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<p>Mutation breeding is a promising approach for generating genetic variability and enhancing trait performance in elite crop varieties. The present investigation was undertaken to study the effect of gamma rays, EMS, and their combination treatments on agronomic and biochemical traits in the M<sub>2</sub> generation of the high-yielding vegetable soybean variety Him Palam Hara Soya 1. Seeds were treated with varying doses of gamma irradiation (100, 200, 300&#xa0;Gy), EMS (0.1%, 0.2%, 0.3%), and their respective combinations.Significant variation was observed in chlorophyll mutation frequency, leaf chlorophyll and carotenoid content, plant height, days to flowering, and seed yield. The combined treatment of 100&#xa0;Gy + 0.1% EMS exhibited the highest mutagenic effectiveness and efficiency, inducing early flowering and higher chlorophyll-<i>a</i> and carotenoid contents. ANOVA indicated highly significant (<i>P</i> ≤ 0.01) treatment effects for most studied traits, with considerable broad-sense heritability and genetic advance, particularly for yield per plant and biochemical constituents.These findings suggest that induced mutagenesis is a potent strategy to create early-maturing, high-yielding, and improved soybean genotypes. The promising mutants identified in this study may serve as valuable genetic resources for varietal improvement programs.</p>

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Induced genetic variability and biochemical amelioration in vegetable soybean [Glycine max (L.) Merrill] using gamma rays and EMS treatments

  • 期刊论文

  • 发表日期：

    2025年12月22日

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  • Vishva Deepak Chaturvedi,
  • Piyush Kumar Singh,
  • Aparajita Dwivedi,
  • Vedna Kumari

摘要

Mutation breeding is a promising approach for generating genetic variability and enhancing trait performance in elite crop varieties. The present investigation was undertaken to study the effect of gamma rays, EMS, and their combination treatments on agronomic and biochemical traits in the M2 generation of the high-yielding vegetable soybean variety Him Palam Hara Soya 1. Seeds were treated with varying doses of gamma irradiation (100, 200, 300 Gy), EMS (0.1%, 0.2%, 0.3%), and their respective combinations.Significant variation was observed in chlorophyll mutation frequency, leaf chlorophyll and carotenoid content, plant height, days to flowering, and seed yield. The combined treatment of 100 Gy + 0.1% EMS exhibited the highest mutagenic effectiveness and efficiency, inducing early flowering and higher chlorophyll-a and carotenoid contents. ANOVA indicated highly significant (P ≤ 0.01) treatment effects for most studied traits, with considerable broad-sense heritability and genetic advance, particularly for yield per plant and biochemical constituents.These findings suggest that induced mutagenesis is a potent strategy to create early-maturing, high-yielding, and improved soybean genotypes. The promising mutants identified in this study may serve as valuable genetic resources for varietal improvement programs.