Genetic studies of yield related traits in mungbean (Vigna radiata L. Wilczek)

Rehman, Aziz Ur; Amjad ʻAlī, Muḥammad; Atta, Babar Manzoor; Saleem, Muhammad; Abbas, Amjad; Mallahi, Ahsan Raza

Genetic studies of yield related traits in mungbean (Vigna radiata L. Wilczek)

2009

A full diallel mating system involving eight divergent parents selected from a germplasm pool of 55 mungbean genotypes was used to determine the inheritance of yield related traits such as grain yield per plant, total dry matter, and harvest index. All traits displayed significant (P<0.01) genotypic differences. Adequacy tests founded on joint regression analysis and analysis of variance for Wr+Vr and Wr-Vr between arrays revealed the full fitness of the data and absence of epistatic effects for grain yield in F1 and total dry matter for both generations. The data for grain yield in F2 and harvest index in both generations were partially adequate for genetic analysis due to the presence of non-allelic interactions. The significance of ‘a’ & ‘b’, D, H1 and H2 components demonstrated the importance of both additive and dominance effects for all traits in both generations. However, the value H1 > D for grain yield in F1 and harvest index in F2 generation depicted the preponderance of dominant genes in their genetic control which, thus it was recommended that selection followed by hybridization in early generations was a suitable breeding method for progress in these traits. Conversely, greater value of D over H1 demonstrated additive nature of genes for grain yield in F2, harvest index in F1 and total dry matter in both generations, which advocated the utilization of pedigree and full/half sib selection for improvement of these parameters. Grain yield in F1 and harvest index in F2 generation exhibited moderate narrow sense heritability, while grain yield in F2, harvest index in F1 and total dry matter in both generations had higher heritability (h2 n. s. >0.60).

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