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VOL. 6, ISSUE 4 (2021)
Studies on genetic divergence among rice (Oryza sativa L.) genotypes
Authors
K Vinodhini, P Satheeshkumar, K Saravanan, T Sabesan, A Kamaraj, S T Ponsiva
Abstract
An experiment was conducted with 50 genotypes of rice to estimate the nature and magnitude of genetic divergence, using Mahalanobis’ D2 statistic. Observations were recorded on ten agronomic traits viz., plant height at maturity, number of productive tillers per plant, panicle length, seeds per panicle, seed length, seed breadth, thousand seed weight, flag leaf length, flag leaf breadth and seed yield per plant. The genotypes were grouped into as many as six clusters. Cluster III encomposed thirty three genotypes followed by cluster I with eight genotypes. Cluster V included three genotypes. Clusters II, IV and VI each comprised of two genotypes. The intra-cluster distance was maximum with cluster V. The inter-cluster distance was maximum between the clusters II and V. Highest mean value for plant height at maturity, number of productive tillers per Plant, panicle length, seeds per panicle, flag leaf length, flag leaf breadth and seed yield per plant was recorded with the Cluster V. Seed yield per plant followed by seeds per panicle and thousand seed weight contributed maximum towards the total genetic divergence. Hybridization among the genotypes grouped in the clusters II and V, may produce high yielding heterotic hybrids and/or wider variability in segregating generations.
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Pages:784-786
How to cite this article:
K Vinodhini, P Satheeshkumar, K Saravanan, T Sabesan, A Kamaraj, S T Ponsiva "Studies on genetic divergence among rice (<em>Oryza sativa </em>L.) genotypes ". International Journal of Botany Studies, Vol 6, Issue 4, 2021, Pages 784-786
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