The researchers have evaluated over 300 early maturing soybean germplasm lines from the MSU soybean breeding program for SDS resistance in both artificially inoculated fields and natural heavy SDS infection sites. Ten lines that showed SDS resistance in multiple locations were entered in Maturity Group II test of the 2010 SDS Regional Tests. Two lines, GD2422 and E07080, were as resistant as the three SDS resistant checks at all locations where SDS disease data were collected. Both lines are not known to carry any SDS resistance genes and are considered new sources of SDS resistance. In 2011, the 243 lines that are segregating for SDS resistance from GD2422 were evaluated for SDS resistance...
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