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Inheritance of Resistance to Peanut Mottle Virus in Soybeans¹

Four soybean, Glycine max (L.) Merr., crosses between resistant and susceptible cultivars were used to study the inheritance of resistance to peanut mottle virus (PMV). From greenhouse inoculation tests performed on the F₁, F₂, and F₃ generations, resistance was shown to be conditioned by an allele at a single locus, designated as Rpv which exhibited complete dominance under the conditions of this study. These results indicated that cultivars resistant to PMV can be obtained either by screening the early segregating generations of crosses between resistant and susceptible parents or by transferring the gene for resistance through a backcrossing program into existing susceptible cultivars.

Key Words: Glycine max (L.) Merr. • Disease resistance

² Assistant professor, Dep. of Agron., and professor, Dep. of Plant Path. and Plant Genetics, College Station (Athens).

Received for publication November 14, 1975.