Morphological, cytological and peroxidase isozyme studies in diploids, hybrids and amphidiploids of Vigna radiata and V. mungo

Amphidiploids were developed from F₁ hybrids of Vigna radiata and V. mungo, which showed better performance for most of morphological traits compared with F₁s but not their parents. Better seed set in amphidiploids seems to have resulted from increase in bivalent formation and increased normal disjunction. The codominant expression of species-specific isoperoxidases was observed in interspecific hybrids and amphidiploids. The isoperoxidases can, therefore, be used as markers for the identification of hybrids and amphidiploids.