A Second Dominant Gene for Resistance to Peanut Mottle Virus in Soybeans
1985
Buss, G. R. | Roane, C. W. | Tolin, S. A. | Vinardi, T. A.
The soybean [Glycine max (L.) Merr.] cultivars ‘Arksoy ’. ‘Dorman ’, ‘York ’, ‘Shore ’, and ‘CNS ’ each contain a single dominant gene for resistance to peanut mottle virus (PMV). Crosses were made among these cultivars and F₃ progenies of individual F₂ plants were inoculated with PMV. The degree and type of segregation that occurred was used to determine the allelic relationship among the genes in these cultivars. This information is valuable to soybean breeders wishing to incorproate PMV resistance into breeding lines. Segregation was not observed in crosses among Arksoy, Dorman, York and Shore. It was concluded that they contain the previously reported Rpv₁ gene for PMV resistance. Crosses of CNS with Dorman, Shore, and York segregated for PMV reaction. The data provided a good fit to the ratio expected from two dominant genes segregating independently. Assignment of a symbol for the CNS gene is being postponed until its allelic relationship with rpv₂ in ‘Peking’ is determined. No evidence for linkage was found between the two dominant genes for PMV resistance or between them and the pubescence color gene, T-t.
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