| Water-saving physiological characteristics and comprehensive evaluation of new wheat varieties (lines) in northern winter wheat region |
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| DOI：10.7606/j.issn.1000-7601.2019.05.20 |
| Key Words: wheat varieties (lines) normalized difference vegetation index drought resistance evaluation northern winter wheat region |
| Author Name | Affiliation | | ZENG Zhan-kui | College of Agriculture, Henan University of Science & Technology, Luoyang, Henan 471003, China | | WANG Zheng-hong | College of Agriculture, Henan University of Science & Technology, Luoyang, Henan 471003, China | | WANG Li-ming | College of Agriculture, Henan University of Science & Technology, Luoyang, Henan 471003, China | | PANG YU-hui | College of Agriculture, Henan University of Science & Technology, Luoyang, Henan 471003, China | | HAN Zhi-peng | College of Agriculture, Henan University of Science & Technology, Luoyang, Henan 471003, China | | GUO Cheng | College of Agriculture, Henan University of Science & Technology, Luoyang, Henan 471003, China | | WANG Chun-ping | College of Agriculture, Henan University of Science & Technology, Luoyang, Henan 471003, China |
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| Abstract: |
| In order to study the water-saving physiological characteristics and the selection of water-saving varieties of new wheat varieties in the northern winter wheat area under different irrigation conditions, 30 representative wheat varieties (lines) in the northern winter wheat area were studied. The main physiological and agronomic traits were analyzed under water-saving treatment and normal irrigation conditions. The results indicated that, the Normalized Difference Vegetation Index (NDVI) of different wheat varieties (lines) had significant differences in different growth stages after jointing stage. The NDVI at the heading stage had an inflection point, which ensured water supply during this period and was beneficial to prolong leaf function period. Under different irrigation conditions, the variation coefficients of NDVI, leaf area index and light interception were different. Compared with other traits, the generalized heritability was lower, which was 48.61%, 58.51% and 72.84%, indicating that it was greatly affected by the environment. From the gray correlation analysis, it was seen that NDVI, canopy temperature and light interception were highly correlated with yield, these traits were in the forefront. Under normal irrigation conditions, the best varieties (lines) were: CA0391-1, Zhongmai 998, Nongda 211, Zhongmai 175, CA0958, Zhongyou 206, Nongda 5181, Hangmai 247, CA1146, Zhongmai 818 and Jingdong17. Under water-saving treatment, the best varieties (lines) were: Zhongmai 175, Zhongmai 818, CA0391-1, CA1091, Zhongyou 206 and Lunxuan1690. Therefore, the effect of drought stress on wheat can be judged according to the NDVI value. NDVI, canopy temperature and light interception were used as indicators to evaluate the main traits of drought resistance. With the drought-tolerant wheat breeding, CA0391-1, Zhongmai 175, Zhongyou 206 and Zhongmai 818 can be used as drought-resistant breeding parents. |
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