Evaluating Physiological and Yield Indices of Egyptian Barley Cultivars Under Drought Stress Conditions

作者：Wessam A. Abdelrady, E. E. El-Shawy, H Abdel-Rahman, Syed Muhammad Hassan Askri, Zakir Ibrahim, Mohamed Mansour, I El-Degwy, Taha Ghazy, Aziza A. Aboulila, Imran Haider Shamsi · 发表于：Agronomy · 年份：2024 · DOI：10.3390/agronomy14112711 · 被引用次数：9 · 研究领域：Crop Yield and Soil Fertility、Genetics and Plant Breeding、Rice Cultivation and Yield Improvement

Climate change significantly threatens crops, mainly through drought stress, affecting barley, which is essential for food and feed globally. Ten barley cultivars were evaluated under normal and drought stress conditions during the 2019/20 and 2020/21 seasons, focusing on traits such as days to heading and maturity, plant height, number of spikes m−2, spike length, 1000-kernel weight, and biological and grain yield. Drought stress significantly reduced most of these traits. The genotypes showed significant differences in their responses to irrigation treatments, with the interaction between seasons and cultivars also being significant for most traits. The grain yield and 1000-kernel weight were among the least affected traits under drought stress, respectively. Notably, Giza138 and Giza126 showed strong drought tolerance, suitable for drought-resilient breeding. In season one, Giza126, Giza134, and Giza138 yielded 13%, 9%, and 11%, respectively, while Giza135 and Giza129 showed higher reductions at 31% and 39%. In season two, Giza126, Giza134, and Giza138 had reductions of 14%, 10%, and 13%, respectively, while Giza135 and Giza129 again exhibited higher reductions at 31% and 38%. These cultivars also showed strong performance across various stress tolerance indices, including the MP, YSI, STI, GMP, and YI. Giza 134 demonstrated the lowest values for the SDI and TOL, indicating superior drought stress tolerance. On the other hand, Giza 129 and Giza 135 were the most sensitive ...