Studies on Character Association among Yield and Its Components in Elite Rice (Oryza sativa L.) Germplasm

Abstract

The present investigation was conducted at the experimental farm of Rice and Wheat Research Centre, Malan during Kharif, 2022. Experimental material comprising 40 elite rice (Oryza sativa L.) genotypes including three checks were evaluated in Randomized complete Block Design in three replications. Data was recorded on days to 50% flowering (DFF), days to 75% maturity (DSM), plant height (PH), panicle length (PL), total tillers per plant (TTPP), spikelets per panicle (SPP), grains per panicle (GPP), grain yield per plant (GYPP) and grain yield per plot (GYPPL). Significant genotypic differences were existed among the genotypes. Grain yield was found positively and significantly correlated with spikelets per panicle and grains per panicle, which means selection through these traits would be effective. Path studies revealed that positive correlation of spikelets per panicle with grain yield per plant was due to its high direct effect at phenotypic level while at genotypic level it was indirect by grains per panicle followed by panicle length and days to 50% flowering. Whereas the correlation of grains per panicle with grain yield per plant was due to direct effect at genotypic level the result of indirect effect by spikelet/ panicle at phenotypic level.