Genetic variability, correlation and path coefficient analysis studies in rice (Oryza sativa L.) under alkaline soil condition

Abstract

Rice occupies a pivotal place in the Indian agriculture and has been grown under diverse ecological conditions andgets exposed to different environmental stresses like salinity, alkalinity, drought, cold etc. The experiment wasconducted to study the response of rice genotypes and their quantitative traits under alkaline soil condition toexamine the nature and magnitude of variability, heritability and genetic advance. Variability studies revealedsignificant differences among the genotypes for the traits studied. High values of heritability and genetic advancewere observed for total spikelet per panicle, thousand grain weight and total biomass. Number of productive tillers,total spikelet per panicle, total biomass, days to 50 per cent flowering and plant height were the traits whichexhibited significant positive association with grain yield. Path analysis revealed that their direct effects on grainyield through total biomass and harvest index were also very high. Thus these traits which contribute to the grainyield under alkaline soil condition could be exploited for further breeding programme.

Keywords

• Rice
• correlation
• path coefficient analysis
• soil alkalinity
• grain yield