SPECIES DIVERSITY AND RELATIONSHIP AMONG VIGNA RADIATA (L.) WILCZEK AND.ITS CLOSE WILD RELATIVES

The genetic variation population substructure and phylogenetic relationships between wild forms and cultigens of Vigna, statistics was calculated for all 10 loci for 390 individuals of 26 populations belonging to five Vigna species. Twenty six accessions were categorized in four groups. The percent of polymorphic loci varied from 10 to 50. The estimates for observed and effective number of alleles per locus ranged from 1.10 to 1.90 and 1.01 to 1.53, respectively. The Nei's genetic diversity estimates ranged from 0.04 to 0.25. The values for expected heterozygosity ranged from 0.01 to 0.26. The Shannon-Weaver information index values varied from 0.04 to 0.41. Inter-species variability was analyzed by computing the parameters, number of polymorphic loci, percent polymorphic loci, observed number of alleles per locus, effective number of alleles per locus, Shannon-Weaver information index, observed heterozygosity, expected heterozygosity, F-statistics and gene flow. Dendrogram based on STMS profiles indicated that V. radiata, V. radiata var. sublobata and V radiata var. setulosa are distinct taxonomic groups. Considerable gene-llow was detected between their populations.