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<p>Drought tolerance in black gram [<i>Vigna</i> <i>mungo</i> (L.) Hepper] is essential for sustaining productivity in water-limited environments. This study evaluated forty genetically diverse black gram genotypes under field conditions across two consecutive years under both well-watered and water-deficit stress regimes. Morphological, physiological, and biochemical traits were assessed to determine genotype performance and drought responsiveness. Drought stress significantly reduced growth and yield traits, while increased proline and soluble sugar accumulation is indicative of adaptive biochemical responses. Principal Component Analysis explained 64.10% of total variability, with proline content, total soluble sugars, and relative water content as key contributors. Cluster analysis grouped genotypes into three distinct drought response categories. Multi-Trait Genotype-Ideotype Distance Index identified six genotypes (LBG-787, PLU-826, IPU 9-16, IPU 10-33, IPU 10-23, and IPU 99-168) as most stable across environments. Based on seed yield and drought tolerance index, genotypes IPU 2-43, PLU-826, PSRJ-95016, LBG-787, IPU 94-1, and PDU-1 exhibited drought tolerance, whereas UH855 was identified as drought sensitive. Significant positive correlations among yield-related traits under both stress and non-stress conditions further confirmed the consistency and stability of these traits across environments. These findings provide valuable genetic resources for breeding programs aimed at developing drought-resilient black gram cultivars.</p>

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Drought stress induced changes in morpho-physiological and yield attributes of black gram

  • 期刊论文

  • 发表日期：

    2025年8月13日

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  • B. Sarkar,
  • R. Mythily,
  • A. Kumar Bharath,
  • K. Tejasree,
  • M. Vanaja,
  • N. Jyothi Lakshmi,
  • H. B. Santosh,
  • K. Salini,
  • P. Sathish,
  • M. Prabhakar,
  • N. S. Jagadisha,
  • M. Srinivasa Rao,
  • V. K. Singh

摘要

Drought tolerance in black gram [Vigna mungo (L.) Hepper] is essential for sustaining productivity in water-limited environments. This study evaluated forty genetically diverse black gram genotypes under field conditions across two consecutive years under both well-watered and water-deficit stress regimes. Morphological, physiological, and biochemical traits were assessed to determine genotype performance and drought responsiveness. Drought stress significantly reduced growth and yield traits, while increased proline and soluble sugar accumulation is indicative of adaptive biochemical responses. Principal Component Analysis explained 64.10% of total variability, with proline content, total soluble sugars, and relative water content as key contributors. Cluster analysis grouped genotypes into three distinct drought response categories. Multi-Trait Genotype-Ideotype Distance Index identified six genotypes (LBG-787, PLU-826, IPU 9-16, IPU 10-33, IPU 10-23, and IPU 99-168) as most stable across environments. Based on seed yield and drought tolerance index, genotypes IPU 2-43, PLU-826, PSRJ-95016, LBG-787, IPU 94-1, and PDU-1 exhibited drought tolerance, whereas UH855 was identified as drought sensitive. Significant positive correlations among yield-related traits under both stress and non-stress conditions further confirmed the consistency and stability of these traits across environments. These findings provide valuable genetic resources for breeding programs aimed at developing drought-resilient black gram cultivars.