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Appraising Drought Tolerance in Barley Genotypes for Advancing Sustainable Food Security Using PCA Analysis

文献类型： 外文期刊

作者： Ahmed, Hafiz Ghulam Muhu Din 1 ; Yang, Tao 2 ; Akram, Muhammad Irfan 3 ; Iqbal, Rashid 4 ; Aghayeva, Saltanat 5 ; Alkubaisi, Noorah 6 ; Elshikh, Mohamed S. 6 ; Zeng, Yawen 2 ;

作者机构： 1.Islamia Univ Bahawalpur, Fac Agr & Environm, Dept Plant Breeding & Genet, Bahawalpur 63100, Pakistan

2.Yunnan Acad Agr Sci, Biotechnol & Germplasm Resources Inst, Kunming 650205, Peoples R China

3.Islamia Univ Bahawalpur, Fac Agr & Environm, Dept Entomol, Bahawalpur 63100, Pakistan

4.Islamia Univ Bahawalpur, Fac Agr & Environm, Dept Agron, Bahawalpur 63100, Pakistan

5.Western Caspian Univ, Dept Life Sci, Baku, Azerbaijan

6.King Saud Univ, Coll Sci, Dept Bot & Microbiol, Riyadh 11451, Saudi Arabia

关键词： drought; grains; flavonoids; association; barley

期刊名称：ROMANIAN AGRICULTURAL RESEARCH （ 影响因子：1.0； 五年影响因子：0.8 ）

ISSN： 1222-4227

年卷期： 2025 年 42 卷

页码：

收录情况： SCI

摘要： Barley is a globally important crop due to its nutritional value and socioeconomic significance, serving as a primary source of food and feed in diverse environments. This study assessed 50 barley cultivars under contrasting environmental conditions, normal (non-stressed) and drought (stressed), using a randomized complete block design (RCBD) with three replications. Analysis of variance (ANOVA) revealed significant differences among the genotypes for all examined traits under both conditions, highlighting substantial genetic variation. Genotypes G12, G8, G23, G20, and G16 demonstrated superior performance across both environments, while G35, G37, G47, G48, and G42 were identified as drought susceptible. Correlation analysis under non-stressed conditions indicated a significant positive relationship between grain yield per plant and other studied traits. Principal component analysis (PCA) identified four significant components under both conditions, accounting for a cumulative variance of 78.7% (normal) and 74.5% (drought) in PC1. Subsequent components explained 14.6%, 12.2%, and 10.1% of variance under normal conditions, while drought conditions resulted in 16.7%, 11.6%, and 11.1% in PC2, PC3, and PC4, respectively. These findings offer critical insights for breeding programs aimed at developing drought-resilient barley cultivars. The identified genotypes with superior traits can serve as foundational material for enhancing barley productivity under water-limited conditions. This study contributes to the broader efforts of ensuring sustainable food security through genetic improvement and targeted cultivation strategies.

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