Author(s):

KL Manikanta Swamy, G Ravindra Reddy and Suresh BG

Abstract: The present investigation was carried out with 39 rice genotypes at the Field Experimentation Centre, Department of Genetics and Plant Breeding, Sam Higginbottom University of Agriculture, Technology & Sciences Prayagraj during Kharif-2018. The study included Analysis of variance, assessment of variability, Heritability, Genetic advance, Genetic Diversity. The experimental material was sown in a randomized block design with three replications and observations were recorded on five randomly selected plants for 13 yield and yield components. The presence of large amount of variability might be due to diverse source of materials taken as well as environmental influence affecting the phenotypes. All the character’s showed significant at 5% level of significant. Higher difference between GCV and PCV were depicted for number of tillers per plant, harvest index, grain yield per plant. High heritability coupled with high genetic advance in the present set of genotypes was recorded for number of spikelet per panicle followed by days to 50% flowering and days to maturity, indicating the predominance of additive gene effects and the possibilities of effective selection for the improvement of these characters. The 39 genotypes were grouped into 4 clusters cluster III with 21 genotypes emerged as the cluster followed by cluster I includes 15 genotypes, cluster II comprised 2 genotypes and cluster IV includes one genotypes. The pattern of group constellation proved the existence of significant amount of variability. Maximum intra cluster distance was recorded for cluster III followed by I and II whereas minimum intra cluster distance recorded for IV. The inter cluster D² value was maximum between cluster I and IV.

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