten Garlic Cultivars Grown At Different North American Locations. HortScience. 44:1238-1247.   
- Annonaceae seeds: Desiccation tolerant with unusual physiologies -(Abstract Only)   Volk, G.M., Bonnart, R.M., Walters, C.T. 2009. Annonaceae seeds: Desiccation tolerant with unusual physiologies. Seed Technologists Newsletter. 83 (2):18-19. Association of Official Seed Analysts and Society for Commercial Seed Technologists. May 29-June 4, 2009. Fort Collins, Colorado. Meeting Abstract.   
- Survival of cryogenically-stored dormant apple buds: A 20 year assessment -(Abstract Only)   Walters, C.T., Volk, G.M., Towill, L., Forsline, P.L. 2009. Survival of cryogenically-stored dormant apple buds: A 20 year assessment. I International Symposium on Cryopreservation in Horticultural Species, April 5-8, 2009. Leuven, Belgium. pp. 25. Meeting abstract.   
- Standardized Plant Disease Evaluations will Enhance Resistance Gene Discovery -(Proceedings)   Postman, J.D., Aldwinckle, H., Volk, G.M. 2009. Standardized Plant Disease Evaluations will Enhance Resistance Gene Discovery. Meeting Proceedings. HortScience 44:975.   
- Long-term survival of cryopreserved germplasm: contributing factors and assessments from 30 year old experiments -(Peer Reviewed Journal)   Walters, C.T., Volk, G.M., Koster, K.L., Stanwood, P.C., Towill, L.E. 2011. Long-term survival of cryopreserved germplasm: contributing factors and assessments from 30 year old experiments. Acta Horticulturae. 908: 113-120.   
- Identification of historic apple trees in the Southwestern United States and implications for conservation -(Peer Reviewed Journal)   Routson, K., Reilley, A., Henk, A.D., Volk, G.M. 2009. Identification of historic apple trees in the Southwestern United States and implications for conservation. HortScience 44:589-594.   
- Cryopreservation Of Dormant Buds From Diverse Fraxinus Species -(Peer Reviewed Journal)   Volk, G.M., Bonnart, R.M., Waddell, J.W., Widrlechner, M.P. 2009. Cryopreservation Of Dormant Buds From Diverse Fraxinus Species. CryoLetters. 30:262-267.   
-  Population Structure and History in Developing Core Sets in Wild Germplasm -(Abstract Only)   Richards, C.M., Volk, G.M., Reeves, P.A. 2009.  Population Structure and History in Developing Core Sets in Wild Germplasm. Plant and Animal Genome Conference Proceedings. Volume W008. January 10-14, 2009 San Diego California   
- Resistance Gene Analogs in Six Genera of Rosaceae: A Family-wide Classification -(Abstract Only)   Baldo, A.M., Volk, G.M., Henk, A.D., Iezzoni, A., Olmstead, J.W., Aldwinckle, H.S., Weber, C., Samuelian, S., Malnoy, M. 2009. Resistance Gene Analogs in Six Genera of Rosaceae: A Family-wide Classification. Plant & Animal Genome XVII Conference. Annual Conference. January 10-14, 2009. San Diego, CA. pp.182. Meeting Abstract.   
- Variation in low temperature exotherms of pecan cultivar dormant twigs -(Peer Reviewed Journal)   Volk, G.M., Waddell, J.W., Towill, L., Grauke, L.J. 2009. Variation in low temperature exotherms of pecan cultivar dormant twigs. HortScience. 44:317-321.   
- Selection of stratified core sets representing wild apple (Malus sieversii) -(Peer Reviewed Journal)   Richards, C.M., Volk, G.M., Reeves, P.A., Reilley, A., Henk, A.D., Forsline, P.L., Aldwinckle, H. 2009. Selection of stratified core sets representing wild apple (Malus sieversii). Journal of the American Society for Horticultural Science.  134:228-235.   
- Novel diversity identified in a wild apple population from Kyrgyz Republic -(Peer Reviewed Journal)   Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Miller, D.D., Forsline, P.L. 2009. Novel diversity identified in a wild apple population from Kyrgyz Republic. HortScience 44:516-519.   
- Population Structure And History In Developing Core Sets In Wild Germplasm. -(Abstract Only)   Richards, C.M., Volk, G.M., and P.A. Reeves. 2009. Population Structure and history in developing core sets in wild germplasm. Plant & Animal Genome XVII Conference. Annual Conference. January 10-14, 2009. San Diego, CA. pp. W008. Meeting Abstract.   
- Gene expression in response to cryoprotectant and liquid nitrogen exposure in Arabidopsis shoot tips -(Abstract Only)   Volk, G.M., Henk, A.D., Chhandak, B. Gene expression in response to cryoprotectant and liquid nitrogen exposure in Arabidopsis shoot tips. I International Symposium on Cryopreservation in Horticultural Species, April 5-8, 2009. Leuven, Belgium. pp. 24. Meeting abstract.   
- Genetic diversity and population structure in Malus sieversii, a wild progenitor species of domesticated apple. -(Peer Reviewed Journal)   Richards C.M., G. Volk, A.A. Reilley, A.D. Henk, D. Lockwood, P.A. Reeves, and P.L. Forsline. 2009. Genetic diversity and population structure in Malus sieversii, a wild progenitor species of domesticated apple. Tree Genetics and Genomics 5:339-347.   
- Diversity of wild Malus germplasm available in the USDA-ARS National Plant Germplasm System -(Abstract Only)   Volk, G.M., C.M. Richards, Aldwinckle, H.2008. Diversity of wild Malus germplasm available in the USDA-ARS National Plant Germplasm System. American Society for Horticultural Science. Annual Conference. July 21-24, 2008. Orlando, FL. 43:1136. Meeting Abstract.   
- Regional specificity of genetically diverse garlic varieties -(Abstract Only)   Volk, G.M. Rosen, C., Allan, D., Ocallaghan, A., Zandstra, J., Stern, D. 2008. Regional specificity of genetically diverse garlic varieties. American Society for Horticultural Science. Annual Conference. July 21-24, 2008. Orlando, FL. 43:1109-1110. Meeting Abstract.   
- Expansion of the USDA-ARS Germplasm Resources Information Network (GRIN) database to accommodate molecular data   -(Abstract Only)   Volk, G.M., Richards C.M., Bohning M.A., Sinnott Q.P. 2008. Expansion of the USDA-ARS Germplasm Resources Information Network (GRIN) database to accommodate molecular data. American Society for Horticultural Science. Annual Conference. July 21-24. Orlando, Florida 43:1205-1206. Meeting Abstract.   
- Genebanks in the post-genomic age: emerging roles and anticipated uses -(Peer Reviewed Journal)   Walters, C.T., Volk, G.M., Richards, C.M. 2008. Genebanks in the post-genomic age: emerging roles and anticipated uses. Biodiversity Issues 9:68-71.   
- Availability of genotypic data for USDA-ARS National Plant Germplasm System accessions using the Genetic Resources Information Network (GRIN) database -(Peer Reviewed Journal)   Volk, G.M., Richards, C.M. 2008. Availability of genotypic data for USDA-ARS National Plant Germplasm System accessions using the Genetic Resources Information Network (GRIN) database. HortScience 43:1365-1366.   
- Resistance Gene Analogs in Rosaceae: Family-wide Classification Including Raspberry, Cherry, and Wild Apples -(Proceedings)   Baldo, A.M., Volk, G.M., Iezzoni, A., Olmstead, J., Aldwinckle, H., Weber, C., Samuelian, S., Malnoy, M. 2008. Resistance Gene Analogs in Rosaceae: Family-wide Classification Including Raspberry, Cherry, and Wild Apples. Abstract. International Rosaceae Genomics Conference. March 16 - 19, 2008. Pucon, Chile. p. 43.   
- Assessment of the genetic diversity and disease resistance of wild Malus orientalis seedlings from Turkey and Southern Russia   -(Abstract Only)   Volk, G.M., C.M. Richards P. Forsline and H. Aldwinckle. 2008. Assessment of the genetic diversity and disease resistance of wild Malus orientalis  seedlings from Turkey and Southern Russia. Rosaceae Genomics Conference. Annual Conference. March 16-19, 2008. Pucon, Chile. pp. 85. Meeting Abstract.   
- Genetic diversity and disease resistance of wild Malus orientalis from Turkey and southern Russia -(Peer Reviewed Journal)   Volk, G.M., Richards, C.M., Reilley, A., Henk, A.D., Reeves, P.A., Forsline, P.L., Aldwinckle, H. 2008. Genetic diversity and disease resistance of wild Malus orientalis from Turkey and southern Russia. Journal of the American Society for Horticultural Science 133:383-389.   
- Genetic diversity of wild Malus orientalis -(Abstract Only)   Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Reeves, P.A., Forsline, P.L. 2007. Genetic diversity of wild Malus orientalis. Plant & Animal Genome XVI Conference. Annual Conference. January 12-16, 2008. San Diego, CA. pp. 137. Meeting Abstract.   
- Resistance Gene Analogs in Cherries (Prunus spp.) -(Abstract Only)   Baldo, A.M., Volk, G.M., Olmstead, J., Iezzoni, A. 2008. Resistance Gene Analogs in Cherries (Prunus spp.). Abstract. Plant and Animal Genome Conference January 12-16, 2008. San Diego, CA. p. 236.   
- Progress in evaluating Malus sieversii for Disease-Resistance and Horticultural Traits -(Proceedings)   Fazio, G., Forsline, P.L., Aldwinckle, H., Volk, G.M., Richards, C.M., Janisiewicz, W.J. 2009. Progress in evaluating Malus sieversii for Disease-Resistance and Horticultural Traits. ISHS 2009. Acta Hort. 814:59-66.   
- High viability of dormant Malus buds after 10 years of storage in liquid nitrogen vapor -(Peer Reviewed Journal)   Volk, G.M., Waddell, J.W., Bonnart, R.M., Towill, L.E., Ellis, D.D., Luffman, M. 2008. High viability of dormant Malus buds after 10 years of storage in liquid nitrogen vapor. CryoLetters 29:89-94.   
- Genetic Diversity of the Malus sieversii Collection in the USDA-ARS National Plant Germplasm System -(Abstract Only)   Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Forsline, P.L. 2007. Genetic Diversity of the Malus sieversii Collection in the USDA-ARS National Plant Germplasm System. Meeting Abstract HortScience. July 16-19, 2007, Scottsdale, Arazona. 44:895.   
- Gene Expression patterns in cryogenically stored Arabidopsis thaliana shoot tips -(Abstract Only)   Basu, C., Volk, G.M., Henk, A.D. 2007. Gene Expression patterns in cryogenically stored Arabidopsis thaliana shoot tips. Meeting Abstract for the 5th Canadian Plant Genomics Workshop. July 30,-August 2, 2007, Vancouver, BC, Canada pp. 56.   
- Shoot tip structural and biophysical responses to plant vitrification solution 2 (PVS2) exposure -(Abstract Only)   Volk, G.M., Caspersen, A.M., Walters, C.T. 2007. Shoot tip structural and biophysical responses to plant vitrification solution 2 (PVS2) exposure. Meeting abstract for the 44th Annual Meeting of the Society for Cryobiology. July 28 - August 01, 2007, Lake Louise, Canada. pp. 45.   
- Hydration of Cuphea seeds containing crystallized triacylglycerols -(Peer Reviewed Journal)   Volk, G.M., Crane, J., Caspersen, A.M., Kovach, D.A., Gardner, C.A., Walters, C.T. 2007. Hydration of Cuphea seeds containing crystallized triacylglycerols. Functional Plant Biology 34:360-367.   
- CRYOPRESERVATION OF ARABIDOPSIS THALIANA SHOOT TIPS. -(Peer Reviewed Journal)   Towill, L.E., R. Bonnart and G.M. Volk. 2006. Cryopreservation of Arabidopsis thaliana shoot tips. CryoLetters 27:353-360.   
- Genetic diversity assessment of wild Malus sieversii populations in Kazakhstan -(Abstract Only)   Volk, G.M., C.M. Richards, A. Henk, A. Reilley and P. Forsline. 2007. Genetic diversity assessment of wild Malus sieversii populations in Kazakhstan. Meeting Abstract for the Plant and Animal Genome Conference. January 13-18, 2007, San Diego, California. pp. 133.   
- PLASMOLYSIS and recovery of different cell types in cryoprotected shoot tips of MENTHA X piperita -(Peer Reviewed Journal)   Volk, G.M., Caspersen, A.M. 2007. Plasmolysis and recovery of different cell types in cryoprotected shoot tips of mentha x piperita. Protoplasma 231:215-226.   
- GENETIC DIVERSITY OF GARLIC -(Other)   Volk, G.M. 2006. Genetic diversity of garlic. Meeting Abstract. Hudson Valley Garlic Festival, September 23, 2006, Albany, NY.     
- DIFFERENTIAL GENE EXPRESSION OCCURS DURING PROCESSING FOR AND RECOVERY FROM CRYOPRESERVATION IN ARABIDOPSIS THALIANA SHOOT TIPS -(Abstract Only)   Basu, C., Volk, G.M., Bennett, A.A. 2006. Differential gene expression occurs during processing for and recovery from cryopreservation in arabidopsis thaliana shoot tips. American Society of Plant Biologists. August 5-9, 2006, Boston, Massachusetts. Meeting Abstract.   
- PROBABILISTIC MODELS FOR COLLECTING GENETIC DIVERSITY: COMPARISONS, CAVEATS AND LIMITATIONS -(Peer Reviewed Journal)   Lockwood, D., Richards, C.M., Volk, G.M. Probabilistic models for collecting genetic diversity: comparisons, caveats and limitations. Crop Science 47:859-866.   
- CALCIUM CHANNELS INVOLVED IN CALCIUM OXALATE CRYSTAL FORMATION -(Abstract Only)   Volk G.M. 2006. Calcium channels involved in calcium oxalate crystal formation. Meeting Abstract. International Symposium in Memory of Vincent R. Franceschi, June 9-10, 2006, Pullman, Washington. p. 21.   
- TRIACYLGLYCEROL PHASE AND SEED STORAGE BEHAVIOR -(Abstract Only)   Walters, C.T., Crane, J., Volk, G.M. 2006. Triacylglycerol phase and seed storage behavior. 17th International Symposium on Plant Lipids. July 16-21, 2006, East Lansing, Michigan. p. 67.  Meeting Abstract.   
- IMPLEMENTATION OF GARLIC CRYOPRESERVATION TECHNIQUES IN THE NATIONAL PLANT GERMPLASM SYSTEM -(Peer Reviewed Journal)   Ellis, D.D., D. Skogerboe, C. Andre, B. Hellier and G.M. Volk. 2006. Implementation of garlic cryopreservation techniques in the National Plant Germplasm System. CryoLetters 27:99-106.     
- MASSIVE CELLULAR DISRUPTION OCCURS DURING EARLY IMBIBITION OF CUPHEA SEEDS CONTAINING CRYSTALLIZED TRIACYLGLYCEROLS -(Peer Reviewed Journal)   Volk, G.M., J. Crane, A.M. Caspersen, L.M. Hill, C.A. Gardner and C. Walters. 2006. Massive cellular disruption occurs during early imbibition of Cuphea seeds containing crystallized triacylglycerols. Planta 224:1415-1426.   
- GENETIC DIVERSITY OF WILD PYRUS COMMUNIS L. -(Abstract Only)   Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Bassil, N.V., Postman, J.D. 2006. Genetic diversity of wild pyrus communis l. American Society of Horticulture Science Meeting. July 26-29, 2006, New Orleans, Louisiana. 41: 1035. Meeting Abstract.   
- DIVERSITY AND CHARACTERIZATION IN USDA MALUS AND TETRAPLOID CHERRY GERMPLASM IN GENEVA, NY -(Abstract Only)   Forsline, P.L., Aldwinckle, H., Iezzoni, A., Volk, G.M. 2006. Diversity and characterization in usda malus and tetraploid cherry germplasm in geneva, ny. Meeting Abstract. 3rd International Rosaceae Genomics Conference. Pg. 74.   
- CHARACTERIZATION OF WILD MALUS POPULATIONS USING GENOTYPIC AND PHENOTYPIC TRAITS  -(Abstract Only)   Volk, G.M., Richards, C.M., Forsline, P.L. 2006. Characterization of wild malus populations using genotypic and phenotypic traits. Meeting Abstract. 3rd International Rosaceae Genomics Conference. Pg. 34.   
- CHARACTERIZATION OF WILD MALUS POPULATIONS USING GENOTYPIC AND PHENOTYPIC TRAITS  -(Abstract Only)   Volk, G.M., C.M. Richards and P.L. Forsline. 2005. Characterization of wild malus populations using genotypic and phenotypic traits. 3rd International Rosaceae Genomics Conference. March 19-22, 2006, Napier, New Zealand. p. 34. Meeting Abstract.   
- SURVIVAL OF MINT SHOOT TIPS AFTER EXPOSURE TO CRYOPROTECTANT SOLUTIONS COMPONENTS -(Peer Reviewed Journal)   Volk, G.M., J.L. Harris and K.E. Rotindo. 2006. Survival of mint shoot tips after exposure to cryoprotectant solutions components. Cryobiology 52:305-308.   
- WILD PLANT SAMPLING STRATEGIES: THE ROLES OF ECOLOGY AND EVOLUTION -(Review Article)   Lockwood, D.R., C.M. Richards and G.M. Volk. 2007. Wild plant sampling strategies: the roles of ecology and evolution. Plant Breeding Reviews 29:285-313.   
- PRESERVATION METHODS FOR JERUSALEM ARTICHOKE CULTIVARS. -(Peer Reviewed Journal)   Volk, G.M. and K.M. Richards. 2006. Preservation methods for Jerusalem artichoke cultivars. HortScience 41(1):80-83.   
- DIVERSITY OF WILD PYRUS COMMUNIS BASED ON MICROSATELLITE ANALYSES -(Peer Reviewed Journal)   Volk, G.M., Richards, C.M., Henk, A.D., Reilley, A., Bassil, N.V., Postman, J.D. 2006. Diversity of wild pyrus communis based on microsatellite analyses. Journal of the American Society for Horticultural Science. Vol. 131:408-417.   
- USDA-CSREES-NRI PROJECTS DEVELOPING GENOMIC RESOURCES FOR THE ROSACEAE (MALUS) -(Abstract Only)   Norelli, J.L., Korban, S., Volk, G.M., Zeng, Z., Aldwinckle, H., Bassett, C.L., Beever, J., Farrell, R., Gasic, K., Richards, C.M. 2006. USDA-CSREES-NRI projects developing genomic resources for the rosaceae (malus). Meeting Proceedings of the Plant and Animal Genome XIV, January 13-18, 2006, San Diego, CA. p. 37.   
- PATTERNS OF MOLECULAR AND QUANTITATIVE TRAIT VARIATION IN MALUS SIEVERSII FROM KAZAKHSTAN -(Abstract Only)   Richards, C.M., Henk, A.D., Reilley, A., Forsline, P.L., Volk, G.M. 2006. Patterns of molecular and quantitative trait variation in Malus sieversii from kazakhstan. Meeting Proceedings of the Plant and Animal Genome XIV, January 13-18, 2006, San Diego, CA.   
- PLANT VITRIFICATION SOLUTION 2 (PVS2) LOWERS WATER CONTENT AND ALTERS FREEZING BEHAVIOR IN SHOOT TIPS DURING CRYOPROTECTION -(Peer Reviewed Journal)   Volk, G.M. and C. Walters. 2006. Plant vitrification solution 2 lowers water content and alters freezing behavior in shoot tips during cryoprotection. Cryobiology 52:48-61.   
- GENETICALLY SIMILAR GARLIC VARIETIES -(Popular Publication)   Volk, G.M. 2005. Genetically similar garlic varieties. The Garlic Press 45:7.   
- ULTRASTRUCTURAL CHANGES IN MINT MERISTEMS DURING THE CRYOPRESERVATION PROCESS -(Abstract Only)   Volk, G.M., Caspersen, A.M. Ultrastructural changes in mint meristems during the cryopreservation process. In: Symposium Series Meristems, June 2-5, 2005, Ames, Iowa. p. 21.    
- CRYOPRESERVATION OF 12 ALLIUM SATIVUM (GARLIC) ACCESSIONS: A COMPARISON OF PLANT VITRIFICATION SOLUTIONS (PVS2) AND PVS3 -(Abstract Only)   Ellis, D.D., D.M. Skogerboe, C.G. Andre, B.C. Hellier, and G.M. Volk, 2005. Cryopreservation of 12 allium sativum (garlic) accessions: a comparison of plant vitrification solutions (pvs2) and pvs3. In Vitro Cellular and Developmental Biology - Plants. June 5-7, 2005, Baltimore, Maryland. p. 11-12. Meeting Abstract.   
- CRYOPRESERVATION OF ARABIDOPSIS THALIANA SHOOT TIPS. -(Abstract Only)   Towill, L.E., Volk, G.M. 2005. Cryopreservation of arabidopsis thaliana shoot tips [abstract]. Hortscience. 40(4):1067    
- GENETIC DIVERSITY OF GARLIC -(Proceedings)   Stern, D., Volk, G.M. 2005. Genetic diversity of garlic. Symposium Proceedings. Mid-Atlantic Vegetable Conference, Hershey Pennsylvania, Feb 03, 2005.   
- EX SITU CONSERVATION OF VEGETATIVELY-PROPAGATED SPECIES: DEVELOPMENT OF A SEED-BASED CORE COLLECTION FOR MALUS SIEVERSII -(Peer Reviewed Journal)   Volk, G.M., A. Reilley, A.D. Henk, P.L. Forsline, H.S. Aldwinckle, and C.M. Richards. 2005. Ex situ conservation of vegetatively-propagated species: development of a seed-based core collection for Malus sieversii. Journal of the American Society of Horticultural Science. 130:203-210.   
- THE CRYOPRESERVATION PROCESS INDUCES PLASMOLYSIS IN MINT SHOOT TIPS -(Abstract Only)   Volk, G.M., Caspersen, A.M. 2004. The cryopreservation process induces plasmolysis in mint shoot tips. Plasmodesmata 2004. August 17-21, 2004.Monterey, CA. p.118.   
- SOYBEAN CANOPY GAS EXCHANGE REATES: EFFECTS OF LIGHTING -(Peer Reviewed Journal)   Wheeler, R., C. Kenneth, G.M. Volk, C. Mackowiak, N.C. Yorio, and J.C. Sager. Soybean canopy gas exchange rates: Effects of lighting. Ecological Engineering 16(3):209-214.   
- HOW MANY GARLICS ARE THERE? -(Trade Journal)   Volk, G.M., A.D. Henk and C.M. Richards. 2004. How many garlics are there? The Garlic Press 44:5-8.   
- CRYOPRESERVATION OF GARLIC (ALLIUM SATIVUM L.) USING PLANT VITRIFICATION SOLUTION 2 -(Peer Reviewed Journal)   Volk G.M., N. Maness, and K. Rotindo. 2004. Crypreservation of garlic (Allium sativum L.) using plant vitrification solution 2. CryoLetters 25:219-226.   
- CALCIUM CHANNELS ARE INVOLVED IN CALCIUM OXALATE CRYSTAL FORMATION IN SPECIALIZED CELLS OF PISTIA STRATIOTES L. -(Peer Reviewed Journal)   Volk G.M., L.J. Goss, V.R. Franceschi. 2004. Calcium channels are involved in calcium oxalate crystal formation in specialized cells of Pistia stratiotes L.  Annals of Botany 93:741-753.   
- GENETIC DIVERSITY AMONG US GARLIC CLONES AS DETECTED USING AFLP METHODS -(Peer Reviewed Journal)   Volk, G.M., A.D. Henk and C.M. Richards. 2004. Genetic Diversity among US garlic clones as detected using AFLP methods. Journal of the American Society for Horticultural Science 129(4):559-569.   
- LOW TEMPERATURE STORAGE OF VARIETAL GARLICS -(Peer Reviewed Journal)   Volk G.M., K. Rotindo and W. Lyons. 2004. Low-temperature storage of garlic for spring planting.  HortScience (39)3:571-573.   
- SPRING PLANTING OF GARLIC -(Trade Journal)   Cross K, G. Volk and W. Lyons. 2004. Spring planting of garlic. The Garlic Press 43:17.   
- FRESH GARLIC IN THE SPRING? COLD STORAGE MAY BE THE ANSWER! -(Trade Journal)   Cross K, G. Volk and W. Lyons. 2004. Fresh garlic in the spring? Cold storage may be the answer. The Garlic Press 43:16.   
- DIVERSITY OF GARLIC ACCESSIONS WITHIN THE NATIONAL PLANT GERMPLASM SYSTEM -(Abstract Only)   Volk, G.M., Henk, A.D., Richards, C.M. 2003. Diversity of garlic accessions within the national plant germplasm system. HortScience. 2003. 38:736.   
- PRESERVATION OF GENETIC RESOURCES IN THE NATIONAL PLANT GERMPLASM CLONAL COLLECTIONS -(Review Article)   Volk, G.M. and C. Walters. 2003. Preservation of genetic resources in the national plant germplasm clonal collections. Plant Breeding Reviews 23:291-344.   
- GALACTINOL SYNTHASE GENE EXPRESSION IN MELON -(Peer Reviewed Journal)   VOLK, G.M., HARITATOS, E.E., TURGEON, R. GALACTINOL SYNTHASE GENE EXPRESSION IN MELON. AMERICAN SOCIETY FOR HORTICULTURAL SCIENCE. 2003. Vol. 128:p.8-15.   
- GARLIC STORAGE RESEARCH -(Trade Journal)   VOLK, G.M. GARLIC STORAGE RESEARCH. GARLIC PRESS. 2002. v.40.p.17   
- VEGETATIVELY PROPAGATED COLLECTIONS IN THE U.S. NATIONAL PLANT GERMPLASM SYSTEM. -(Abstract Only)   Volk, G.M., Walters, C. 2002. Vegetatively propagated collections in the U.S. national plant germplasm system. Cryobiology. 39th Meeting of the Society for Cryobiology, July 28-31, 2002, Breckenridge, Colorado. p.151.   
- IMPROVEMENT OF VARIETAL GARLIC VIABILITY BY COLD STORAGE -(Abstract Only)   Cross, K.E., Volk, G.M. 2002. Improvement of varietal garlic viability by cold storage. Colorado State University Undergraduate Research: Creative Symposium, April 23, 2002, Fort Collins, Colorado. p.17.   
- COMPARISON OF DNA EXTRACTION METHODS FOR GENETIC ANALYSIS OF GARLIC -(Abstract Only)   Harris, J., Henk, A.D., Volk, G.M. Comparison of dna extraction methods for genetic analysis of garlic. Colorado State University Undergraduate Research: Creative Symposium, April 23, 2002, Fort Collins, Colorado. p.60.   
- GENETIC VARIABILITY AMONG ACCESSIONS OF GARLIC IN THE USDA NATIONAL PLANT GERMPLASM SYSTEM -(Abstract Only)   VOLK, G.M., HENK, A.D., RICHARDS, C.M. GENETIC VARIABILITY AMONG ACCESSIONS OF GARLIC IN THE USDA NATIONAL PLANT GERMPLASM SYSTEM. American Society of Plant Biologists. 2002. Pp25.   
- THE ROLE OF DRUSE AND RAPHIDE CALCIUM OXALATE CRYSTALS IN TISSUE CALCIUM REGULATION IN PISTIA STRATIOTES LEAVES -(Peer Reviewed Journal)   Volk, G.M., V. Lynch-Holm, T.A. Kostman, and V.R. Franceshi. 2002.  The role of druse and raphide calcium oxalate crystals in tissue calcium regulation in Pistia stratiotes leaves. Plant Biology 4:34-45.   

- Projects Curation and Research to Safeguard and Expand Collections of Plant and Microbial Genetic Resources and Associated Descriptive InformationIn-House Appropriated (D) Accession Number:443907Reimbursement for Potato PVP Accessions Cryopreserved and Maintained as Tissue Culture as Specified under the Plant Variety ProtectionInteragency Reimbursable Agreement (I) Accession Number:441682Enhancing Educational Outcomes for Plant Genetic Resources Conservation and UseReimbursable Cooperative Agreement (R) Accession Number:438821The Chemistry and Effectiveness of Plant Vitrification Solutions for Use in CryopreservationNon-Assistance Cooperative Agreement (S) Accession Number:436742Plant Exploration in the Central Highlands and Mountainous Area of Northern Vietnam to Collect Malus doumeri GermplasmNon-Assistance Cooperative Agreement (S) Accession Number:437466Plant Genetic Resources for Tropical Crop CollectionsNon-Assistance Cooperative Agreement (S) Accession Number:438597Development of Educational Materials for the Conservation and Use of Plant Genetic ResourcesNon-Assistance Cooperative Agreement (S) Accession Number:442639Genotypic Analyses of the USDA-National Plant Germplasm System Apple CollectionNon-Assistance Cooperative Agreement (S) Accession Number:442640Plant Exploration to Collect Citrus in VietnamNon-Assistance Cooperative Agreement (S) Accession Number:443020
- ARS News Articles ARS Scientists Cryopreserve Pest-Imperiled Ash TreesScientists Put Citrus in "Deep Freeze" to Preserve ItSecuring Plant Genebank Collections and Providing Educational Resources For Training OpportunitiesUSDA's Agricultural Research Service Honors Scientists of the YearNonviable Seeds May Contain Research-Quality DNA
As a Plant Physiologist, I focus on improving the management of vegetatively propagated collections in the USDA National Plant Germplasm System (NPGS) using a wide range of techniques. With the apple collection as a model system, we have identified and explored novel diversity, collected wild species, developed tools to identify heritage apple trees on public lands, and co-authored "A Global Strategy for the Conservation and Use of Apple Genetic Resources". My team has developed and implemented cryopreservation methods for preserving citrus, grapes, garlic, Prunus, and other crops at the National Laboratory for Genetic Resources Preservation. In addition, I'm co-coordinator of an effort to build and release public training materials relating to the conservation and use of plant genetic resources.

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