Genetic diversity of irrigated medium duration of rice genotypes suited for eastern plain zone of U.P.

Abstract

The present investigation was conducted to examine the genetic diversity existing among 41 genotypes of rice, during kharif-2013 under randomized block design with three replications. The data were recorded for thirteen quantitative characters to obtain estimates of variability, heritability, genetic advance and genetic divergence. Significant differences were observed among the genotypes for all the characters studied. High estimates of GCV and PCV were observed for economic yield followed by harvest index and flag leaf length. High heritability coupled with high genetic advance was recorded for spikelets per panicle. Mahalanobis D 2 analysis revealed considerable amount of diversity in the material. The forty-one genotypes were grouped into seven heterogeneous clusters. Among these clusters, Cluster I had maximum number of genotypes (9). On the basis of mean performance genotypes CR 264-26-1-2-2 and RP 5213-69-13-3-4-1-2-B were found to be the best genotypes in Allahabad agro-climatic conditions. The characters such as grain yield, harvest index, number of panicles per plant and biological yield per plant should be given top priority for effective selection. The present investigation revealed that Cluster V and VII are most diverse to each other and the genotypes constituted in these clusters may be used as parents for future hybridization.