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<p>Mungbean [<i>Vigna radiata</i> (L.) Wilczek] is a vital pulse crop, serving as a significant source of plant-based protein and contributing to the livelihood of smallholder farmers. However, its storage is severely constrained by bruchid beetles (<i>Callosobruchus maculatus</i>), which infest seeds both in the field and during storage, causing substantial losses in seed quality, weight, and viability. This study aimed to develop bruchid-resistant mungbean genotypes through hybridization and to investigate the inheritance pattern of resistance. Resistant (PM-11-51) and susceptible (KM-139) parental genotypes were crossed, and F<sub>1</sub> and F<sub>2</sub> progenies were evaluated for bruchid infestation under controlled laboratory conditions. Parameters recorded included the number of eggs laid, adult emergence, seed damage, seed weight loss, mean development period, and the bruchid susceptibility index. F<sub>1</sub> progenies exhibited complete resistance, suggesting dominant gene action. In the F<sub>2</sub> generation, segregation analysis revealed 26 resistant and 10 susceptible progenies, conforming to the expected 3:1 ratio (χ² = 0.11, <i>p</i> &gt; 0.05), confirming monogenic dominant inheritance. These results demonstrate that bruchid resistance can be effectively introgressed into susceptible genotypes, providing a practical approach for breeding programs aimed at enhancing post-harvest security and seed quality in mungbean.</p>

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Genetic inheritance pattern governing bruchid (Callosobruchus maculatus) resistant in mungbean [Vigna radiata (L.) Wilczek]: a crop improvement strategy

  • 期刊论文

  • 发表日期：

    2026年3月4日

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  • Sanhita Ghosh,
  • Anindita Roy,
  • Sabyasachi Kundagrami

摘要

Mungbean [Vigna radiata (L.) Wilczek] is a vital pulse crop, serving as a significant source of plant-based protein and contributing to the livelihood of smallholder farmers. However, its storage is severely constrained by bruchid beetles (Callosobruchus maculatus), which infest seeds both in the field and during storage, causing substantial losses in seed quality, weight, and viability. This study aimed to develop bruchid-resistant mungbean genotypes through hybridization and to investigate the inheritance pattern of resistance. Resistant (PM-11-51) and susceptible (KM-139) parental genotypes were crossed, and F1 and F2 progenies were evaluated for bruchid infestation under controlled laboratory conditions. Parameters recorded included the number of eggs laid, adult emergence, seed damage, seed weight loss, mean development period, and the bruchid susceptibility index. F1 progenies exhibited complete resistance, suggesting dominant gene action. In the F2 generation, segregation analysis revealed 26 resistant and 10 susceptible progenies, conforming to the expected 3:1 ratio (χ² = 0.11, p > 0.05), confirming monogenic dominant inheritance. These results demonstrate that bruchid resistance can be effectively introgressed into susceptible genotypes, providing a practical approach for breeding programs aimed at enhancing post-harvest security and seed quality in mungbean.