Differentiating soybean responses to H. glycines races

Reference Report for cyst_ref3

Title:	Differentiating soybean responses to H. glycines races
Authors:	Schmitt, D.P., Shannon, G.
Source:	Crop Sci. 1992, 32(1):275-277
Abstract:	Physiological variation among populations of Heterodera glycines Ichinohe, the soybean cyst nematode, has been a problem for soybean [Glycine max (L.) Merr.] growers and scientists. These populations have been classified into 16 races, but the system still leaves ambiguity, especially in the characterization of resistance. Two schemes are proposed: one to classify the nematoder aces and the other to designate the soybean response to the nematode. The existing race system by Riggs and Schmitt still serves as a basis for differentiating populations of H. glycines, but with soybean PI 437654 added as an additional nematode response parameter. A practical system using a popular resistant cultivar as the type for resistance is proposed for advisory purposes. Soybean reactions to parasitism by the nematode are denoted by four levels of resistance: resistant, moderately resistant, moderately susceptible, and susceptible.

Funded by the USDA-ARS. Developed by the USDA-ARS SoyBase and Legume Clade Database group at the Iowa State University, Ames, IA

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