Stability Analysis of Rice (Oryza sativa L.) Hybrids Utilizing Regression and AMMI models

Stability Analysis of Rice (Oryza sativa L.) Hybrids Utilizing Regression and AMMI models

Four CMS lines were crossed with 13 restorers in a line x tester fashion during kharif, 2010. Fifty two hybrids along with three checks were evaluated for yield and yield contributing characters over four different agro-climatic zones in Andhra Pradesh, India during rabi 2010-11. The analysis of variance of Eberhart and Russell indicated that G x E interaction was significant for all the characters under study and that genotypes differed significantly. AMMI is a useful tool for interpreting genotype ´ environment interaction in multi environment trials. Among the AMMI components first IPCA axis explained most of the portion of G x E interaction than other IPCA axis. According to Eberhart and Russell model the hybrids like APMS 10A x MTU 1071 and APMS 10A x MTU II- 190-1-1-1-1-1 showed stable performance whereas in AMMI analysis the hybrids viz., APMS 10A x MTU 1071, APMS 10A x MTU II -187-6-1-1, APMS 9A x MTU II -187-6-1-1, APMS 10A x MTU II-190-1-1-1-1-1 and IR 58025A x MTU II-110-9-1-1-1-1 were more stable as they recorded IPCA score near zero and less interaction with environments. AMMI model ANOVA brings out G x E interaction through IPCA1 which gets combined with error in the other ANOVA and points out the utility of AMMI models in studying the G x E interaction and identifying stable genotypes for characters which so undetected in the earlier analysis.