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ARS Home » Midwest Area » Urbana, Illinois » Soybean/maize Germplasm, Pathology, and Genetics Research » Research » Publications at this Location » Publication #183462
Title: EVALUATION OF SOYBEAN GERMPLASM FOR RESISTANCE TO PHAKOPSORA PACHYRHIZI

Author
item Miles, Monte
item Frederick, Reid
item Hartman, Glen

Submitted to: Plant Health Progress
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 11/5/2005
Publication Date: 1/1/2006
Citation: Miles, M.R., Frederick, R.D., Hartman, G.L. 2006. Evaluation of soybean germplasm for resistance to Phakopsora pachyrhizi. Plant Health Progress. doi 10.1094/PHP-2006-0104-01-RS.

Interpretive Summary: Soybean rust, Phakopsora pachyrhizi, may drastically reduce yields and/or increase production costs for U.S. producers. Yield losses in some countries in Africa, Asia, and South America have been significant. Since the report of soybean rust in Hawaii in 1994, the USDA-ARS has renewed its support for soybean rust research. The USDA-ARS FDWSRU at Ft. Detrick, Frederick, MD has been the focal point of identifying resistant soybean germplasm. There are over 16,000 soybean accessions in the USDA Germplasm Collection located at the University of Illinois. These soybean accessions were evaluated for resistance to P. pachyrhizi in the FDWSRU Biosafety Level 3 containment greenhouses. The objectives of these evaluations were to identify accessions that may provide new sources of resistance. These sources have the potential to provide useful genes for combating rust in growers’ fields once incorporated into commercial soybean cultivars. This information will be most useful to soybean researchers that are interested in sources of resistance to soybean rust.

Technical Abstract: Soybean (Glycine max) production in the United States may drastically be affected by Phakopsora pachyrhizi, the causal fungus of soybean rust, which was discovered in the continental U.S. in 2004. One objective of the USDA-ARS research on soybean rust was to identify resistant soybean germplasm. There are over 16,000 soybean accessions in the USDA Germplasm Collection located at the University of Illinois. As part of a research project funded by the United Soybean Board, these soybean accessions were evaluated for resistance to P. pachyrhizi in the USDA-ARS Foreign Disease-Weed Science Research Unit (FDWSRU) Biosafety Level 3 containment greenhouses. Out of 16,595 accessions, 3,215 were selected for a second round of evaluation. Of those, 805 accessions were selected as potential resistant sources for further evaluations. These sources have the potential to provide useful genes for combating rust in growers’ fields once incorporated into commercial soybean cultivars.