In the eastern Indo‐Gangetic plains, chickpea is grown postrice cultivation mostly under rainfed condition with residual soil moisture which adversely affects branching as well as pod and seed development, ultimately resulting in substantial yield losses. The current study analysed the moisture stress response of 12 chickpea genotypes with control for different morpho‐physiological traits in two sets of field experiments carried out during the year 2017–18 and 2018–19. The current study observed varying response of chickpea genotypes under moisture stress condition with average yield reduction from 11.79% to 24.77%. Mean yield of genotypes under stress condition showed a strong positive association with yield index (1.00**) and stress tolerance index (0.915**). The biplot principal component analysis revealed maximum potential of three chickpea genotypes (DBGC 1, Pusa 256 and DBGC 2) for grain yield and biological yield under moisture stress condition. The correlation analysis showed a significant association of yield with physiological parameters such as photosynthetic rate (0.363**), stomatal conductance (0.364**) and transpiration rate (0.292*). The three higher yielding genotypes relatively maintained biological yield, yield plant−1, 100 seed weight and photosynthesis rate and showed reduced rates of stomatal conductance and transpiration under moisture stress condition. The study found variable genotypic response to moisture stress and showed that yield index as well as stress tolerance index was more effective to identify superior genotypes for moisture stress condition. The superior genotypes identified in the present study may be considered for rainfed areas of eastern Indo‐Gangetic plains and can be used in future chickpea breeding programs for drought tolerance.

中文翻译：

---

基于印度恒河平原东部形态生理参数揭示鹰嘴豆对水分胁迫的基因型响应


在印度恒河平原东部，鹰嘴豆主要在雨养条件下种植，土壤残留水分对分枝以及豆荚和种子发育产生不利影响，最终导致产量大幅损失。目前的研究在 2017-18 和 2018-19 年进行的两组田间实验中分析了 12 种鹰嘴豆基因型的水分胁迫响应，并控制了不同的形态生理性状。目前的研究观察到鹰嘴豆基因型在水分胁迫条件下的不同反应，平均产量下降从 11.79% 到 24.77%。胁迫条件下基因型的平均产量与产量指数（1.00**）和胁迫耐受指数（0.915**）呈强正相关。双标图主成分分析揭示了三种鹰嘴豆基因型（DBGC 1、Pusa 256 和 DBGC 2）在水分胁迫条件下谷物产量和生物产量的最大潜力。相关分析显示产量与光合速率（0.363**）、气孔导度（0.364**）和蒸腾速率（0.292*）等生理参数显着相关。三种高产基因型相对保持了生物产量、产量植物-1、100种子重量和光合作用速率，并且在水分胁迫条件下表现出气孔导度和蒸腾速率降低。该研究发现了对水分胁迫的可变基因型反应，并表明产量指数和胁迫耐受指数更能有效地识别水分胁迫条件下的优良基因型。 本研究中确定的优良基因型可考虑用于印度恒河平原东部的雨养地区，并可用于未来的鹰嘴豆耐旱育种计划。