PJB-1997-5
EVALUATION OF PRIMARY YIELD TRAITS IN WHEAT AT SIX ENVIRONMENTS
M.A. SHAHID AND G. KABIR
Abstract
The magnitude of genotype-environment interaction and the stability parameters of 21 F6 Near Isogeneic Lines (NILs) of wheat developed from 4 indigenous inbred lines and 2 exotic lines were estimated over 6 seeding dates for 5 morphological yield traits. The NILs were considered as different genotypes and the seeding dates were treated as different environments. Highly sigilificant GE interaction alongwith their significant linear component for all the traits, except the grains/ear and grain yield/plant, predicted the feasibility of the genotypes under different environments. Linear relationship with the environment was found to be predominant in most of the cases compared to that of non-linear relationship. For the estimation of stability parameters the genotypes 10-12 and 16 for SE 3, 10 and 11 for GE and GY proved to be most stable and suitable performer in any environment and couJd be used for future breeding programme. On the other hand. the genotypes 7, 17 and 18 for most of the traits would be stable and suitable performer under unfavourable environments. Thus, the yield potency might be increased by developing the stable and good performer with either specific or general photothermal adaptation under adverse environments.
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