Assessment of Genetic Stability of Medium Slender Rice Genotypes for Yield Traits using AMMI Model and GGE biplot Methodology over Different Locations of Karnataka

Abstract

Medium slender grain varieties of rice are one of the most preferred among the south Indian rice consumers and has a high demand in both national as well as international markets. In the study, 18 medium slender rice genotypes were examined along with four individual checks in Karnataka across four different locations to assess genetic stability using additive main effects and multiplicative interaction (AMMI) model and GGE bi-plot methodology. The genotype environment interaction (G×E interaction) were partitioned into two principal components and were found highly significant. Together, IPCA1 and IPCA2 explained more than 75 percent of G×E interactions for yield trait, with IPCA I explaining maximum G×E interaction. Gangavati and Malnoor were found to be favorable environments. AMMI analysis indicated that the BPT mutant 1801, BPT mutant 1804 and BPT mutant 1811 were found to be most stable genotypes for grain yield across locations over check GGV-05-01. Among rice genotypes, the best elite genotype, BPT mutant 1801 recorded highest grain yield and was also the most stable in grain yield across four locations.