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                    U.S. DEPARTMENT OF AGRICULTURE
 Edward T. Schafer Agricultural Research Center: Fargo, ND
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ARS Home Plains Area Fargo, North Dakota Edward T. Schafer Agricultural Research Center People & Locations







William  Underwood
                        Edward T. Schafer Agricultural Research Center

                        




                        
                        Plant Pathologist
                        Phone: (701) 239-1316
                        
                        
                        Fax: (Employee information on this page comes from the REE Directory. Please contact your front office staff to update the REE Directory.)
                            ProjectsImprovement of Sclerotinia Disease Resistance and Management
                                                    In-House Appropriated
                                                                    (D)Accession Number: 441815Sunflower Yield, Crop Quality, and Interactions with Biotic and Abiotic Stressors
                                                    In-House Appropriated
                                                                    (D)Accession Number: 445350Evaluation of Sclerotinia Head Rot Resistance in Experimental Sunflower Germplasm Lines and Mapping Populations
                                                    Non-Assistance Cooperative Agreement
                                                                    (S)Accession Number: 446146Mapping Basal Stalk Rot Resistance and Oxalic Acid Tolerance Traits in Two Sunflower Recombinant Inbred Line Populations
                                                    Non-Assistance Cooperative Agreement
                                                                    (S)Accession Number: 444452Role of WRKY Transcription Factors in Quantitative Resistance to Sclerotinia sclerotiorum
                                                    Non-Assistance Cooperative Agreement
                                                                    (S)Accession Number: 436703QTL Mapping of Sclerotinia Head Rot Resistance and Pyramiding of Basal Stock Rot QTL in Sunflower
                                                    Non-Assistance Cooperative Agreement
                                                                    (S)Accession Number: 438291**Publications**
                                                (Clicking on the reprint icon
                                                    Reprint Icon
                                                    will take you to the publication reprint.)Multiple forms of resistance to the Phomopsis stem canker pathogens Diaporthe helianthi and D. gulyae in sunflower

- (Peer Reviewed Journal)Genetic analysis of basal stalk rot resistance introgressed from wild Helianthus petiolaris into cultivated sunflower (Helianthus annuus L.) using an advanced backcross population
                                                        

- (Peer Reviewed Journal)Talukder, M.I., Underwood, W., Misar, C.G., Li, Z., Seiler, G.J., Cai, X., Qi, L. 2023. Genetic analysis of basal stalk rot resistance introgressed from wild Helianthus petiolaris into cultivated sunflower (Helianthus annuus L.) using an advanced backcross population. Frontiers in Plant Science. 14. https://doi.org/10.3389/fpls.2023.1278048.Population and genome-wide association studies of Sclerotinia sclerotiorum isolates collected from diverse host plants throughout the United States
                                                        

- (Peer Reviewed Journal)Sharma Poudel, R., Belay, K., Nelson Jr, B., Brueggeman, R., Underwood, W. 2023. Population and genome-wide association studies of Sclerotinia sclerotiorum isolates collected from diverse host plants throughout the United States. Frontiers in Microbiology. 14. https://doi.org/10.3389/fmicb.2023.1251003.Mutation and sequencing-based cloning and functional studies of the rust resistance gene R11 in sunflower (Helianthus annuus)
                                                        

- (Peer Reviewed Journal)Shamimuzzaman, M., Ma, G., Underwood, W., Qi, L. 2023. Mutation and sequencing-based cloning and functional studies of the rust resistance gene R11 in sunflower (Helianthus annuus). Plant Journal. 115(2):480-493. https://doi.org/10.1111/tpj.16238.Characterization of oxalic acid tolerance in sunflower basal stalk rot resistance.

- (Abstract Only)Role of WRKY transcription factors in quantitative resistance to Sclerotinia sclerotiorum.

- (Abstract Only)A quantitative genetic study of Sclerotinia head rot resistance introgressed from the wild perennial Helianthus maximiliani into cultivated sunflower (Helianthus annuus L.)
                                                        

- (Peer Reviewed Journal)Talukder, M.I., Underwood, W., Misar, C., Seiler, G.J., Cai, X., Li, X., Qi, L. 2022. A quantitative genetic study of Sclerotinia head rot resistance introgressed from the wild perennial Helianthus maximiliani into cultivated sunflower (Helianthus annuus L.). International Journal of Molecular Sciences. 23(14). https://doi.org/10.3390/ijms23147727.Genomic insights into Sclerotinia basal stalk rot resistance introgressed from wild Helianthus praecox into cultivated sunflower (Helianthus annuus L.)
                                                        

- (Peer Reviewed Journal)Talukder, Z., Underwood, W., Misar, C.G., Seiler, G.J., Li, X., Cai, X., Qi, L. 2022. Genomic insights into Sclerotinia basal stalk rot resistance introgressed from wild Helianthus praecox into cultivated sunflower (Helianthus annuus L.). Frontiers in Plant Science. 13. Article 840954. https://doi.org/10.3389/fpls.2022.840954.Arabidopsis GOLD36/MVP1/ERMO3 is required for powdery mildew penetration resistance and proper targeting of the PEN3 transporter
                                                        

- (Peer Reviewed Journal)Underwood, W. 2022. Arabidopsis GOLD36/MVP1/ERMO3 is required for powdery mildew penetration resistance and proper targeting of the PEN3 transporter. Molecular Plant-Microbe Interactions. 35:393-400. https://doi.org/10.1094/MPMI-09-21-0240-R.QTL mapping of Sclerotinia head rot resistance introgressed from the wild perennial Helianthus maximiliani species into cultivated sunflower

- (Abstract Only)Multiple species of Asteraceae plants are susceptible to root infection by the necrotrophic fungal pathogen Sclerotinia sclerotiorum
                                                        

- (Peer Reviewed Journal)Underwood, W., Gilley, M., Misar, C.G., Gulya, T.J., Seiler, G.J., Markell, S.G. 2022. Multiple species of Asteraceae plants are susceptible to root infection by the necrotrophic fungal pathogen Sclerotinia sclerotiorum. Plant Disease. 106:1366-1373. https://doi.org/10.1094/PDIS-06-21-1314-RE.Unraveling the Sclerotinia basal stalk rot resistance derived from wild Helianthus argophyllus using a high-density SNP linkage map
                                                        

- (Peer Reviewed Journal)Talukder, Z.I., Underwood, W., Misar, C.G., Seiler, G.J., Liu, Y., Li, X., Cai, X., Qi, L. 2021. Unraveling the Sclerotinia basal stalk rot resistance derived from wild Helianthus argophyllus using a high-density SNP linkage map. Frontiers in Plant Science. https://doi.org/10.3389/fpls.2020.617920.A greenhouse method to evaluate sunflower quantitative resistance to basal stalk rot caused by Sclerotinia sclerotiorum
                                                        

- (Peer Reviewed Journal)Underwood, W., Misar, C.G., Block, C., Gulya, T.J., Talukder, Z., Hulke, B.S., Markell, S. 2020. A greenhouse method to evaluate sunflower quantitative resistance to basal stalk rot caused by Sclerotinia sclerotiorum. Plant Disease. 105:464-472. https://doi.org/10.1094/PDIS-08-19-1790-RE.Determination of virulence phenotypes of Plasmopara halstedii in the United States
                                                        

- (Peer Reviewed Journal)Gilley, M.A., Gulya, T.J., Seiler, G.J., Underwood, W., Hulke, B.S., Misar, C.G., Markell, S.G. 2020. Determination of virulence phenotypes of Plasmopara halstedii in the United States. Plant Disease. 104:2823-2831. https://doi/10.1094/PDIS-10-19-2063-RE.Genetic dissection of Phomopsis stem canker resistance in cultivated sunflower using High density SNP linkage map
                                                        

- (Peer Reviewed Journal)Talukder, Z., Underwood, W., Ma, G., Seiler, G.J., Misar, C.G., Cai, X., Qi, L. 2020. Genetic dissection of Phomopsis stem canker resistance in cultivated sunflower using High density SNP linkage map. International Journal of Molecular Sciences. https://doi.org/10.3390/ijms21041497.Registration of oilseed sunflower maintainer germplasm HA 489, with resistance to the banded sunflower moth
                                                        

- (Peer Reviewed Journal)Wronski, A.R., Prasifka, J.R., Grove, M.S., Koehler, B.D., Misar, C.G., Underwood, W., Hulke, B.S. 2020. Registration of oilseed sunflower maintainer germplasm HA 489, with resistance to the banded sunflower moth. Journal of Plant Registrations. 14:197-202. https://doi.org/10.1002/plr2.20030.Improving sunflower resistance to the necrotrophic fungal pathogens Sclerotinia and Phomopsis

- (Abstract Only)Molecular dissection of resistance gene cluster and candidate gene identification of Pl17 and Pl19 in sunflower by whole-genome resequencing
                                                        

- (Peer Reviewed Journal)Ma, G.J., Song, Q., Underwood, W., Zhang, Z.W., Fiedler, J.D., Xuehui, L., Qi, L. 2019. Molecular dissection of resistance gene cluster and candidate gene identification of Pl17 and Pl19 in sunflower by whole-genome resequencing. Scientific Reports. 9:14974. https://doi.org/10.1038/s41598-019-50394-8.PMR5, an acetylation protein at the intersection of pectin biosynthesis and defense against fungal pathogens
                                                        

- (Peer Reviewed Journal)Chiniquy, D., Underwood, W., Corwin, J., Ryan, A., Szemenyei, H., Cherk Lim, C., Stonebloom, S.H., Birdseye, D.S., Vogel, J., Kliebenstein, D., Scheller, H.V., Somerville, S. 2019. PMR5, an acetylation protein at the intersection of pectin biosynthesis and defense against fungal pathogens. Plant Journal. 100(5):1022-1035. https://doi.org/10.1111/tpj.14497.Registration of oilseed sunflower germplasms RHA 485, RHA 486, and HA 487, selected for resistance to Phomopsis stalk canker and Sclerotinia, in a high yielding and high-oil background
                                                        

- (Peer Reviewed Journal)Money, K., Koehler, B.D., Misar, C.G., Grove, M.S., Underwood, W., Hulke, B.S. 2019. Registration of oilseed sunflower germplasms RHA 485, RHA 486, and HA 487, selected for resistance to Phomopsis stalk canker and Sclerotinia, in a high yielding and high-oil background. Journal of Plant Registrations. 13(3):439-442. https://doi.org/10.3198/jpr2019.02.0008crg.Introgression and monitoring of wild Helianthus praecox alien segments associated with sclerotinia basal stalk rot resistance in sunflower using genotyping-by sequencing
                                                        

- (Peer Reviewed Journal)Talukder, Z.I., Long, Y., Seiler, G.J., Underwood, W., Qi, L. 2019. Introgression and monitoring of wild Helianthus praecox alien segments associated with Sclerotinia basal stalk rot resistance in sunflower using genotyping-by sequencing. PLoS One. 14(3):e0213065. https://doi.org/10.1371/journal.pone.0213065.Registration of oilseed sunflower germplasms HA-BSR6, HA-BSR7, and HA-BSR8 highly resistant to sclerotinia basal stalk rot and downy mildew
                                                        

- (Peer Reviewed Journal)Talukder, Z.I., Long, Y.M., Seiler, G.J., Underwood, W., Qi, L.L. 2019. Registration of oilseed sunflower germplasms HA-BSR6, HA-BSR7, and HA-BSR8 highly resistant to sclerotinia basal stalk rot and downy mildew. Journal of Plant Registrations. https://doi.org/10.3198/jpr2018.10.0071crg.Phosphorylation is required for the pathogen defense function of the Arabidopsis PEN3 ABC transporter
                                                        

- (Peer Reviewed Journal)Underwood, W., Somerville, S.C. 2017. Phosphorylation is required for the pathogen defense function of the Arabidopsis PEN3 ABC transporter. Plant Signaling and Behavior. 12(10):e1379644. https://doi.org/10.1080/15592324.2017.1379644.An Arabidopsis lipid flippase is required for timely recruitment of defenses to the host-pathogen interface at the plant cell surface

- (Peer Reviewed Journal)Underwood, W., Ryan, A., Somerville, S.C. 2017. An Arabidopsis lipid flippase is required for timely recruitment of defenses to the host-pathogen interface at the plant cell surface. Molecular Plant. 10(6):805-820.Identification of novel sources of resistance to Sclerotinia basal stalk rot in South African sunflower germplasm
                                                        

- (Peer Reviewed Journal)Seiler, G.J., Misar, C.G., Gulya, T.J., Underwood, W.R., Flett, B.C., Gilley, M.A., Markell, S.G. 2017. Identification of novel sources of resistance to Sclerotinia basal stalk rot in South African sunflower germplasm. Plant Health Progress. 18:87-90. https://doi.org/10.1094/PHP-01-17-0007-RS.Purification of high molecular weight genomic DNA from powdery mildew for long-read sequencing

- (Peer Reviewed Journal)Feehan, J.M., Schneibel, K.E., Bouras, S., Underwood, W., Keller, B.,  Somerville, S.C. 2017. Purification of high molecular weight genomic DNA from powdery mildew for long-read sequencing. Journal of Visualized Experiments. doi:10.3791/55463.Environmental factors for germination of Sclerotinia sclerotiorum sclerotia

- (Peer Reviewed Journal)Foley, M.E., Dogramaci, M., West, M.S., Underwood, W.R. 2016. Environmental factors for germination of Sclerotinia sclerotiorum sclerotia. Journal of Plant Pathology & Microbiology. doi:10.4172/2157-7471.1000379.Contributions of host cellular trafficking and organization to the outcomes of plant-pathogen interactions

- (Review Article)Underwood, W. 2016. Contributions of host cellular trafficking and organization to the outcomes of plant-pathogen interactions. Seminars in Cell and Developmental Biology. 56:163-173.A reevaluation of myceliogenic germination of sclerotia for Sclerotinia sclerotiorum strain Sun-87

- (Abstract Only)Foley, M.E., Dogramaci, M., Underwood, W. 2016. A reevaluation of myceliogenic germination of sclerotia for Sclerotinia sclerotiorum strain Sun-87. [abstract]. National Sclerotinia Initiative 2016 Annual Meeting Program Booklet, January 20-22, 2016, Bloomington, MN. p. 10.


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