Stability for BRRI developed Promising Hybrid Rice for Yield and it’s Related traits

摘要

The study was performed to analyze the genotype-by-environment (G x E) interaction for thirteen (13) promising rice hybrids over 5 locations in Bangladesh. The purpose of this study was to evaluate the magnitude of stability and adaptability of the genotypes in different regions of the country in different environmental status. Multivariate analysis (MANOVA) technique was used for grain yield, days to 50% flowering and number of panicles per m2 where two genotypes used as local check. The AMMI (Additive Main effects and Multiplicative Interaction) model was used to assess the interaction and to select better performing ones having higher yield and other potential attributes. Considering the mean, regression coefficient (bi) and deviation from regression (S2di), it was evident that all the genotypes showed different responses of adaptability under different environmental conditions. Analysis of variance (ANOVA) showed high significant effects of environments, genotypes and G x E for grain yield, days to 50% flowering and number of panicle per m2. Among the hybrids BRRI 10A/BRRI 12R, BRRI 9A/BRRI 15R, BRRI hybrid dhan2, BRRI dhan28 and BRRI dhan29 found highly stable across the environments. BRRI 10A/BRRI 12R, BRRI 9A/BRRI 15R, II32A/BRRI 15R, II32A/BRRI 10R and BRRI hybrid dhan3 are highly stable as well as high yielder. BRRI hybrid dhan2 also highest yielder and stable across environment. Comilla and Shatkhira showed high mean with high negative interaction. Gazipur had moderate yielder with high positive interaction and Barisal given negligible interaction and found highly suitable region in Bangladesh for hybrid rice cultivation.