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Journal of Pharmacognosy and Phytochemistry

Journal of Pharmacognosy and Phytochemistry

Vol. 7, Special Issue 4 (2018)

Genetic divergence and cluster analysis studies in rice (<em>Oryzasativa</em> L.) using D<sup>2</sup> statistics

Author(s):

KLY Tejaswini, Srinivas Manukonda and PV Ramana Rao

Abstract:
The nature and magnitude of genetic divergence was estimated in one hundred and fourteen F<sub>5</sub> families of rice obtained from six different crosses along with their seven parents using Mahalanobis D<sup>2</sup>- statistics. ANOVA revealed the presence of considerable amount of variability among the genotypes. High PCV and GCV were observed for grain yield per plant and test weight. High heritability coupled with high genetic advance as per cent of mean was observed for number of grains per panicle, grain yield per plant and test weight indicating the presence of additive gene action in governing the inheritance of these traits. Hence, direct phenotypic selection is useful with respect to these traits. Mahalanobis D<sup>2</sup> analysis revealed considerable amount of diversity in the material. The genotypes were grouped into twelve clusters. Cluster IX constituted maximum number of genotypes (26). The genotypes falling in cluster VII had the maximum divergence, which was closely followed by cluster VII and cluster XI. The maximum inter cluster D<sup>2</sup> values was observed between cluster X and XI (931.276) followed by cluster VII and XI (814.784) suggesting that the genotypes constituted in these clusters may be used as parents for future hybridization programme.

Pages: 108-116  |  1059 Views  205 Downloads

How to cite this article:
KLY Tejaswini, Srinivas Manukonda and PV Ramana Rao. Genetic divergence and cluster analysis studies in rice (<em>Oryzasativa</em> L.) using D<sup>2</sup> statistics. J Pharmacogn Phytochem 2018;7(4S):108-116.