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<p>The winged bean (<i>Psophocarpus tetragonolobus</i>), a highly nutritious yet underutilized legume, exhibits significant genetic diversity across different agro-climatic regions. However, more attention is needed to fully exploit its potential due to lack of adequate knowledge of the existing genetic diversity in the available winged bean germplasm. To bridge this gap, the study evaluates 28-winged bean genotypes collected from various districts of Kerala, Tamil Nadu, Manipur, India and NBPGR. The research aimed to assess the phenotypic variability of these genotypes to support future breeding programs. A randomized block design (RBD) was used for the experiment, with observations recorded for 12 quantitative traits, including vine length, pod yield, seed characteristics, and germination parameters. Germination performance varied widely, with CBE-PT-10 germinating earliest (8.74&#xa0;days) and EC0038959 latest (27.24&#xa0;days), highlighting differences in seed vigor. Pod length (14.31–46.18&#xa0;cm), pod width (2.14–3.63&#xa0;cm), and number of seeds per pod (5.34–22.68) exhibited high heritability (&gt; 95%) coupled with high genetic advance, suggesting strong additive genetic control and suitability for direct selection. Notably, CBE-PT-17 recorded the longest pods (46.18&#xa0;cm), highest single pod weight (51.17&#xa0;g), and maximum pod yield per plant (929.55&#xa0;g), while also producing superior seed yield (312.34&#xa0;g per plant), making it a superior genotype for yield improvement. Correlation analysis revealed very strong positive associations of pod length and pod width with seed number, pod weight, and yield, indicating that simultaneous improvement of these traits could significantly enhance productivity. Principal component and cluster analyses further emphasized pod and seed traits as the major contributors to genetic divergence, with Cluster I genotypes (CBE-PT-17, CBE-PT-04, CBE-PT-15) outperforming others in yield potential. </p>

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Unveiling the Genetic Diversity of Winged Bean (Psophocarpus tetragonolobus (L.) DC.) Genotypes: A Phenotypic and Genotypic Assessment for Crop Improvement

  • 期刊论文

  • 发表日期：

    2025年12月16日

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  • Rakshitha R,
  • Thangamani C,
  • Kavitha M,
  • N. Manivannan,
  • R. Raghu,
  • C. Indu Rani,
  • P. Murugesan,
  • Kingsly Raj A

摘要

The winged bean (Psophocarpus tetragonolobus), a highly nutritious yet underutilized legume, exhibits significant genetic diversity across different agro-climatic regions. However, more attention is needed to fully exploit its potential due to lack of adequate knowledge of the existing genetic diversity in the available winged bean germplasm. To bridge this gap, the study evaluates 28-winged bean genotypes collected from various districts of Kerala, Tamil Nadu, Manipur, India and NBPGR. The research aimed to assess the phenotypic variability of these genotypes to support future breeding programs. A randomized block design (RBD) was used for the experiment, with observations recorded for 12 quantitative traits, including vine length, pod yield, seed characteristics, and germination parameters. Germination performance varied widely, with CBE-PT-10 germinating earliest (8.74 days) and EC0038959 latest (27.24 days), highlighting differences in seed vigor. Pod length (14.31–46.18 cm), pod width (2.14–3.63 cm), and number of seeds per pod (5.34–22.68) exhibited high heritability (> 95%) coupled with high genetic advance, suggesting strong additive genetic control and suitability for direct selection. Notably, CBE-PT-17 recorded the longest pods (46.18 cm), highest single pod weight (51.17 g), and maximum pod yield per plant (929.55 g), while also producing superior seed yield (312.34 g per plant), making it a superior genotype for yield improvement. Correlation analysis revealed very strong positive associations of pod length and pod width with seed number, pod weight, and yield, indicating that simultaneous improvement of these traits could significantly enhance productivity. Principal component and cluster analyses further emphasized pod and seed traits as the major contributors to genetic divergence, with Cluster I genotypes (CBE-PT-17, CBE-PT-04, CBE-PT-15) outperforming others in yield potential.