GENETIC ARCHITECTURE OF YIELD TRAITS IN ADZUKI BEAN (VIGNA ANGULARIS (WILLD) OHWI and OASH!)

Abstract

Genetic components of variance were estimated following triple test cross analysis involving 22 pure breeding lines derived from an intervarietal cross (A 1 X HPU 51) of adzuki bean for seed yield, clusters, and pods per plant, pod length, seeds/pod and biological yield/plant. Epistasis was an integral component of genetic variation for all the traits studied. Overall epistasis (i type) was a major component in the cases where all the three types of epistatic interactions were present. Both additive and nonadditive genetic variances were important for most of the traits. Ambidirectional dominance was operative for all the traits except for pods and biological yield/plant for which decreasing alleles were more often dominant than the increasing alleles.