DROUGHT-INDUCED TRAIT CORRELATIONS IN BARLEY GENOTYPES THROUGH A MULTI-TRAIT SELECTION APPROACH

文献类型： 外文期刊

第一作者： Yang, J.

作者： Yang, J.;Ahmed, H. G. M. D.;Zeng, Y.;Ahmed, H. G. M. D.;Akram, M., I;Iqbal, R.;Iqbal, R.;Alwahibi, M. S.;Elshikh, M. S.

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关键词： yield; morphological; variability; breeding; resilience

期刊名称：APPLIED ECOLOGY AND ENVIRONMENTAL RESEARCH （ 影响因子：0.6； 五年影响因子：0.8 ）

ISSN： 1589-1623

年卷期： 2025 年 23 卷 3 期

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收录情况： SCI

摘要： Drought stress significantly influences trait correlations in barley genotypes, affecting overall plant performance and productivity. This study evaluated 30 barley genotypes for various physiomorphological traits under normal and drought conditions using a randomized complete block design (RCBD). Analysis of variance (ANOVA) revealed highly significant (P < 0.01) genotypic, environmental, and genotype-by-environment (G x E) interactions for key traits, demonstrating substantial genetic variability and the impact of drought on trait expression. Chlorophyll Content (CC) declined from 18.21 to 17.15 under drought, while Flag Leaf Area (FLA) decreased from 37.81 cm2 to 30.51 cm2. Plant Height (PH) reduced from 92.07 cm to 82.95 cm, and Biological Yield (BY) declined from 33.03 g to 30.61 g. Main Spike Grain Weight (MSGW) showed a notable reduction from 3.32 g to 2.76 g. Some genotypes demonstrated the ability to perform better and maintain their yield-related traits under water-limited conditions such as G2, G3, G7, G13 and G22 which are critical indicators of drought resilience. Correlation analysis highlighted strong trait associations, with CC positively correlated with BY (r = 0.69), NTP with PH (r = 0.66), and FLA with MSGW (r = 0.73) under normal conditions. Under drought stress, CC showed positive correlations with SL (r = 0.64) and MSGW (r = 0.56), while NTP was significantly associated with BGW (r = 0.72). The stability of traits such as Spike Length (SL) and Number of Tillers per Plant (NTP) across environments suggests their potential as reliable selection criteria in drought-resilience breeding. These findings underscore the importance of understanding drought-induced trait correlations to enhance selection efficiency in barley breeding programs.

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