| Screening of drought resistance traits and drought resistance evaluation in wheat advanced lines |
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| DOI：10.7606/j.issn.1000-7601.2024.01.02 |
| Key Words: wheat drought resistance index agronomic traits yield traits cluster analysis |
| Author Name | Affiliation | | SONG Luxing | College of Agronomy, Northwest A&F University, State Key Laboratory of Crop Stress Biology in Arid Areas, China Institute of Water Saving Agriculture in Arid Areas, Yangling, Shaanxi 712100, China | | ZHANG Shanshan | College of Agronomy, Northwest A&F University, State Key Laboratory of Crop Stress Biology in Arid Areas, China Institute of Water Saving Agriculture in Arid Areas, Yangling, Shaanxi 712100, China | | LI Xuan | College of Agronomy, Northwest A&F University, State Key Laboratory of Crop Stress Biology in Arid Areas, China Institute of Water Saving Agriculture in Arid Areas, Yangling, Shaanxi 712100, China | | QIAO Pengfang | College of Agronomy, Northwest A&F University, State Key Laboratory of Crop Stress Biology in Arid Areas, China Institute of Water Saving Agriculture in Arid Areas, Yangling, Shaanxi 712100, China | | BI Qi | College of Agronomy, Northwest A&F University, State Key Laboratory of Crop Stress Biology in Arid Areas, China Institute of Water Saving Agriculture in Arid Areas, Yangling, Shaanxi 712100, China | | CHEN Liang | College of Agronomy, Northwest A&F University, State Key Laboratory of Crop Stress Biology in Arid Areas, China Institute of Water Saving Agriculture in Arid Areas, Yangling, Shaanxi 712100, China | | HU Yingang | College of Agronomy, Northwest A&F University, State Key Laboratory of Crop Stress Biology in Arid Areas, China Institute of Water Saving Agriculture in Arid Areas, Yangling, Shaanxi 712100, China |
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| Abstract: |
| During the growing seasons of 2020-2021 and 2021-2022, 43 and 20 wheat advanced lines were respectively evaluated for 8 agronomic traits and 8 yield traits in three different environments: Drought shelter(DS), Yangling Agricultural Station 1(YAS) and Qianxian(QX). The contribution of each trait to wheat drought resistance was assessed by calculating the drought resistance index. Comprehensive analyses were performed using methods such as the membership function and cluster analysis to select wheat advanced lines with high drought resistance.The results indicated that under drought stress(DS), both agronomic and yield traits of wheat were suppressed to varying degrees. Based on the contribution of each trait to wheat drought resistance, several important indicators for evaluating wheat drought resistance, such as biomass, yield, spikelet number, and thousand\|grain weight were selected. Through comprehensive drought resistance index (D) and cluster analysis, the tested wheat varieties (lines) were categorized into five levels: highly drought\|resistant, drought\|resistant, moderately drought\|resistant, drought\|sensitive, and highly drought\|sensitive. In the two years of assessment, a total of 6 highly drought\|resistant wheat lines including 21-1, 21-34, 21-39, 21-18, 21-2, and 22-17 were identified. |
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