Nargis Akter1, M. M. Islam2, A. S. M. Yahiya3 and M. A. Newaz4


Genetic divergence of 29 breeding lines and cultivated accessions (varieties) from Bangladesh and exotic origin were estimated using Mohalanobis’s D2 and principal component analysis. On the basis of D2 analysis, 29 genotypes were grouped into five clusters, both the cluster I and IV contained the largest number of genotypes (eight), followed by cluster II having six genotypes. The experiment was conducted during the period from April to November’ 2004. The seeds of the experimental materials were raised in well-prepared land in Randomized Complete Block Design with three replications. It was observed from the distribution pattern that the genetic divergence and geographical distribution were random and independent. The highest intra cluster distance was estimated for cluster IV (17.1) which consisted of eight genotypes and was followed by cluster I (2.578) and cluster V (1.971). The inter cluster distance was maximum (13.876) between cluster IV and II followed by the clusters IV and III (13.292), V and II (9.531), V and III (7.964), IV and I (7.938) indicating that the genotypes under those clusters were highly divergent from each other. Characters like green weight without leaves, stick weight and seed yield pod-1 contributed considerably to the total divergence. Cluster I contained maximum extreme values while least values had in the cluster V. Crossing between the genotypes of these two groups would produce high heterotic progeny.
J. Expt. Biosci.1(1):1-6, January 2010

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1Principal Scientific officer, Breeding Division, 2Principal Scientific Officer, Agronomy Division, 3Scientific officer, Genetic Resources and Seed Division, Bangladesh Jute Research Institute, Dhaka, 4Professor, Department of Genetics and Plant Breeding, Bangladesh Agricultural University, Mymensingh
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