Soybean Germplasm Resistant to Races 1 and 2 of Heterodera gly cities

摘要

In the United States, H. glycines is the primary cyst nematode and is a most serious pest of soybean [Glycine max (L.) Merr.]. Several accessions were evaluated from soybean germplasm collections for resistance to this pest (Anand et. al. 1985; Ross and Brim, 1957; Rao Arelli et. al. 1992; Young, 1990, 1995; Nelson et. al. 1994). As of today, 118 resistant accessions are identified and these are primarily resistant to races 3, 5, and 14. Some of the data on their reaction to races 5 and 14 are inconclusive. Additionally, we have extremely very little available information on their reaction to races 1 and 2. The objective of this research was to initially bioassay 86 resistant accessions for reaction to H. glycines races 1 and 2 and also to reexamine them for other races.