Abstract
In order to understand the phylogenetic relationships of azuki bean (Vigna angularis ) and its related species, isozyme variation of nine taxa belonging to the subgenus Ceratotropis (genus Vigna : Fabaceae) and two outgroup species (V. unguiculata. V. vexillata ) was evaluated us-ing twelve enzyme systems. Isozyme variation among accessions in each species was very low. An UPGMA phenogram indicated the occurrence of three distinct groups of species in the subgenus Ceratotropis. The first group consisted of three races of azuki bean. The second group consisted of V. nakashimae. V. minima var.
