| Drought tolerance analysis and identification index screening of different spring wheat varieties |
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| DOI：10.7606/j.issn.1000-7601.2023.06.02 |
| Key Words: spring wheat drought tolerance principal component analysis comprehensive evaluation stepwise regression |
| Author Name | Affiliation | | SHI Jia | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China | | WANG Zhong | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China | | GAO Xin | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China | | ZHANG Hongzhi | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China | | WANG Lihong | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China | | WANG Chunsheng | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China | | XIA Jianqiang | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China | | LI Jianfeng | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China | | FAN Zheru | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China | | ZHANG Yueqiang | Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences/Xinjiang Crop Biotechnology Key Laboratory/Key Laboratory of Desert Oasis Crop Physiology,Ecology and Cultivation, Ministry of Agriculture, Urumqi, Xinjiang 830091, China |
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| Abstract: |
| This study aimed to identify the drought tolerance materials of spring wheat in Xinjiang. The key indicators of drought tolerance were screened and a reliable mathematical evaluation model of drought tolerance was established, which laid a foundation for the selection and breeding of new drought\|tolerant varieties of wheat. In this study, 16 Xinjiang spring wheat varieties were used as research materials, and two treatments were set for drought stress and adequate irrigation. Fifteen related indexes of the whole growth period were measured. The results showed that SPAD3 and CT increased significantly with drought stress, and other indexes decreased to varying degrees with drought stress. The variance analysis indicated that treatment and variety had different degrees of effects on the physiological indexes, agronomic traits and yield index traits of spring wheat varieties. Through principal component analysis, 6 principal components were obtained based on the characteristic value greater than 1, which reflected 82.292% of the original drought tolerance index information. Through the membership function analysis, the comprehensive evaluation value (D value) of drought tolerance of different varieties of wheat was obtained. Then, according to the comprehensive score, the cluster analysis was carried out, and the 16 varieties were clustered into 4 drought\|tolerant types, including 3 varieties were strong drought\|tolerant type, 10 varieties were moderately drought\|tolerant, 2 varieties were weakly drought\|tolerant, and 1 variety was drought\|sensitive. The regression equation D=-2.258+1.299DM3+1.148SPAD3+0.475TKW was established by stepwise regression analysis, and the coefficient of determination of the equation R2=0.962, P=0.0001, this equation can be used for drought tolerance evaluation, DM3, SPAD3, and TKW can be used as the main identification index of drought tolerance test, and the regression equation is used to quickly identify and predict the drought tolerance of varieties. |
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