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United States Department of Agriculture

Agricultural Research Service

Related Topics

David R Walker
Soybean/maize Germplasm, Pathology, and Genetics Research
Genetics

Phone: (217) 244-1274
Fax: (217) 244-7703
Room 232

1101 WEST PEABODY
URBANA , IL 61801

Projects
IMPROVED RESISTANCE TO SOYBEAN PATHOGENS AND PESTS
Appropriated (D)
  Accession Number: 422909
SOYBEAN GERMPLASM EVALUATION FOR RESISTANCE TO SOYBEAN RUST AND OTHER IMPORTANT DISEASES
Specific Cooperative Agreement (S)
  Accession Number: 423189

Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Reaction of Diaporthe longicolla to a strain of Sarocladium kiliense -
Divilov, K., Walker, D.R. 2016. Reaction of Diaporthe longicolla to a strain of Sarocladium kiliense. Biocontrol Science and Technology. 26(7):938-950.
Identification of a soybean rust resistance gene in PI 567104B Reprint Icon -
Liu, M., Li, S., Swaminathan, S., Sahu, B., Leandro, L., Cardinal, A., Bhattacharyya, M., Song, Q., Walker, D.R., Cianzio, S.R. 2016. Identification of a soybean rust resistance gene in PI 567104B. Theoretical and Applied Genetics. 129:863-877.
Resistance to Phakopsora pachyrhizi in soybean PI 587905 maps to the Rpp1 locus and exhibits variable dominance associated with plant ontogeny. -
Smith, J.R., Ray, J.D., Morel, W., Frederick, R.D., Walker, D.R. 2015. Resistance to Phakopsora pachyrhizi in soybean PI 587905 maps to the Rpp1 locus and exhibits variable dominance associated with plant ontogeny.. Journal of Crop Improvement. 29:581-601.
From select agent to established pathogen: The response to Phakopsora pachyrhizi (soybean rust) in North America Reprint Icon -
Kelly, H.Y., Dufault, N.S., Walker, D.R., Isard, S.A., Schneider, R.W., Giesler, L.J., Wright, D.L., Marois, J.J., Hartman, G.L. 2015. From select agent to established pathogen: The response to Phakopsora pachyrhizi (soybean rust) in North America. Phytopathology. 105(7):905-916.
Identification of unique genetic sources of soybean rust resistance from the USDA germplasm collection -
Harris, D.K., Kendrick, M.D., King, Z.R., Pedley, K.F., Walker, D.R., Cregan, P.B., Buck, J.W., Phillips, D.V., Li, Z., Boerma, H. 2015. Identification of unique genetic sources of soybean rust resistance from the USDA germplasm collection. Crop Science. DOI: 10.2135/cropsci2014.09.0671.
Comparison of pathogenic variation among Phakopsora pachyrhizi isolates collected from the United States and International Locations, and identification of Soybean genotypes resistant to the United States isolates Reprint Icon -
Paul, C., Frederick, R.D., Hill, C.B., Hartman, G.L., Walker, D.R. 2015. Comparison of pathogenic variation among Phakopsora pachyrhizi isolates collected from the United States and International Locations, and identification of Soybean genotypes resistant to the United States isolates. Plant Disease. 99(8): 1059-1069.
Development of soybean with novel sources of resistance to Phomopsis seed decay -
Li, S., Chen, P., Walker, D.R., Rupe, J. 2014. Development of soybean with novel sources of resistance to Phomopsis seed decay. Phytopathology. American Phytopathologu Soceity, August 9 - 13, 2014, Minneapolis, MN.
Evaluation of soybean germplasm accessions for resistance to Phakopsora pachyrhizi populations in the southeastern United States, 2009-2012 Reprint Icon -
Walker, D.R., Harris, D.K., King, Z.R., Li, Z., Boerma, H.R., Buckley, J.B., Weaver, D.B., Sikora, E.J., Shipe, E.R., Mueller, J.D., Nelson, R.L. 2014. Evaluation of soybean germplasm accessions for resistance to Phakopsora pachyrhizi populations in the southeastern United States, 2009-2012. Crop Science. 54(4):1673-1689.
Soybean germplasm accession seedling reactions to soybean rust isolates from Georgia Reprint Icon -
Walker, D.R., Harris, D.K., King, Z.R., Li, Z., Phillips, D.V., Buck, J.W., Nelson, R.L., Boerma, H.R. 2014. Soybean germplasm accession seedling reactions to soybean rust isolates from Georgia. Crop Science. 54(4):1433-1447.
Identification of fungi on diseased soybean seeds harvested during a high rainfall period in Mato Grosso do Sul, Brazil Reprint Icon -
Cortina, J.V., Theodoro, G., Walker, D.R. 2013. Identification of fungi on diseased soybean seeds harvested during a high rainfall period in Mato Grosso do Sul, Brazil. Bioscience Journal. 29:386-391.
First report of Phakopsora pachyrhizi adapting to soybean genotypes with Rpp1 or Rpp6 rust resistance genes in field plots in the United States -
Paul, C., Hartman, G.L., Marois, J., Wright, D., Walker, D.R. 2013. First report of Phakopsora pachyrhizi adapting to soybean genotypes with Rpp1 or Rpp6 rust resistance genes in field plots in the United States. Plant Disease. 97:1379.
Research highlights on breeding for soybean disease resistance in the United States -
Li, S., Chen, P., Walker, D.R. 2013. Research highlights on breeding for soybean disease resistance in the United States. International Congress of Plant Pathology Abstracts and Proceedings. 43:98-99.
Pathogenic diversity of Phytophthora sojae and breeding strategies to develop Phytophthora-resistant soybeans -
Sugimoto, T., Yoshida, S., Kato, M., Kaga, A., Hajika, M., Watanabe, K., Masataka, A., Matoh, T., Walker, D.R., Biggs, A.R., Ishimoto, M. 2012. Pathogenic diversity of Phytophthora sojae and breeding strategies to develop Phytophthora-resistant soybeans. Journal of Breeding Science. 61:511-522.
Genetic analysis and identification of DNA markers linked to a novel Phytophthora sojae resistance gene in the Japanese soybean cultivar Waseshiroge Reprint Icon -
Sugimoto, T., Yoshida, S., Kaga, A., Hajika, M., Watanabe, K., Aino, M., Tatsuda, K., Yamamoto, R., Matoh, T., Walker, D.R., Biggs, A.R., Ishimoto, M. 2011. Genetic analysis and identification of DNA markers linked to a novel Phytophthora sojae resistance gene in the Japanese soybean cultivar Waseshiroge. Euphytica. 182:133–145. DOI: 10.1007/s10681-011-0525-8p.
Differences in responses and protein profiles of soybean Near Isogenic Lines (NILs) to Phakopsora pachyrhizi inoculation -
Ganiger, M., Walker, D.R., Chen, Z. 2011. Differences in responses and protein profiles of soybean Near Isogenic Lines (NILs) to Phakopsora pachyrhizi inoculation [abstract]. American Phytopathological Society, International Plant Protection Congress Joint Meeting, August 6-10, 2011, Honolulu, Hawaii. 2011 CD ROM.
Genetic resistance to soybean rust in PI 567099A is at or near the Rpp3 locus -
Ray, J.D., Smith, J.R., Morel, W., Bogado, N., Walker, D.R. 2011. Genetic resistance to soybean rust in PI 567099A is at or near the Rpp3 locus. Journal of Crop Improvement. 25(3):219-231.
Saccharin-induced systemic acquired resistance against rust (Phakopsora pachyrhizi) infection in soybean: Effects on growth and development Reprint Icon -
Srivastava, P., George, S., Marois, J.J., Wright, D.L., Walker, D.R. 2011. Saccharin-induced systemic acquired resistance against rust (Phakopsora pachyrhizi) infection in soybean: Effects on growth and development. Crop Protection. 30(6):726-732.
Evaluation of USDA soybean germplasm accessions for resistance to soybean rust in the southern United States -
Walker, D.R., Boerma, H.R., Harris, D.K., Phillips, D.V., Schneider, R.W., Hartman, G.L., Miles, M.R., Weaver, D.B., Sikora, E.J., Moore, S.H., Buckley, J.B., Shipe, E.R., Mueller, J.D., Wright, D.L., Marois, J.J., Nelson, R.L. 2011. Evaluation of USDA soybean germplasm accessions for resistance to soybean rust in the southern United States. Crop Science. 51:678-693.
Age-Dependent Variations in Systemic Defense Responses of Soybean Plants towards Soybean Rust Caused by Phakopsora pachyrhizi -
Walker, D.R., George, G., Marois, J.J., Wright, D.L. 2010. Age-Dependent Variations in Systemic Defense Responses of Soybean Plants towards Soybean Rust Caused by Phakopsora pachyrhizi [abstract]. 13th Biennial Molecular & Cellular Biology of the Soybean Conference 2010. http://www.ncsu.edu/project/OPDWebSpace/MCBSpdfs/281.pdf.
Saccharin-Mediated Systemic Protection of Soybean Against Infection by Soybean Rust -
Srivastava, P., George, S., Marois, J., Wright, D., Walker, D.R. 2010. Saccharin-Mediated Systemic Protection of Soybean Against Infection by Soybean Rust [abstract]. American Phytopathological Society Annual Meeting, August 7-11,2010, Nashville, TN. Phytopathology 100:S122.
Evaluations of Soybean Germplasm Accessions and F5 Recombinant Inbred Lines for Resistance to Phakopsora pachyrhizi -
Srivastava, P., Walker, D.R., George, S., Marois, J., Wright, D. 2009. Evaluations of Soybean Germplasm Accessions and F5 Recombinant Inbred Lines for Resistance to Phakopsora pachyrhizi [abstract]. In: Proceedings of the National Soybean Rust Symposium, December 9-11, 2009, New Orleans, LA. p. 19.
Tolerance to Soybean Rust in Cultivars from Southeastern U.S. Public Soybean Breeding Programs -
Walker, D.R., Srivastava, P., Marois, J.J., Wright, D.L. 2009. Tolerance to Soybean Rust in Cultivars from Southeastern U.S. Public Soybean Breeding Programs [abstract]. In: Proceedings of the National Soybean Rust Symposium, December 9-11, 2009, New Orleans, LA. P. 21.
Identification and Development of Soybean Rust-Resistant Germplasm Reprint Icon -
Walker, D.R. 2009. Identification and Development of Soybean Rust-Resistant Germplasm [abstract]. In: Proceedings of the National Soybean Rust Symposium, December 9-11, 2009, New Orleans, LA.
Changes in Susceptibility to Soybean Rust Caused by Phakopsora pachyrhizi Associated with Plant Age and Leaf Node Position -
Srivastava, P., Marois, M., Wright, D., Walker, D.R., Leandro, L. 2009. Changes in Susceptibility to Soybean Rust Caused by Phakopsora pachyrhizi Associated with Plant Age and Leaf Node Position [abstract]. In: Proceedings of the National Soybean Rust Symposium, December 9-11, 2009, New Orleans, LA. p. 5.
Characterization of Variation in Soybean Germplasm Accession Reactions to Soybean Rust (Phakopsora pachyrhizi) Reprint Icon -
Walker, D.R., Srivastava, P., Marois, J.J., Wright, D.L., Nelson, R.L. 2009. Characterization of Variation in Soybean Germplasm Accession Reactions to Soybean Rust (Phakopsora pachyrhizi)[abstract]. In: Proceedings of the World Soybean Research Conference VIII, August 9-16, 2009, Beijing, China. Available: www.wsrc2009.cn/en/index.asp.
Confirmation of Molecular Markers and Agronomic Traits Associated with Seed Phytate Content in Two Soybean RIL Populations Reprint Icon -
Scaboo, A.M., Pantalone, V.R., Walker, D.R., West, D.R., Walker, F.R., Sams, C.E., Boerma, H. 2009. Confirmation of Molecular Markers and Agronomic Traits Associated with Seed Phytate Content in Two Soybean RIL Populations. Crop Science. 49:426-432.
The Effect of Potassium Nitrate on the Reduction of Phytophthora Stem Rot Disease of Soybeans, the Growth Rate and Zoospore Release of Phytophthora Sojae -
Sugimoto, T., Watanabe, K., Furiki, M., Walker, D.R., Yoshida, S., Aino, M., Kanto, T., Irie, K. 2009. The Effect of Potassium Nitrate on the Reduction of Phytophthora Stem Rot Disease of Soybeans, the Growth Rate and Zoospore Release of Phytophthora sojae. Journal of Phytopathology. 157:379-389.
Marker-Assisted Selection in Soybean Breeding -
Walker, D.R., Monteros, M.J., Yates, J.L. 2010. Marker-Assisted Selection in Soybean Breeding. In: Bilyeu, K., Ratnaparkhe, M.B. and Kole, C. editors. Genetics, Genomics and Breeding of Soybean. Enfield, New Hampshire: Science Publishers. p. 123-167.
Evaluation of soybean germplasm accessions to soybean rust in the southeastern United States and efforts to develop rust-resistant lines -
Walker, D.R., Nelson, R.L., Hartman, G.L., Buckley, J., Moore, S.H., Schneider, R.W., Weaver, D.B., Shipe, E.R., Mueller, J.D., Boerma, H. 2008. Evaluation of soybean germplasm accessions to soybean rust in the southeastern United States and efforts to develop rust-resistant lines. [Abstract]. International Crop Science Congress Proceedings, April 13-18, 2008, Jeju, Korea. Abstract #1532.
Variation in Lesion Characteristics, Densities and Sporulation Levels Among Soybean Germplasm Accessions Resistant to Soybean Rust (Phakopsora Pachyrhizi) -
Walker, D.R., Pauls, M.K., Wright, D.L., Marois, J.J., Nelson, R.L., Narvaez, D.F. 2008. Variation in Lesion Characteristics, Densities and Sporulation Levels Among Soybean Germplasm Accessions Resistant to Soybean Rust (Phakopsora Pachyrhizi) [abstract]. American Society of Agronomy 2008 Joint Meeting, October 5-9, 2008, Houston, Texas. 2008 CDROM.
Variation in Soybean Rust Reaction Response in a Set of Resistant Germplasm Accessions -
Walker, D.R., Narvaez, D., Marois, J.J., Wright, D.L. 2008. Variation in Soybean Rust Reaction Response in a Set of Resistant Germplasm Accessions. 12th Biennial Conference on Molecular and Cellular Biology of the Soybean, July 20-23, 2008, Indianapolis, Indiana. 2008 CDROM.
Identification and characterization of soybean rust resistance in Plant Introductions from the USDA’s soybean germplasm collection -
Walker, D.R., Nelson, R.L., Hartman, G.L., Buckley, B., Moore, S., Schneider, R.W., Weaver, D., Shipe, E., Mueller, J., Boerma, H. 2008. Identification and characterization of soybean rust resistance in Plant Introductions from the USDA’s soybean germplasm collection [abstract]. 2008 American Phytopathological Society Annual Meeting. July 26-30, 2008. Minneapolis, MN. p. 98:S195.
Evaluation of soybean germplasm collections for disease reaction and prospects for development of disease resistant varieties -
Walker, D.R. 2007. Evaluation of soybean germplasm collections for disease reaction and prospects for development of disease resistant varieties. 2007 National Soybean Rust Symposium. December 12-14, 2007. Louisville, KY. pp. 1-31.
Effects of Defoliating Insect Resistance QTLs and a crylAc Transgene in Soybean Near-Isogenic Lines -
Zhu, S., Walker, D.R., Boerma, H.R., All, J.N., Parrott, W.A. 2007. Effects of Defoliating Insect Resistance QTLs and a crylAc Transgene in Soybean Near-Isogenic Lines. Theoretical and Applied Genetics. 16:455-463.
Frogeye Leaf Spot of Soybean: A Review and Proposed Race Designations for Isolates of Cercospora Sojina Hara Reprint Icon -
Mian, R.M., Missaoui, A.M., Walker, D.R., Phillips, D.V., Boerma, H.R. 2008. Frogeye Leaf Spot of Soybean: A Review and Proposed Race Designations for Isolates of Cercospora Sojina Hara. Crop Science. 48:14-24.
Association analysis using SSR markers to identify QTL for seed protein content in soybeans Reprint Icon -
Jun, T., Van, K., Kim, M., Lee, S., Walker, D.R. 2008. Association analysis using SSR markers to identify QTL for seed protein content in soybeans. Euphytica. 162:179-191.
Registration of five soybean germplasm lines selected within the cultivar ‘Benning’ differing in seed and agronomic traits Reprint Icon -
Fasoula, V.A., Boerma, H., Yates, J.L., Walker, D.R., Finnerty, S.L., Rowan, G.B., Wood, E. 2007. Registration of five soybean germplasm lines selected within the cultivar ‘Benning’ differing in seed and agronomic traits. Journal of Plant Registrations. 1:156-157.
Registration of seven soybean germplasm lines selected within the cultivar ‘Cook’ differing in seed and agronomic traits Reprint Icon -
Fasoula, V.A., Boerma, H., Yates, J.L., Walker, D.R., Finnerty, S.L., Rowan, G.B., Wood, E. 2007. Registration of seven soybean germplasm lines selected within the cultivar ‘Cook’ differing in seed and agronomic traits. Journal of Plant Registrations. 1:158-159.
Registration of six soybean germplasm lines selected within the cultivar ‘Haskell’ differing in seed and agronomic traits Reprint Icon -
Fasoula, V.A., Boerma, H., Yates, J.L., Walker, D.R., Finnerty, S.L., Rowan, G.B., Wood, E. 2007. Registration of six soybean germplasm lines selected within the cultivar ‘Haskell’ differing in seed and agronomic traits. Journal of Plant Registrations. 1:160-161.
Registration of four soybean germplasm lines containing defoliating insect resistance QTLS from PI 229358 introgressed into 'Benning' -
Zhu, S., Walker, D.R., Warrington, C.V., Parrott, W.A., All, J.N., Wood, E.D., Boerma, H.R. 2007. Registration of four soybean germplasm lines containing defoliating insect resistance QTLS from PI 229358 introgressed into 'Benning'. Journal of Plant Registrations. 1:162-163.
Mapping and confirmation of the ‘Hyuuga’ red-brown lesion resistance gene for Asian soybean rust -
Monteros, M.J., Missaoui, A., Phillips, D.V., Walker, D.R., Boerma, H.R. 2007. Mapping and confirmation of the ‘Hyuuga’ red-brown lesion resistance gene for Asian soybean rust. Crop Science.47(2):829-836 Mar-Apr 2007
Genomics of Insect-Soybean Interactions -
Parrott, W., Walker, D.R., Zhu, S., Boerma, H., All, J. 2008. Genomics of Insect-Soybean Interactions. In: G. Stacey (ed.) Genetics and Genomics of Soybean. New York, NY: Springer. p. 269-291.
Sensitivity of soybean plant introductions to the foliar fungicide tebuconazole (Folicur) -
Jarrett, S., Bradley, C., Walker, D.R. 2007. Sensitivity of soybean plant introductions to the foliar fungicide tebuconazole (Folicur) [abstract]. American Society of Agronomy Abstracts. Paper No. 11-9.
Strategies for identifying and capturing resistance to Asian soybean rust -
Walker, D.R. 2007. Strategies for identifying and capturing resistance to Asian soybean rust. American Society of Agronomy Abstracts. Paper No. 333-2.
Evaluations of soybean accessions for resistance to soybean rust in the United States -
Walker, D.R., Nelson, R.L., Hartman, G.L., Miles, M.R., Schneider, R.W., Moore, S.H., Weaver, D.B., Shipe, E.R., Mueller, J.D., Boerma, H. Evaluations of soybean accessions for resistance to soybean rust in the United States. American Society of Agronomy Abstracts. Paper No. 258-7.
Screening US Soybean Germplasm for Rust Resistance -
Vuong, T.D., Pham, A.T., Nguyen, B.T., Hartman, G.L., Miles, M.R., Frederick, R.D., Sleper, D.A., Shannon, J., Walker, D.R., Nguyen, H.T. 2006. Screening US Soybean Germplasm for Rust Resistance. In: Proceedings of the American Seed Trade Association Conference, December 5-8, 2006, Chicago, Illinois. 2007 CDROM.
Investigation of possible soybean genotype × fungicide application rate interactions in Asian soybean rust severity -
Walker, D.R., Mueller, T.A., Marois, J.J., Wright, D.L. 2006. Investigation of possible soybean genotype × fungicide application rate interactions in Asian soybean rust severity. National Soybean Rust Symposium.( abstract)
RESPONSE OF LOW SEED PHYTIC ACID SOYBEANS TO INCREASES IN EXTERNAL P SUPPLY -
Israel, D.W., Kwanyuen, P., Burton, J.W., Walker, D.R. 2007. Response of low seed phytic acid soybeans to increases in external P supply. Crop Sci. 47: 2036-2046.
Last Modified: 5/2/2016
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