Assessment of combining ability and gene actions for seed yield and quality traits in field pea [Pisum sativum L.]
Keywords:
Combining ability, diallel, Field Pea, Gene effects, Gene actionAbstract
An experiment was conducted to evaluate six parents and their thirty crosses using a full diallel (Method 1, Model I) mating design to decipher the combining abilities and gene actions for seed yield and quality traits in field pea. Analysis of variance showed significant treatment effects for all the traits, indicating sufficient genetic variability. General combining ability (GCA) was significant for all studied traits except seeds per pod and 100-seed weight, while specific combining ability (SCA) was significant for all traits. Among the parents, HFP 9426 was the best general combiner for biological yield, seed yield and protein content, while HFP 1428 excelled in harvest index. HFP 529 and HFP 1428 were good general combiners for early maturity and flowering. Cross HFP 9426 × HFP 1428 and its reciprocal showed significant positive SCA effects for biological and seed yield, while HFP 9426 × HFP 9907B exhibited desirable SCA effects for maturity, plant height and starch content. Predominance of non-additive gene action was observed for all traits except plant height. Therefore, emphasis should be given to specific crosses rather than pursuing gca. Biparental mating followed by selection in progenies may be employed in segregating generations to break the undesirable linkage.
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