Genotype x Environment Interaction and Yield-Stability Analysis of Rice (Oryza sativa L.) Grown in Salt Affected Soil

Abstract

This study was conducted during Kharif, 2019 At the Students Instructional Farm, MES and Agronomy Farm of A.N.D.U.A.T., Kumarganj, Ayodhya, the trials were set up in RBD with three replications. The experimental material comprised of 25 genotypes of rice were evaluated for 11 quantitative traits under three different environmental locations. High significant mean squares were found for all eleven research characteristics in the environment-specific analysis of variance and the pooled analysis of variance for three environments encompassing one crop season. T-3, Kavery Sampoorna, NDRK-11-27, Moti Gold, and NDRK-11-29 under irrigated circumstances were the genotypes demonstrating high mean performance for grain yield per plant and some of its significant components when considering the mean performance of genotypes under various environmental situations. Out of 25 genotypes tested in three conditions, T-3, Kavery Sampoorna, and NDRK-11-27 had the maximum grain yield per plant.In path coefficient analysis highest positive direct effects on grain yield per plant was exerted by L/B ratio (0.281), followed by panicle length (0.167), number of fertile spikelet per plant (0.092) and days to 50% flowering (0.037). On the other hand, negative direct effects on grain yield per plant was exerted by plant height (-0.255), leaf area index (-0.195), spikelet fertility (-0.187), biological yield per plant and harvest index (-0.126) and productive tillers / plant (-0.049). Positive indirect effects on spikelet fertility was recorded via biological yield per plant (0.040) followed by panicle length via biological yield per plant (0.264), productive tiller per plant biological yield per plant (0.021) and plant height via biological yield per plant (0.011).
 Considering the mean performance and stability parameters, three high yielding genotypes T-3, Kavery Sampoorna and NDRK-11-27 merit due consideration for recommending their exploitation as cultivars or varieties for commercial cultivation and/or as donor for hybridization programme for wide range of environments pertaining especially to different environments. In addition to these genotypes, several other genotypes exhibiting high or average mean performance, desirable non- linear response and stable nature for different characters may also be useful for exploitation as parents in hybridization programme as donors for characters for which they showed superiority even if they had average or low grain yield per plant.