Soybean cyst nematode (SCN) is a destructive pathogen of soybean. Use of SCN-resistant cultivars is the main method to manage the nematode. The SCN resistance in most current commercial cultivars is from the germplasm line PI 88788, and only a few from Peking. Use of resistant cultivars will place a selection pressure on the nematode and result in SCN populations that can eventually overcome the resistance. Most of SCN populations in MN have changed to HG Type 2- (race 1) that can overcome resistance from PI 88788. For effective long-term SCN management, an integrated program with multiple strategies is needed, and diversified SCN-resistant genes in soybean cultivars are essential....
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