Soybean Germplasm Resistant To Race-3, Race-5, Or Race-14 Of Soybean Cyst-Nematode

Soybean, Glycine maw (L.) Merr., accessions added to the U.S. soybean germplasm collection since 1980 were evaluated for reaction to Races 3, 5, and 14 of the soybean cyst nematode, Heterodera glycines Ichinohe. Accessions were evaluated in the greenhouse by inoculation with approximately 1000 H. glycines eggs and enumeration of females developing on roots 35 d after planting. Nineteen accessions were resistant to Race 3, 11 accessions were resistant to Race 5, and two accessions were resistant to Race 14. The PI 467312 was resistant to all three races. These resistant accessions may contain new genes for resistance to this nematode.