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Registration of Stout‐ Rps 1k Soybean Germplasm Line
Author(s) -
Mian M. A. Rouf,
Cooper Richard L.,
Dorrance Anne E.
Publication year - 2008
Publication title -
journal of plant registrations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.316
H-Index - 21
eISSN - 1940-3496
pISSN - 1936-5209
DOI - 10.3198/jpr2007.11.0620crg
Subject(s) - germplasm , biology , phytophthora sojae , cultivar , backcrossing , stem rot , root rot , horticulture , gene , agronomy , phytophthora , botany , genetics
Stout‐ Rps 1k soybean [ Glycine max (L.) Merr.]) (Reg. No. GP‐360, PI 644024) germplasm line was developed jointly by the USDA‐ARS and the Ohio Agricultural Research and Development Center in Wooster, OH. It was released in October 2006 because it had the Rps 1k gene for race‐specific resistance to Phytophthora root and stem rot (caused by Phytophthora sojae, M.J. Kaufmann and J.W. Gerdemann) in the semidwarf cultivar Stout. Stout‐ Rps 1k, a maturity group III (RM 3.3) germplasm, was developed by backcrossing the Rps 1k gene from cultivar Sprite 87 into Stout. BC 5 –derived lines homozygous for the Rps 1k gene were bulked and evaluated for agronomic performance in local and regional tests. Agronomic performance of Stout‐ Rps 1k was similar to the recurrent parent Stout. The Rps 1k gene conditions resistance against a wider range of P. sojae populations in the north‐central soybean growing region of the United States than the Rps 1a gene. Thus, Stout‐ Rps 1k should be useful for breeders and researchers interested in developing new soybean lines with broad resistance to P. sojae populations and specific adaptation to high‐yield environments.