Genotype x environment interaction of near isogenic introgression lines (NIILs) under drought stress and non-stress environments in upland rice (Oryza sativa L.)

Abstract

The superior NIILs selected for productivity under artificial drought condition were evaluated over three drought stress and three non-stress environments. AMMI based stability parameter; ASTABi and Rao’s Index of stability were utilized to interpret the stability among the NIILs under stress and non-stress environments. The grain yield was much sensitive and highly influenced by environment resulting in higher G x E interaction under stress environments. Pooled deviation was highly significant indicating the presence of non-predictable components for grain yield and yield related traits. Based on ASTABi, RF-55-254 was most stable genotype which was also the best for grain yield (6613 kg/ha) in non-stress environments, while it was unstable under stress environments. The genotype, RF-55-198 was superior for yield as well as stability in stress environments and for overall adaptability.