Submitted to: Soybean Genetics Newsletter
Publication Type: Abstract Only
Publication Acceptance Date: 8/10/1999
Publication Date: N/A
Technical Abstract: Phytophthora root rot of soybean can cause heavy crop losses. Monogenic race-specific resistance to the causal organism, Phytophthora sojae, is controlled by 13 dominant alleles at seven loci in soybean. Soybean germplasm lines have been identified with new race resistance patterns. These lines need to be characterized to determine the inheritance of that resistance and compared to known sources of resistance. The objective of this study was to characterize the inheritance of resistance to P. sojae in PI 567574A. Results indicate that there are two alleles at independent loci that control resistance in this PI. Allelism studies indicated that the two alleles are Rps1c and Rps3a.