Abstract

                                The present investigation was to study the genetic divergence among the three species of Vigna viz., V.radiata, V.mungo and V.unguiculata based on biometrical, crossability and biochemical means. Biometrical study revealed that the genotype of the three species resolved into distinct clusters and remained exclusive of the other species. Canonical analysis grouping supported the pattern arrived by D statistics indicating that 100 seed weight, pod length and seed yield are the potent characters causing divergence among the three species. Crossability studies revealed that the cross between V.radiata and V.mungo was successful and its reciprocal was a failure indicating one way compatability. The protein pattern showed striking similarity between the three species yet there were some bands which were unique in each of the species that may be well utilized as genetic markers for detection of interspecific cross. The hybrids between V.radiata and V.mungo showed low pollen and seed fertility. Though the hybrid showed sterility and breakdown in F2, there is ample scope to transfer useful characters of V.mungo to V.radiata.

Key words : Vigna species, Biometrical, Crossbility Studies, Biochemical Relationship.