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Analysis of Genetic Diversity in Some Potato Varieties Grown in Bangladesh

Genetic diversity using Mahalanobis's D - technique was studied for tuber yield and its components 2 viz., Plant Height (PH), Number of Leaves/plant (NLPP), Fresh Weight/plant (FWP), Number of Tubers/plant (NLPP), Number of Eyes/tuber (NEPT), Average Tuber Weight of Plant (ATWP) and Tuber weight/plant (TWt./P). The 30 potato genotypes were grouped into six clusters. The maximum diversity was contributed by tuber weight/plant. The cluster III and cluster IV contained the maximum number of genotype and the cluster I contained the minimum. The highest inter-cluster distance between cluster I and cluster VI followed by between cluster I and cluster v showing wide diversity among the groups. The highest intra-cluster distance was observed in cluster VI and lowest in cluster II. The inter cluster distance in most of the cases were higher than the intra-cluster distance indicating wider genetic diversity among the genotypes of different groups. Plant height, number of leaves/ plant, fresh weight/plant and tuber weight/plant showed maximum contribution towards total divergence among the genotypes.