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Registration of Strong-Rps1k Soybean Germplasm Line
Strong-Rps1k (Reg. No. GP-359, PI 644025) soybean [Glycine max (L.) Merr.] germplasm line was developed jointly by the USDA-ARS and The Ohio Agricultural Research and Development Center (OARDC) at Wooster, OH. It was released because it carried the Rps1k gene for race specific resistance to Phytophthora root and stem rot (caused by Phytophthora sojae Kaufmann & Gerdemann) in the semidwarf background of cultivar Strong. Strong, which has the Rps1a gene, is well known for its adaptation to high yield environments where excessive vegetative growth and early lodging limit the yield potential of taller indeterminate soybean cultivars. Strong-Rps1k was developed by backcrossing the Rps1k gene from cultivar Sprite 87 into Strong. Seeds from the BC5F2:3 plants homozygous for the Rps1k gene were bulked to make Strong-Rps1k. It was evaluated for agronomic performance in local and regional tests. Performance of Strong-Rps1k was comparable to that of Strong. The Rps1k gene provides resistance against a wider range the P. sojae populations that are present in the North-Central U.S. soybean-growing region than does the Rps1a gene. Thus, Strong-Rps1k may be useful for breeders and researchers interested in developing new germplasm with resistance to Phytophthora root and stem rot with specific adaptation to high-yielding environments.
Mian, M.A. Rouf
Cooper, Richard L.
Dorrance, Anne E.
plant genetic resources
plant pathogenic fungi
Journal of plant registrations 2008 May, v. 2, no. 2
Journal Articles, USDA Authors, Peer-Reviewed
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