Genotype by environment interaction and stability analyses of advance blast resistant rice genotypes derived from crossing between MR219 and Pongsu Seribu 2

Multi-environmental yield trials is vital in assessing the newly developed rice genotypes for its adaptability and stability across environments especially when the objective to release the newly developed variety for commercial cultivation. The growth performance and phenotypic variability of these genotypes are the combination of environment, genotype and genotype by environment (G×E) interaction factors, thus evaluation must be done since it creates an opportunity for an effective selection of superior genotype. In this study, 18 improved blast resistant rice genotypes developed from the crossing between MR219 and Pongsu Seribu 2 including MR219 as recipient parent were evaluated under four different environments in Peninsular Malaysia. The experiments were carried out using randomized complete block design with three replications at each environment. Data were collected on the vegetative, yield and yield component traits. Analysis of variance revealed significant differences among the genotypes, environments and G×E interaction for most of the traits under study. Low heritability (