Genetic Analysis for Grain Yield and Its Attributing Characters in Rice (Oryza sativa L.) under Irrigated Conditions of Prayagraj, Uttar Pradesh

Abstract

The present investigation was carried out to assess the genetic variability parameters, correlation and path analysis in 23 rice genotypes for 13 quantitative traits viz Days to 50% flowering, Days to Maturity, Plant height (cm), Flag Leaf Length (cm), Flag Leaf Width (cm), Number of total tillers, Number of Productive Tillers, Panicle Length (cm), Biomass (g), Harvest Index (%), Number of Grains per Panicle, Test Weight (1000 grain weight), Grain Yield per Plant per Plant (g). in Kharif 2021 season at field experimentation centre, Department of Genetics and Plant Breeding, Naini Agricultural Institute, Sam Higginbottom University of Agriculture Technology and Sciences, Uttar Pradesh in Randomized Block Design in three replications. Analysis of variance indicated high significant differences among the genotypes for all the traits. Genotypes SHIATS DHAN-6, KSRV-12, SHIATS DHAN-2, KSRV-140 depicted highest Grain Yield per Plant. All the characters had expressed high estimates of heritability. There is no evidence for characters expressing moderate and low heritability from the present investigation. The studies on GCV and PCV indicated that the presence of high amount of variation and role of the environment on the expression of these traits. The correlation among the yield and yield attributing characters revealed that Grain Yield per Plant per plant was positively and significantly associated at both genotypic and phenotypic levels. In Phenotypic and Genotypic path analysis a detailed analysis of diagonal values showed positive direct effect Grain Yield.