A New Allele (Vwf) at the V Locus for Flower and Seedcoat Color in Common Bean

Abstract

The inheritance of flower and seedcoat color was studied using Lamprecht line M0137 (PI 527845) of common bean (Phaseolus vulgaris L.) as the source of a new allele, Vwf, at the V locus. The cross M0137 cres Vwf × C v BC2 5-593 (a genetic tester stock) was studied in progeny of the F1, F2, F3, and F4 generations. The observed segregation for flower and seed colors was consistent with the hypothesis that M0137 carried a new allele, Vwf, that produced (in the presence of P C J G B) white flowers and black seeds rather than the white flowers and mineral-brown seeds produced (in the presence of P C J G B) by v. The V/Vwf genotype produced cobalt-violet flowers, the same as V/v. A test cross of F3 Vwf × t BC1 5-593 bipunctata demonstrated that Vwf is not allelic with t, a gene that can produce white or colored flowers and self-colored or partly colored seeds, depending on background genotype.