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Gennaro  Fazio    Research Geneticist (Plants) /ARSUserFiles/24554/GennaroFazio.jpg Plant Genetic Resources UnitUSDA, ARS630 W. North St., Geneva, NY  14456315 787 2480 (office)315 787 2216 (fax) **Overview** I am a plant breeder and research geneticist with the USDA-ARS Plant Genetic Resources Unit in Geneva, NY.  The focus of my research is to develop new apple rootstocks that are more productive than current commercially available varieties and are resistant to devastating diseases like fire blight (caused by Erwinia amylovora) and replant disease.  Part of the research focus is directed toward developing marker assisted breeding protocols for the breeding program, therefore I conduct basic and applied research on apple genetics, particularly in the area of disease resistance, root and tree architecture, rootstock mediated plant nutrition and dwarfing mechanisms of apple rootstocks.  My research also aims to expand use of genetic resources within the National Malus Collection for apple rootstock improvement. **Education** Ph.D. Plant Breeding and Genetics, 2001, University of Wisconsin-Madison Department of Plant Breeding and Plant Genetics. Area of study: Application of molecular markers for breeding, quantitative genetics, plant variety identification,
M.S. Agronomy-Molecular Biology, 1997, Brigham Young University, Provo, Utah.  Area of study: Identification of molecular markers linked to crown rot resistance in tomato.
B.S. Molecular Biology and Agronomy, Chemistry minor, 1995, Brigham Young University, Provo, Utah. **Professional Experience** Current Position: Research Geneticist, 2001-present, Plant Genetic Resources Unit, USDA-ARS, Geneva NY.
Adjunct Associate Professor, 2001-present, Horticultural Sciences Dept. Cornell University, Geneva NY.
Research Assistant, 1997-2001, University of Wisconsin-Madison.
Consultant, 1997, Animal Science Department, Brigham Young University.  Publications(Clicking on the reprint iconReprint Icon  will take you to the publication reprint.)Effect of Solution pH on Root Architecture and Dynamics of Root Distribution of Four Apple Rootstocks Grown in an Aeroponics Nutrient Misting System-(Peer Reviewed Journal)Management of Honeycrisp Apple Trees for Maximum Sustained Yield and Minimal Bitter Pit-(Trade Journal) Robinson, T., Lailang, C., Mario, M., Luis, G., Brian, L., Chris, W., Craig, K., Mike, B., Fazio, G. 2024. Management of Honeycrisp Apple Trees for Maximum Sustained Yield and Minimal Bitter Pit. New York State Fruit Quarterly. https://doi.org/10.21273/HORTTECH.25.3.385.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.The fire blight resistance QTL on LG7 of Malus ×robusta 5 is not dependent on the avrRpt2EA 156 S/C amino acid switch-(Peer Reviewed Journal) Emeriewen, O.F., Reim, S., Richter, K., Wohner, T., Flachowsky, H., Peil, A., Aldwinckle, H., Fazio, G. 2023. The fire blight resistance QTL on LG7 of Malus ×robusta 5 is not dependent on the avrRpt2EA 156 S/C amino acid switch. Journal of Plant Pathology for Germany. https://doi.org/10.1007/s42161-023-01458-2.Long-term effects of rootstock and tree type on the economic profitability of ‘Gala’, ‘Fuji’ and ‘Honeycrisp’ orchards performance.-(Peer Reviewed Journal) Gonzalez-Nieto, L., Reig, G., Lordan, J., Miranda-Sazo, M., Hoying, S., Fargione, M., Reginato, G., Donahue, D., Francescatto, P., Casagrande-Biasuz, E., Fazio, G., Robinson, T. 2023. Long-term effects of rootstock and tree type on the economic profitability of ‘Gala’, ‘Fuji’ and ‘Honeycrisp’ orchards performance. Scientia Horticulturae. https://doi.org/10.1016/j.scienta.2023.112129.New Releases from the Geneva® Apple Rootstock Breeding Program-(Trade Journal) Fazio, G., Robinson, T. 2023. New Releases from the Geneva® Apple Rootstock Breeding Program. New York State Fruit Quarterly. 31(1):29-33.Genetic analysis of resistance to Pythium ultimum a major component of replant disease in apple rootstocks-(Peer Reviewed Journal) Fazio, G., Mazzola, M., Zhu, Y. 2023. Genetic analysis of resistance to Pythium ultimum a major component of replant disease in apple rootstocks. Journal of the American Pomological Society. 77(1)28-37.Rootstock Evaluation Should Not Only Measure Yield Efficiency but Also Potential Yield and Crop Value at the Optimum Projected Spacing-(Peer Reviewed Journal)Interstems reveal scion variety potential to transport nutrients-(Abstract Only)Virus studies in the Geneva® apple rootstock breeding program-(Trade Journal)Apple rootstocks can modulate the chilling requirements of grafted scions-(Abstract Only)Imagine rootstocks-(Abstract Only)Selection of Apple Rootstock Breeding Families for Phytophthora Crown Rot Resistance-(Peer Reviewed Journal)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.Time analysis of rootstock mediated nutrient transport in Honeycrisp-(Peer Reviewed Journal)Contrasting effects of genotype and root size on the fungal and bacterial communities associated with apple rootstocks-(Peer Reviewed Journal) Liu, J., Abdelfattah, A., Wasserman, B., Wisniewski, M., Droby, S., Fazio, G., Mazzola, M., Wu, X. 2022. Contrasting effects of genotype and root size on the fungal and bacterial communities associated with apple rootstocks. Horticulture Research. 9. Article uhab013. https://doi.org/10.1093/hr/uhab013.Geneva series rootstocks for apple trees under extreme replanting conditions in southern Brazil-(Peer Reviewed Journal) Rufato, L., Silva, P., Kretzschmar, A., Bogo, A., Macedo, T., Welter, J., Fazio, G., Petry, D. 2021. Geneva series rootstocks for apple trees under extreme replanting conditions in southern Brazil. Frontiers in Plant Science. https://doi.org/10.3389/fpls.2021.712162.Laccase directed lignification is one of the major processes associated with the defense response against Pythium ultimum infection in apple roots-(Peer Reviewed Journal) Zhu, Y., Li, G., Singh, J., Khan, A., Fazio, G., Saltzgiver, M., Xia, R. 2021. Laccase directed lignification is one of the major processes associated with the defense response against Pythium ultimum infection in apple roots. Frontiers in Plant Science. 12. Article 629776. https://doi.org/10.3389/fpls.2021.629776.Low temperature tolerance in apple shoots following exposure to warm temperatures in late winter-(Peer Reviewed Journal) Moran, R.E., Peterson, B.J., Fazio, G., Cline, J.A. 2021. Low temperature tolerance in apple shoots following exposure to warm temperatures in late winter. HortScience. https://doi.org/10.21273/HORTSCI15665-20.Genomic consequences of apple improvement-(Peer Reviewed Journal) Migicovsky, Z., Gardner, K., Richards, C.M., Chao, T., Schwaninger, H., Fazio, G., Zhong, G., Myles, S. 2021. Genomic consequences of apple improvement. Horticulture Research. https://doi.org/10.1038/s41438-020-00441-7.Micropropagazione, una nuova opportunità per il melo-(Trade Journal)Long-term performance of 'Delicious' apple trees grafted on Geneva rootstocks and trained to four high-density systems under New York State climatic conditions-(Peer Reviewed Journal) Reig, G., Robinson, T., Fazio, G., Lordan, J., Hoying, S., Fargione, M., Donahue, D., Francescatto, P., Acimovic, D. 2020. Long-term performance of 'Delicious' apple trees grafted on Geneva rootstocks and trained to four high-density systems under New York State climatic conditions. HortScience. https://doi.org/10.21273/HORTSCI14904-20.Picking the right rootstock for fresh and processing apple orchards-(Trade Journal) Robinson, T.L., Fazio, G. 2019. Picking the right rootstock for fresh and processing apple orchards. New York State Fruit Quarterly. 28 (4) p 5-10.Melo: per ogni portinnesto il suo fertilizzante-(Trade Journal) Fazio, G., Lordan, J., Reig, G., Grusack, M., Cheng, L., Robinson, T.L. 2019. Melo: per ogni portinnesto il suo fertilizzante. Agricultural Informant. 43 p 41-49.Chapter 2 - Advances in development and utilization of rootstocks for fruit tree cultivation-(Book / Chapter) Fazio, G., Robinson, T. 2020. Chapter 2 - Advances in development and utilization of rootstocks for fruit tree cultivation. Book Chapter. 1. http://dx.doi.org/10.19103/AS.2018.0040.02.Apple whole genome sequences: recent advances and new prospects-(Peer Reviewed Journal) Peace, C.P., Bianco, L., Troggio, M., Van De Weg, E., Howard, N.P., Cornille, A., Durel, C., Myles, S., Migicovskv, Z., Schaffer, R., Costes, E., Fazio, G., Yamane, H., Van Nocker, S., Gottschalk, C., Costa, F., Chagne, D., Zhang, X., Patocchi, A., Gardiner, S.E., Hardner, C., Kumar, S., Laurens, F., Bucher, E., Main, D., Jung, S., Vanderzande, S. 2019. Apple whole genome sequences: recent advances and new prospects. Horticulture Research. 6:59.Effect of tree type and rootstock on the long-term performance of 'Gala', 'Fuji' and 'Honeycrisp' apple trees in a Tall Spindle production system under New York State climatic conditions-(Peer Reviewed Journal) Reig, G., Lordan, J., Sazio, M.M., Hoying, S., Fargione, M., Reginato, G., Donahue, D., Francescatto, P., Fazio, G., Robinson, T. 2018. Effect of tree type and rootstock on the long-term performance of 'Gala', 'Fuji' and 'Honeycrisp' apple trees in a Tall Spindle production system under New York State climatic conditions. Scientia Horticulturae. 246:506-517.Honeycrisp Apple Fruit Nutrient Concentration Affected By Apple Rootstocks-(Peer Reviewed Journal) Fazio, G., Cheng, L., Francescatto, P., Lordan, J., Wallis, A., Grusak, M.A., Robinson, T. 2018. Honeycrisp Apple Fruit Nutrient Concentration Affected By Apple Rootstocks. Acta Horticulturae. 1228, 223-228. https://doi.org/10.17660/ActaHortic.2018.1228.33.Long-term performance of 'Gala', 'Fuji' and'Honeycrisp' apple trees grafted on Geneva rootstocks and trained to four production systems under New York State climatic conditions-(Peer Reviewed Journal) Reig, G., Lordan, J., Sazo, M.M., Hoying, S., Fargione, M., Reginato, G., Donahue, D.J., Francescatto, P., Fazio, G., Robinson, T. 2019. Long-term performance of 'Gala', 'Fuji' and'Honeycrisp' apple trees grafted on Geneva rootstocks and trained to four production systems under New York State climatic conditions. Scientia Horticulturae. 244:277-293. https://doi.org/10.1016/j.scienta.2018.09.025.Genotypic variation in apple rootstock cold temperature tolerance during spring and fall-(Peer Reviewed Journal) Moran, R.E., Peterson, B.J., Fazio, G., Cline, J. 2018. Genotypic variation in apple rootstock cold temperature tolerance during spring and fall. Journal of the American Society for Horticultural Science. 143:319-332.Apple rootstocks: history, physiology, management and breeding-(Peer Reviewed Journal) Marini, R., Fazio, G. 2017. Apple rootstocks: history, physiology, management and breeding. Horticultural Reviews. 78:197-312.Effect of scion and graft type on transpiration, hydraulic resistance and xylem hormone profile of apples grafted on Geneva®41 and M.9-NICTM29 rootstocks-(Peer Reviewed Journal) Adams, S., Lordan, J., Fazio, G., Bugbee, B., Francescatto, P., Robinson, T., Black, B. 2017. Effect of scion and graft type on transpiration, hydraulic resistance and xylem hormone profile of apples grafted on Geneva®41 and M.9-NICTM29 rootstocks. Scientia Horticulturae. 227:213-222.Effects of apple (Malus x domestica) rootstocks on scion performance and hormone concentration-(Peer Reviewed Journal) Lordan, J., Fazio, G., Francescatto, P., Robinson, T. 2017. Effects of apple (Malus x domestica) rootstocks on scion performance and hormone concentration. Scientia Horticulturae. 225:96-105.Horticultural performance and elemental concentration of 'Fuji' grafted on Geneva apple rootstocks under New York climatic conditions-(Peer Reviewed Journal) Reig, G., Lordan, J., Fazio, G., Grusak, M.A., Hoying, S., Cheng, L., Francescatto, P., Robinson, T. 2018. Horticultural performance and elemental concentration of 'Fuji' grafted on Geneva apple rootstocks under New York climatic conditions. Scientia Horticulturae. 227:22-37.Evaluating and improving rootstocks for apple cultivation-(Book / Chapter) Fazio, G. 2017. Evaluating and improving rootstocks for apple cultivation. In: Evans, K., editor. Achieving sustainable cultivation of apples. Burleigh Dodds Science Publishing Limited. p. 135-153.Genotyping-by-sequencing markers facilitate the identification of quantitative trait loci controlling resistance to Penicillium expansum in Malus sieversii-(Peer Reviewed Journal) Norelli, J.L., Wisniewski, M.E., Fazio, G., Burchard, E.A., Gutierrez, B.L., Levin, E., Droby, S. 2017. Genotyping-by-sequencing markers facilitate the identification of quantitative trait loci controlling resistance to Penicillium expansum in Malus sieversii. PLoS One. doi: 10.1371/journal.pone.0172949.Progress report to the International Fruit Tree Association-(Trade Journal) Fazio, G., Francescatto, P., Lordan, J., Peck, G., Robinson, T. 2016. Progress report to the International Fruit Tree Association. Compact Fruit Tree. December 2016, p. 21.The effect of plant growth regulators on apple graft union flexural strength and flexibility-(Peer Reviewed Journal) Adams, S., Black, B.L., Fazio, G., Roberts, N. 2017. The effect of plant growth regulators on apple graft union flexural strength and flexibility. Journal of American Pomological Society. 71:8-18.Performance of Geneva® apple rootstock selections with ‘Brookfield Gala’ and ‘Cripps Pink’ on a tall spindle system-(Peer Reviewed Journal) Wallis, A., Harshman, J., Butler, B., Price, D., Fazio, G., Walsh, C. 2017. Performance of Geneva® apple rootstock selections with ‘Brookfield Gala’ and ‘Cripps Pink’ on a tall spindle system. Journal of American Pomological Society. 71(3): 137-148.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.Where are we now as we merge genomics into plant breeding and what are our limitations?  Experiences from RosBREED-(Proceedings) Iezzoni, A., Peace, C., Bassil, N.V., Coe, M., Fazio, G., Gallardo, K., Gasic, K., Luby, J., Mcferson, J., Van De Weg, E.W., Weebadde, C. 2016. Where are we now as we merge genomics into plant breeding and what are our limitations?  Experiences from RosBREED. Acta Horticulturae. 1117:1-6. doi: 10.17660/ActaHortic.2016.1117.1.Genome to phenome mapping in apple using historical data-(Peer Reviewed Journal) Migicovsky, Z., Gardner, K., Money, D., Sawler, J., Bloom, J., Moffett, P., Chao, C.T., Schwaninger, H.R., Fazio, G., Zhong, G., Myles, S. 2016. Genome to phenome mapping in apple using historical data. The Plant Genome. 9(2). doi: 10.3835/plantgenome2015.11.0113.Transcriptome changes specifically associated with apple (Malus domestica) root defense response during Pythium ultimum infection-(Peer Reviewed Journal) Shin, S.B., Zheng, P., Fazio, G., Mazzola, M., Main, D., Zhu, Y. 2016. Transcriptome changes specifically associated with apple (Malus domestica) root defense response during Pythium ultimum infection. Physiological and Molecular Plant Pathology. 94:16-26.Citrus Research Board-sponsored review of the University of California Riverside citrus breeding-(Abstract Only) Stover, E.W., Fazio, G., Forner-Giner, M., Mehlenbacher, S., Preece, J.E. 2016. Citrus Research Board-sponsored review of the University of California Riverside citrus breeding[abstract]. California Citrus Showcase. March 3, 2016, Visalia, CaliforniaApple rootstock resistance to drought-(Peer Reviewed Journal) Tworkoski, T., Fazio, G., Glenn, D.M. 2016. Apple rootstock resistance to drought. Scientia Horticulturae. 204:70-78.Differential transcriptional regulation of defense-associated genes among apple rootstock genotypes in response to Pythium ultimum-(Abstract Only) Zhu, Y., Mazzola, M., Fazio, G. 2015. Differential transcriptional regulation of defense-associated genes among apple rootstock genotypes in response to Pythium ultimum. American Phytopathological Society Annual Meeting. N/A.2015 Progress Report – Evaluation of the Cornell-Geneva Apple Rootstocks and Other Promising Apple Rootstocks-(Trade Journal) Robinson, T., Fazio, G., Black, B., Parra, R. 2015. 2015 Progress Report – Evaluation of the Cornell-Geneva Apple Rootstocks and Other Promising Apple Rootstocks. Compact Fruit Tree. 48(1):22-25.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.Hormone and growth interactions of scions and size-controlling rootstocks of young apple trees-(Peer Reviewed Journal) Tworkoski, T., Fazio, G. 2015. Hormone and growth interactions of scions and size-controlling rootstocks of young apple trees. Plant Growth Regulation. DOI: 10.1007/s10725-015-0078-2.Apple rootstock evaluation for apple replant disease-(Peer Reviewed Journal) Kviklys, D., Robinson, T., Fazio, G. 2016. Apple rootstock evaluation for apple replant disease. Acta Horticulturae. 1130:425-430.The Geneva apple rootstock breeding program-(Peer Reviewed Journal) Fazio, G., Robinson, T., Aldwinckle, H. 2015. The Geneva apple rootstock breeding program. Plant Breeding Reviews. 39:379-424.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.Effects of size-controlling apple rootstocks on growth, ABA, and hydraulic conductivity of scion of different vigor-(Peer Reviewed Journal) Tworkoski, T., Fazio, G. 2015. Effects of size-controlling apple rootstocks on growth, ABA, and hydraulic conductivity of scion of different vigor. International Journal of Fruit Science. doi: 10.1080/15538362.2015.1009973.Preliminary identification of QTLs controlling water use efficiency in 'Gala' apple (Malus x domestica)-(Abstract Only) Artlip, T.S., Norelli, J.L., Wisniewski, M.E., Fazio, G., Glenn, D.M. 2015. Preliminary identification of QTLs controlling water use efficiency in 'Gala' apple (Malus x domestica) [abstract]. Plant and Animal Genome Conference. p. 875.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.Elucidating the molecular responses of apple rootstock resistant to ARD pathogens: Challenges and opportunities for development of genomics-assisted breeding tools-(Peer Reviewed Journal) Zhu, Y., Fazio, G., Mazzola, M. 2014. Elucidating the molecular responses of apple rootstock resistant to ARD pathogens: Challenges and opportunities for development of genomics-assisted breeding tools. Horticulture Research. https://doi.org/10.1038/hortres.2014.43.Breeding apple rootstocks in the 21st century – what can we expect them to do to increase productivity in the orchard?-(Peer Reviewed Journal) Fazio, G. 2014. Breeding apple rootstocks in the 21st century – what can we expect them to do to increase productivity in the orchard?. Acta Horticulturae. 1058:421-428.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.Characteristics and performance of four new apple rootstock from the Cornell-USDA apple rootstock breeding program-(Peer Reviewed Journal) Robinson, T., Fazio, G., Aldwinckle, H. 2014. Characteristics and performance of four new apple rootstock from the Cornell-USDA apple rootstock breeding program. Acta Horticulturae. 1058:651-656.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.Transcriptome profiling on apple root defense responses to infection by Pythium ultimum-(Proceedings) Zhu, Y., Zheng, P., Shin, S.B., Fazio, G., Mazzola, M., Main, D. 2014. Transcriptome profiling on apple root defense responses to infection by Pythium ultimum. Proceedings of 7th International Rosaceae Genomics Conference. 12.Candidate gene approach and transcriptome analysis to elucidate the defense responses in apple rootstocks against replant disease inciting pathogens-(Abstract Only)Differential molecular response of apple rootstocks to replant disease causing soil-borne pathogens-(Proceedings) Shin, S.B., Fazio, G., Norelli, J.L., Mazzola, M., Zhu, Y. 2014. Differential molecular response of apple rootstocks to replant disease causing soil-borne pathogens. Proceedings of 7th International Rosaceae Genomics Conference. 70.Isolation and characterization of apple Pythium ultimum response genes and their ethylene and jasmonate mediated transcriptional regulation-(Proceedings) Shin, S.B., Fazio, G., Mazzola, M., Zhu, Y. 2014. Isolation and characterization of apple Pythium ultimum response genes and their ethylene and jasmonate mediated transcriptional regulation. Proceedings of 7th International Rosaceae Genomics Conference. 12.Relationship of apple rootstock dwarfing loci (Dw1, Dw2) with scion leaf and fruit nutrient status-(Abstract Only) Fazio, G., Robinson, T. 2014. Relationship of apple rootstock dwarfing loci (Dw1, Dw2) with scion leaf and fruit nutrient status. [Abstract]. Horticultural Science, Fruit Crop Physiology Symposium.  Oral Presentation.Mapping in an apple (Malus x domestica) F1 segregating population based on physical clustering of differentially expressed genes-(Peer Reviewed Journal) Jensen, P., Fazio, G., Altman, N., Craig, P., Mcnellis, T. 2014. Mapping in an apple (Malus x domestica) F1 segregating population based on physical clustering of differentially expressed genes. Biomed Central (BMC) Genomics. 15:261.Dw2 a new dwarfing locus in apple rootstocks and relationship to induction of early bearing in apple scions-(Peer Reviewed Journal) Fazio, G., Wan, Y., Kviklys, D., Romero, L., Adams, R., Strickland, D., Robinson, T. 2014. Dw2 a new dwarfing locus in apple rootstocks and relationship to induction of early bearing in apple scions. Journal of the American Society for Horticultural Science. 139(2):87–98.Phenotypic diversity and QTL mapping of absorption and translocation of nutrients by apple rootstocks-(Peer Reviewed Journal) Fazio, G., Kviklys, D., Grusak, M.A., Robinson, T. 2013. Phenotypic diversity and QTL mapping of absorption and translocation of nutrients by apple rootstocks. Aspects of Applied Biology. 119:37-50.Interaction of scions and rootstocks of size-controlling rootstocks of young apple trees-(Abstract Only) Tworkoski, T., Fazio, G. 2013. Interaction of scions and rootstocks of size-controlling rootstocks of young apple trees [abstract]. Plant Growth Regulaton Society of America. p. 24.Unique characteristics of Geneva apple rootstocks-(Other) Fazio, G., Aldwinckle, H., Robinson, T. 2013. Unique characteristics of Geneva apple rootstocks. New York State Fruit Quarterly 1(2):25-28.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.Introduction-(Book / Chapter) Robinson, T., Brown, S., Fazio, G., Aldwinckle, H. 2014. Introduction. Compendium of Apple and Pear Diseases and Pests. 2nd ed. Minnesota, APS Press. pp. 1-7.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 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.A natural mutation led truncation in Ma1, one of the two aluminum-activated malate transporter like genes at the Ma locus, is associated with low fruit acidity in apple-(Peer Reviewed Journal) Bai, Y., Doughtery, L., Li, M., Fazio, G., Cheng, L., Xu, K. 2012. A natural mutation led truncation in Ma1, one of the two aluminum-activated malate transporter like genes at the Ma locus, is associated with low fruit acidity in apple. Molecular Genetics and Genomics. 287:563-678.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.Putative resistance gene markers associated with quantitative trait loci for fire blight resistance in Malus 'Robusta 5' accessions-(Peer Reviewed Journal) Norelli, J.L., Gardner, S., De Silva, N., Fazio, G., Peil, A., Malnoy, M., Homer, M., Bowatta, D., Carlisle, C., Wan, Y., Bassett, C.L., Baldo, A.M., Celton, J., Aldwinckle, H., Bus, V. 2012. Putative resistance gene markers associated with quantitative trait loci for fire blight resistance in Malus 'Robusta 5' accessions. Biomed Central (BMC) Plant Biology. 13:25.Soil pH, soil type and replant disease affect growth and nutrient absorption in apple rootstocks-(Trade Journal) Fazio, G., Kviklys, D., Grusak, M.A., Robinson, T. 2012. Soil pH, soil type and replant disease affect growth and nutrient absorption in apple rootstocks. New York State Fruit Quarterly. 20(1):22-28.Rootstock-regulated gene expression patterns associated with fire blight resistance in apple-(Peer Reviewed Journal) Jensen, P.J., Halbrendt, N., Fazio, G., Makalowska, I., Altman, N., Praul, C., Maximova, S.N., Crassweller, R.M., Travis, J., Mcnellis, T. 2012. Rootstock-regulated gene expression patterns associated with fire blight resistance in apple. Biomed Central (BMC) Genomics. 13:9.Physiological processes of size-controlling rootstocks in apple-(Proceedings) Tworkoski, T., Fazio, G. 2012. Physiological processes of size-controlling rootstocks in apple. In: Proceedings of the 87th Annual Cumberland-Shenandoah Fruit Workers Conference, December 1-2,2011, Winchester, VA. p. 11.Cold temperature tolerance of apple rootstock trunk and root tissues-(Peer Reviewed Journal) Moran, R., Zhang, D., Geng, F., Sun, Y., Fazio, G. 2011. Cold temperature tolerance of apple rootstock trunk and root tissues. HortScience. 46:1460-1464.Geneva rootstocks for weak growing scion cultivars like Honeycrisp-(Trade Journal) Robinson, T., Fazio, G., Hoying, S., Miranda, M., Iungerman, K. 2011. Geneva rootstocks for weak growing scion cultivars like Honeycrisp. New York State Fruit Quarterly. 19:10-16.Geneva apple rootstock performance in New York state and progress in commercialization-(Trade Journal) Robinson, T., Fazio, G., Hoying, S., Miranda, M., Iungerman, K. 2011. Geneva apple rootstock performance in New York state and progress in commercialization. Compact Fruit Tree. 44:22-28.EST contig-based SSR linkage maps for Malus × domestica cv ‘Royal Gala’ and an apple scab resistant accession of M. sieversii, the progenitor species of domesticated apple-(Peer Reviewed Journal) Wang, A., Aldwinckle, H., Forsline, P., Main, D., Fazio, G., Brown, S., Xu, K. 2011. EST contig-based SSR linkage maps for Malus × domestica cv ‘Royal Gala’ and an apple scab resistant accession of M. sieversii, the progenitor species of domesticated apple. Molecular Breeding. DOI: 10.1007/s11032-011-9554-1.Identification of wild apple germplasm (Malus spp.) with resistance to the postharvest decay pathogens Penicillium expansum and Colletotrichum acutatum-(Peer Reviewed Journal) Jurick Ii, W.M., Janisiewicz, W.J., Saftner, R.A., Vico, I., Gaskins, V.L., Park, E., Forsline, P.L., Fazio, G., Conway, W.S. 2011. Identification of wild apple germplasm (Malus spp.) with resistance to the postharvest decay pathogens Penicillium expansum and Colletotrichum acutatum. Plant Breeding. 130:481-486.Implementation of molecular marker technologies in the apple rootstock breeding program in Geneva - challenges and successes-(Proceedings)The history of apple breeding in People’s Republic Of China-(Proceedings)The distribution of wild apple germplasm in Northwest China and their potential application to the apple rootstock breeding-(Proceedings)Confirmation By QTL mapping Of The Malus Robusta  (Cv. Robusta 5) derived powdery mildew resistance gene Pl1-(Proceedings)Identification Of Malus ERF Genes Responsive To Waterlogged Conditions In Apple Rootstocks-(Other) Yang, B., Fazio, G., Aldwinckle, H., Xu, K. 2010. Identification Of Malus ERF Genes Responsive To Waterlogged Conditions In Apple Rootstocks. Plant and Animal Genome Conference.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.Rootstock genotype succession influences apple replant disease and root-zone microbial community composition in an orchard soil-(Peer Reviewed Journal) St. Laurent, A., Merwin, I., Fazio, G., Thies, J., Brown, M. 2010. Rootstock genotype succession influences apple replant disease and root-zone microbial community composition in an orchard soil. Plant and Soil Journal. DOI: 10.1007/s11104-010-0522-2.Candidate fire blight resistance genes in Malus identified with the use of genomic tools and approaches-(Abstract Only) Norelli, J.L., Gardiner, S.E., Malnoy, M., Aldwinckle, H.S., Baldo, A.M., Bassett, C.L., Fazio, G., Horner, M.B., Celton, J., Borejsza-Wysocka, E., Bowatte, D.R., Carlisle, C.M., Lalli, D., Bus, V.G., Wisniewski, M.E. 2010. Candidate fire blight resistance genes in Malus identified with the use of genomic tools and approaches [abstract]. Fire Blight International Workshop. p. 42.Determination of fire blight resistance and construction of a molecular genetic map in a bi-parental Malus sieversii population-(Abstract Only) Lalli, D., Norelli, J.L., Malnoy, M., Pindo, M., Fazio, G., Forsline, P.L., Aldwinckle, H.S., Gardiner, S.E., Chagne, D., Wisniewski, M.E. 2010. Determination of fire blight resistance and construction of a molecular genetic map in a bi-parental Malus sieversii population [abstract]. Fire Blight International Workshop. p. 117.Creating a genetic framework map for Malus sieversii-(Abstract Only) Lalli, D., Wisniewski, M.E., Norelli, J.L., Fazio, G., Malnoy, M., Pindo, M., Forsline, P.L., Aldwinckle, H., Gardiner, S., Chagne, D. 2010. Creating a genetic framework map for Malus sieversii [abstract]. Fire Blight International Workshop. p. 263.A Coordinated Approach to Peach SNP Discovery in RosBREED-(Abstract Only)Comparative Gene Expression Of Architectural And Nutritional ESTs In Apple Root, Leaf And Stem Tissues-(Other) Adhikary, D., Baldo, A.M., Fazio, G. 2010. Comparative Gene Expression Of Architectural And Nutritional ESTs In Apple Root, Leaf And Stem Tissues. Plant and Animal Genome Conference.RosBREED: Enabling Marker-Assisted Breeding In Rosaceae-(Other) Iezonni, A., Peace, C., Main, D., Bassil, N.V., Luby, J., Yue, C., Van De Weg, E., Weebadde, C., Fazio, G., Bink, M., Brown, S., Byrne, D., Clark, J., Crisosto, C., Davis, T., Evans, K., Finn, C.E., Gallardo, K., Gasic, K., Gradziel, T., Hancock, J., Jussaume, R., Mccracken, V., Oraguzie, N., Reighard, G., Stone, A., Taylor, M., Wang, D., Xu, K. 2010. RosBREED: Enabling Marker-Assisted Breeding In Rosaceae. Plant and Animal Genome Conference.Mapping Malus sieversii:  A valuable genetic resource for apple breeding-(Abstract Only) Lalli, D., Wisniewski, M.E., Norelli, J.L., Malnoy, M., Pindo, M., Fazio, G., Forsline, P.L., Aldwinckle, H., Gardiner, S., Chagne, D. 2009. Mapping Malus sieversii:  A Valuable Genetic Resource for Apple Breeding. Plant and Animal Genome Conference Proceedings.  Abstract.  p. XVIII.RosBREED: Enabling Marker-Assisted Breeding in Rosaceae-(Peer Reviewed Journal) Iezzoni, A., Weebadde, C., Luby, J., Yue, C., Weg, E., Fazio, G., Bassil, N.V., Main, D., Peace, C., Mcferson, J. 2010. RosBREED: Enabling Marker-Assisted Breeding in Rosaceae. Acta Horticulturae.  859:389-394.Hormonal and anatomical effects of apple rootstocks-(Proceedings) Tworkoski, T., Fazio, G. 2010. Hormonal and anatomical effects of apple rootstocks. Proceedings of the 36th annual meeting of the Plant Growth Regulation Society of America, (PGRSA, LaGrange, GA). August 2-6, 2009, Asheville, North Carolina, p. 161.Analysis of Malus S-RNase gene diversity based on a comparative study of European wild apple, old and modern apple cultivars-(Peer Reviewed Journal) Dreesen, R., Vanholme, B., Luyten, K., Van Wynsberghe, L., Fazio, G., Roldan-Ruiz, I., Keulemans, J. 2010. Analysis of Malus S-RNase gene diversity based on a comparative study of European wild apple, old and modern apple cultivars. Molecular Ecology. Molecular Breeding DOI: 10.1007/s11032-010-9405-5.Comparative analysis and functional annotation of a large expressed sequence tag collection of apple-(Peer Reviewed Journal) Gasic, K., Gonzalez, D.O., Thimmapuram, J., Malnoy, M., Gong, G., Han, Y., Vodkin, L.O., Lei, L., Aldwinckle, H.S., Carroll, N., Orvis, K., Goldsbrough, P., Clifton, S., Pape, D., Fulton, L., Martin, J., Theising, B., Wisniewski, M.E., Fazio, G., Korban, S.S. 2009. Comparative analysis and functional annotation of a large expressed sequence tag collection of apple. The Plant Genome. 2(1):23-38.Interaction of brassicaceous seed meal and apple rootstock on recovery of Pythium spp. and Pratylenchus penetrans from roots grown in replant soils-(Peer Reviewed Journal) Mazzola, M., Brown, J., Zhao, X., Izzo, A., Fazio, G. 2009. Interaction of brassicaceous seed meal and apple rootstock on recovery of Pythium spp. and Pratylenchus penetrans from roots grown in replant soils. Plant Disease.  93:51-57.Physiological and morphological effects of size-controlling rootstocks on ‘Fuji’ scion-(Peer Reviewed Journal) Tworkoski, T., Fazio, G. 2011. Physiological and morphological effects of size-controlling rootstocks on ‘Fuji’ scion. Acta Horticulturae. 903:865-872.Nomenclature and Genetic Relationships of Apples and Pears from Terceira Island-(Peer Reviewed Journal) Bassil, N.V., Hummer, K.E., Postman, J.D., Fazio, G., Baldo, A.M., Armas, I., Williams, R. 2008. Nomenclature and Genetic Relationships of Apples and Pears from Terceira Island. Genetic Resources and Crop Evolution (2009). 56:339-352.Physiological and morphological effects of size-controlling rootstocks on 'Fuji' scion-(Abstract Only) Tworkoski, T., Fazio, G. 2008. Physiological and morphological effects of size-controlling rootstocks on 'Fuji' scion. International Symposium on Integrating Canopy, Rootstock and Environmental Physiology in Orchard Systems in Geneva, NY, August 4-8, 2008.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.Genetic Relationships within Heritage Apple and Pear Cultivars in the Azores-(Abstract Only) Bassil, N.V., Hummer, K.E., Postman, J.D., Fazio, G., Armas, I., Williams, R. 2007. Genetic Relationships within Heritage Apple and Pear Cultivars in the Azores. Plant and Animal Genome Conference.Budagovsky 9 rootstock: uncovering a novel resistance to fire blight-(Abstract Only) Russo, N., Aldwinckle, H., Robinson, T., Fazio, G. 2008. Budagovsky 9 rootstock: uncovering a novel resistance to fire blight. Acta Hort. 793:321-324.Investigation on the inheritance of strain specific resistance to Erwinia amylovora in an apple rootstock segregating population-(Proceedings) Fazio, G., Wan, Y., Russo, N., Aldwinckle, H. 2008. Investigation on the inheritance of strain specific resistance to Erwinia amylovora in an apple rootstock segregating population. Acta Hort. 793:331-335.Fire Blight Resistance of Budagovsky 9 Apple Rootstock-(Peer Reviewed Journal) Russo, N., Robinson, T., Fazio, G., Aldwinckle, H. 2008. Fire Blight Resistance of Budagovsky 9 Apple Rootstock. Plant Disease. 92(3):385-391.Biology and management of woolly apple aphid, Eriosoma lanigerum (Hausmann), in Washington State-(Proceedings) Beers, E., Cockfield, S., Fazio, G. 2007. Biology and management of woolly apple aphid, Eriosoma lanigerum (Hausmann), in Washington State. In: Proceedings of the IOBC, 30(4):37-42.Field Evaluation of Apple Rootstocks for Orchard Performance and Fire Blight Resistance-(Peer Reviewed Journal) Russo, N.L., Robinson, T.L., Fazio, G., Aldwinckle, H.S. 2007. Field Evaluation of Apple Rootstocks for Orchard Performance and Fire Blight Resistance. HortScience. 47:1517-1525.TRAITS OF THE NEXT WAVE OF GENEVA APPLE ROOTSTOCKS-(Abstract Only) Fazio, G., Robinson, T., Aldwinckle, H., Mazzola, M., Leinfelder, M., Parra, R. 2006. Traits of the next wave of geneva apple rootstocks. Meeting Abstract. Compact Fruit Tree 38(3):7-11.MARKER ASSISTED SELECTION OF APPLE ROOTSTOCKS - PROSPECTS, BENEFITS, AND LIMITATIONS.-(Proceedings) Fazio, G., Mazzola, M. 2004. Marker assisted selection of apple rootstocks - prospects, benefits, and limitations.. XIth Eucarpia Symposium on Fruit Breeding and Genetics. Acta Horticulturae. p. 663.DIFFERENTIAL SUSCEPTIBILITY TO FIRE BLIGHT IN COMMERCIAL AND EXPERIMENTAL APPLE ROOTSTOCK CULTIVARS-(Proceedings) Fazio, G., Aldwinckle, H., Mcquinn, R., Robinson, T. 2006. Differential susceptibility to fire blight in commercial and experimental apple rootstock cultivars. Acta Horticulture Proceedings (ISHS) 704:527-530.THE NATURE OF RESISTANCE OF THE 'B.9' APPLE ROOTSTOCK TO FIRE BLIGHT-(Proceedings) Logiudice, N., Aldwinckle, H.S., Robinson, T.L., Fazio, G. 2006. The nature of resistance of the 'b.9' apple rootstock to fire blight. Acta Hort. 704:515-520.IMPACT OF SOYBEAN AND RAPESEED SEED MEAL ON MICROBIAL POPULATIONS AND GROWTH OF APPLE IN REPLANT ORCHARD SOILS-(Peer Reviewed Journal) Mazzola, M., Cohen, M.F., Fazio, G. 2004. Impact of soybean and rapeseed seed meal on microbial populations and growth of apple in replant orchard soils. Phytopathology. 94:S68.CONFORMITY AND GENETIC RELATEDNESS ESTIMATION IN CROP SPECIES HAVING A NARROW GENETIC BASE:  THE CASE OF CUCUMBER (CUCUMIS SATIVUS L.)-(Peer Reviewed Journal) Staub, J.E., Chung, S., Fazio, G. 2004. Conformity and genetic relatedness estimation in crop species having a narrow genetic base: the case of cucumber (Cucumis sativus l.). Plant Breeding. 124:44-53.THE GENEVA SERIES OF APPLE ROOTSTOCKS FROM CORNELL: PERFORMANCE, DISEASE RESISTANCE, AND COMMERCIALIZATION-(Proceedings) Robinson, T., Aldwinckle, H., Fazio, G. 2003. The geneva series of apple rootstocks from cornell: performance, disease resistance, and commercialization. Acta Horticulture Proceedings 622:513-520.  ProjectsDevelopment of Improved Apple Rootstocks with Tolerance to Biotic and Abiotic StressesIn-House Appropriated (D)Accession Number:444221Breeding Designer Apple Rootstocks to Match Nutrient Parameters under Organic ManagementReimbursable Cooperative Agreement (R)Accession Number:441414Threat Assessment and Resistance Characterization of a Novel Ecotype of Woolly Apple AphidReimbursable Cooperative Agreement (R)Accession Number:442149  ARS News ArticlesitemARS Honors Top Scientists for 2006itemRooting Out the Best Genes in Apple RootstocksitemGoing Back to the Source for a Heartier Apple Tree


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