Abstract
Thirty one genotypes of mungbean (Vigna radiata L. Wilczek) were evaluated to estimate the variation based on the difference of quantitative characters. All genotypes that are significantly differed with these characters were belonged 6 groups (Clusters I to VI) by principal component analysis. The components of each clusters were varied from 1 to 9 genotypes. Cluster VI comprised of 9 genotypes, followed by cluster IV consisting of 8 genotypes and cluster V consisting of 6 genotypes. However, there were existed at 4 genotypes in clusters I, 3 genotypes in cluster II and 1 genotypes in cluster III, respectively. Maximum intracluster distance was observed in Cluster IV (9.28), followed by Cluster VI (8.70) indicating the wide genetic variability within the genotypes belonging to the two clusters. By evaluating the intercluster distance, the maximum value was obtained between Clusters I and III at the value of 27.60, followed by cluster II and III (25.95) indicating maximum diversity between the genotypes belonging to the two clusters. The minimum intercluster distance between Clusters II and VI (5.24) indicated that the genotypes of these clusters were genetically the least diverse genotype and almost of the same genetic architecture. Cluster III exhibited the highest mean value for nodes of 1st peduncle, cluster per plant, cluster on main stem, cluster on branches, primary branches per plant and pods per plant. Whereas cluster I had the lowest days to maturity and maximum pods per cluster as well as the highest grain yield per plant.
