| Evaluation of drought tolerance of different wheat genotypes under dryland and supplementary irrigation conditions |
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| DOI：10.7606/j.issn.1000-7601.2025.01.02 |
| Key Words: wheat genotype drought stress principal component analysis cluster analysis drought tolerant index |
| Author Name | Affiliation | | SUN Xianyin | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | LV Guangde | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | QI Xiaolei | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | XU Jiali | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | SUN Yingying | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | MI Yong | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | MU Qiuhuan | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | YIN Xundong | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | ZHANG Jibo | Shandong Provincial Meteorological Center, Ji’nan, Shandong 250031, China | | WANG Ruixia | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | QIAN Zhaoguo | Tai’an Academy of Agricultural Science, Tai’an, Shandong 271000，China | | GAO Minggang | Weifang University, Weifang, Shandong 261061, China |
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| Abstract: |
| This study was conducted to determine genotypes with strong drought tolerance and high and stable yield characteristics from different wheat lines under drought stress conditions. Using a randomized block design, 14 different genotype wheat lines were tested at Mazhuang Experimental Farm of Tai’an Academy of Agricultural Sciences during 2022-2023. The experiment set up drought and irrigation treatments, based on dryland yield and irrigation yield, and adopted mean productivity (MP), geometric mean productivity (GMP), drought resistance coefficient (DRC), drought resistance index (DRI), and stress tolerance index (STI) to compare the drought resistance of different lines. The result showed that according to the values and ranks of different drought indicators for different lines, genotypes V7, V14, V2, and V12 ranked higher, demonstrating high and stable yield performance. The STI, GMP, and MP indicators were significantly positively correlated with both dryland yield and irrigation yield and exhibited good yield consistency. Both principal component analysis and cluster analysis further clarified the drought\|tolerant, high\|yield, and stable\|yield characteristics of these genotypes. This study demonstrated that under drought and irrigation conditions, the STI, GMP, MP, and DRI indicators were effective for identifying and classifying drought\|tolerant and high\|yielding genotypes. By comprehensively utilizing these four drought\|resistance indicators, the drought\|tolerant and high\|yielding lines V7, V14, V2, and V12 were identified, with drought resistance grades of 1, 2, 2, and 1, respectively. |
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