Genetic divergence in parwal (Trichosanthes dioica Roxb.)

The genetic divergence in 23 genotypes of parwal has been assessed utilizing generalised distance and cannonical analysis. The 23 genotypes fell into six clusters. Two cannonical vectors needed to be considered to account for about 82% of variation. Geographical isolation has not contributed to the genetic divergence. The observed genetic divergence therefore seems to be possibly due to phenotypic differences in genotypes background. The inter-cluster divergence was maximum in cluster III, where as inter-cluster distance was maximum between cluster I and II. Fruit volume followed by pulp weight and seed weight appeared to contribute maximum to genetic divergence. Genetic drift and selection in different environments seem to cause greater genetic diversity rather than genetic isolation.