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Evaluation of Durum Wheat Lines Based on Yield and Morphological Traits for the Selection of Ideal Genotypes
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Ali Akbarabadi *   , Hossein Kazemi , Tohid Najafi Mirak |
| Horticultural Science Research Department, Khuzestan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Ahvaz, |
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Abstract: (328 Views) |
| Drought is a major abiotic stress that significantly impairs plant growth and productivity. This study aimed to evaluate 17 durum wheat lines, alongside three control cultivars Taban, Sana, and Mehregan under drought conditions at the Shavour Agricultural Research Station during the 1402-1403 crop year. The experiment was conducted using a randomized complete block design with three replications. Analysis of variance revealed significant differences among the wheat lines for several traits, including days to spike emergence, days to maturity, plant height, grain yield, spike length, and peduncle length. Mean comparison results indicated that lines 12, 19, 22, and 23 outperformed the other lines in most traits. Genetic analysis revealed that the highest genetic variance was associated with grain yield, spike emergence time, and plant height. Furthermore, general heritability estimates were highest for grain yield (66%), days to spike (80%), and plant height (46%). Significant positive correlations were found between grain yield, spike length, and height, suggesting that these traits contribute to higher grain yield. The SIIG index, a useful tool for selecting superior genotypes, identified lines 12, 22, 19, and 23 as the top performers. These findings suggest that spike emergence time and plant height are key traits for improving grain yield under drought stress. The results of this study provide valuable insights for the selection of drought-resistant wheat lines with high grain yield potential. |
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| Keywords: wheat, Abiotic stress, grain yield, heritability, SIIG index |
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Full-Text [PDF 595 kb]
(172 Downloads)
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Type of Study: Research |
Subject:
Abiotic Stresses
Received: 2025/08/12 | Accepted: 2025/12/31 | Published: 2025/12/31
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