Generation Mean Analysis for Seed Yield and its Components in Urdbean (Vigna mungo [L.] Hepper)

Author: A.V.S. Durga Prasad and E. Murugan

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Abstract

This research used a six-generation mean analysis for seed yield and its components in five urdbean inter-varietal crossings on scope of gene action. The results of additional scaling tests demonstrated the need for an epistatic model, and an analysis of generation mean analysis (GMA) confirmed that no simple additive-dominance model existed. The variety of gene activities influencing seed yield and quality was another discovery from GMA. The most typical types of interactions are dominance × dominance and duplicate dominant, but additive and epistatic interactions are also feasible. Since these traits are difficult to improve using simple selection methods, pedigree breeding procedures wait until later generations to pick elite lines for maximum efficacy. One or two cycles of recurrent selection, in conjunction with pedigree breeding, would be the optimal technique for choosing superior lines with high seed yield and its components, while also managing epistatic interactions.

Keywords

Generation mean analysis, Urdbean Crossings, Pedigree Breeding, Scaling tests, Epistatic interactions

Conclusion

Upon a thorough exploration of generation strategies in the context of this study, it is evident that the intricate dynamics of gene activities significantly influence all nine parameters related to yield. These interactions encompass a spectrum of possibilities, ranging from additive and dominance to complex epistatic relationships, exemplified by types such as dominance x dominance and duplicate dominant. The nuanced understanding of gene activities uncovered in our analysis, particularly the prevalence of various interaction types, underscores the complexity inherent in the genetic regulation of seed yield and its components in urdbean inter-varietal crossings. Conventional selection methods, geared towards enhancing these crucial yield-related traits, prove to be inherently challenging and insufficient for creating superior progeny. Recognizing this challenge, an alternative approach to bolster the effectiveness of pedigree breeding involves deferring the selection of elite lines to subsequent generations. This strategic delay allows for the identification of superior lines with optimal genetic combinations, ultimately maximizing efficacy in achieving desired yield outcomes. On a contrasting note, the pedigree breeding method emerges as a potent strategy in unearthing improved lines with robust yield components. Employing one or two cycles of recurrent selection within the pedigree breeding framework proves to be an optimal technique. This approach not only facilitates the selection of superior lines with high seed yield and its associated components but also adeptly manages the intricate web of epistatic interactions that play a pivotal role in shaping the genetic landscape.

References

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How to cite this article

A.V.S. Durga Prasad and E. Murugan (2022). Generation Mean Analysis for Seed Yield and its Components in Urdbean (Vigna mungo [L.] Hepper). Biological Forum – An International Journal, 14(1): 1829-1837.