Induced variability of resistance to root-knot nematodes (M̲e̲ḻo̲i̲ḏo̲g̲ṉy̲ṉe̲ i̲ṉc̲o̲g̲ṉi̲ṯa̲) in soybeans (G̲ḻy̲c̲e̲ṟi̲ṉe̲ m̲a̲x̲) /

The purpose of this study was to determine the variability of resistance to root-knot nematodes (Meloidogyne incognita) in soybeans (Glycine max) induced by seed. treatment with ethylmethane sulfonate (EMS). Two soybean varieties, 'Essex' and 'Forrest,' were chosen as the experimental materials mainly on the basis of their distinct level of resistance; 'Essex' is susceptible and 'Forrest' is resistant. The M2 and control populations were grown and tested for nematode resistance in the greenhouse. The number of galls developed on the roots was used to indicate the level of resistance.