PJB-2024-18
GENETIC VARIABILITY AMONG ADVANCED WHEAT LINES FOR YIELD AND YIELD RELATED TRAITS
AIZAZ AKBAR
Abstract
In the context of the growing national demand for food, it is essential to assess genetic gain in wheat productivity due to release of CIMMYT advanced wheat lines. In present study 49 CIMMYT advanced wheat lines including one commercial cultivar (Swabi-1) were used in the experiment to evaluated on the basis of growth and yield performance. Experiment was laid out in randomized complete block design (RCBD) with three replications during Rabi season 2021-2022 at Agriculture Research Station (ARS), Swabi-Khyber Pakhtunkhwa. Analysis of variance revealed highly (P≤ 0.01) significant differences among the genotypes for all the studied traits. Estimation of high heritability (h2) coupled with high genetic advance as percent of mean (GAM%) were found for grain filling duration (h2= 0.76, GAM%= 29.20), biological yield (h2= 0.86, GAM%= 23.74) and grain yield (h2= 0.80, GAM%= 30.21). Grain yield exhibited significant positive phenotypic and genotypic associations with productive tillers plant-1 (rp= 0.21**, rg= 0.44**), biological yield (rp= 0.69**, rg= 0.80**) and harvest index (rp= 0.69**, rg= 0.70**) while significant positive phenotypic association with days to heading (rp= 0.16*). CIMMYT advanced wheat lines, CIM-10 and CIM-36 remained at the top for yield and most of the yield related traits and can be forwarded for variety approval process and could be utilized in future breeding programs.
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