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D. Nagarajan T. Kalaimagal E. Murugan

Abstract

Most of the economically important traits in soybean are quantitatively inherited. The generation mean analysis involving a
five-parameter model was carried out in four crosses, viz., Pratap Soya- 2 × LP 5-2, Co 3 × LP 5-2, Co 3 × LP 5-1 and Co 3 × LP 13-1 to investigate additive, dominance and epistatic variance. Therefore, F1, F2 and F3 generations of the above four crosses were evaluated along with their respective parents to estimate the gene action for eleven quantitative traits through generation mean analysis, which provides information about all the gene interactions. The crosses Co 3 × LP 5-1 and Co 3 × LP 13-1 for plant height, Pratap Soya-2 × LP 5-2 for protein content and Co 3 × LP 5-2 for both oil content and seed yield per plant exhibited the adequacy of the additive dominance model. The remaining crosses exhibited epistatic interactions with all other traits. Hence simple recurrent selection can be followed to increase the frequency of desirable genes in the population and the resulted improved population can be used to develop superior lines with desirable genes by pedigree breeding. The crosses Co 3 × LP 5-1 and Pratap Soya - 2 × LP 5-2 were best for further selection programmes with regard to seed yield and quality improvement.

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Keywords

Additive gene effects, Gene action, Inheritance, Quantitative trait, Scaling test, Selection, Soybean

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Nagarajan, D., Kalaimagal, T., & Murugan, E. (2022). Inheritance studies through generation mean analysis for quantitative traits in soybean (Glycine max (L.) Merrill.) . Journal of Applied and Natural Science, 14(SI), 111–118. https://doi.org/10.31018/jans.v14iSI.3576
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