Fri - August 26, 2016
by Brian Diers, Soybean Breeder, University of Illinois, and Thomas Baum, Soybean Nematologist, Iowa State University
Although SCN-resistant soybean varieties are available to minimize yield loss to soybean cyst nematode (SCN), over 90% of the varieties available to growers in the north-central United States have the soybean line PI 88788 as the genetic source of resistance. The effectiveness of PI 88788 resistance has decreased over time as nematodes have adapted to this type of resistance. Producers are faced with limited options for rotation once virulent SCN populations develop in their fields.
To provide farmers with effective and durable rotation schemes, we have identified seven genes from five soybean lines, including wild soybean (Glycine soja
), and are using them to develop lines with new combinations of SCN resistance genes.