Genetic analysis of traits governing nitrogen fixation in fieldpea
DOI:
https://doi.org/10.53550/jfl.v19i1.2267Keywords:
Fieldpea, Gene effect, Nitrogen fixation, Pisum sativumAbstract
Genetics of quantitative traits responsible for nitrogen fixation viz., number of nodules/plant, nodules volume/plant, nodules dry weight/plant, main root length, 100-seed weight, seed protein content, straw protein content, grain yield and nitrogen fixation/ plant in fieldpea was studied using a half diallel cross involving eight genotypes. Data from the parents and F1s were analyzed using Hayman method of diallel analysis. The estimate of H, was significantly higher than D for all the traits indicating non-additive gene effect for all the characters. The values of H, H, and H,/4H, indicated that there were unequal frequencies of the alleles at all the loci. The value of F and KD/KR ratio showed that all the parents carried more dominant alleles than recessive ones. The value of average degree of dominance (H/D)05 was more than one indicating over-dominance for all the traits. Seed yield and number of root nodules showed high heritability coupled with high genetic advance while other traits had low heritability and low genetic advance.
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