| Comprehensive evaluation of drought resistance in maize varieties based on three water conditions |
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| DOI：10.7606/j.issn.1000-7601.2022.01.19 |
| Key Words: maize drought resistance DRI comprehensive evaluation |
| Author Name | Affiliation | | ZHANG Wenxin | Northwest A&F University, College of Agronomy, The key Laboratory of Biology and Genetics Improvement of Maize in Arid Area of Northwest Region, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | DUAN Yingxin | Northwest A&F University, College of Agronomy, The key Laboratory of Biology and Genetics Improvement of Maize in Arid Area of Northwest Region, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | ZHANG Shuang | Northwest A&F University, College of Agronomy, The key Laboratory of Biology and Genetics Improvement of Maize in Arid Area of Northwest Region, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | YANG Jingqi | Northwest A&F University, College of Agronomy, The key Laboratory of Biology and Genetics Improvement of Maize in Arid Area of Northwest Region, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | ZHANG Jianjun | Gansu Academy of Agricultural Sciences,Lanzhou, Gansu 730000, China | | HUANG Rui | Dryland Agriculture Research Center, Shanxi Academy of Agricultural Sciences, Taiyuan, Shanxi 030031,China | | YANG Xiaojun | Yulin Academy of Agricultural Sciences, Yulin, Shaanxi 719000, China | | WANG Fugui | Inner Mongolia Agricultural University, Agricultural College, Hohehot Municipality, Inner Mongolia 010000, China | | XUE Jiquan | Northwest A&F University, College of Agronomy, The key Laboratory of Biology and Genetics Improvement of Maize in Arid Area of Northwest Region, Ministry of Agriculture, Yangling, Shaanxi 712100, China | | ZHANG Xinghua | Northwest A&F University, College of Agronomy, The key Laboratory of Biology and Genetics Improvement of Maize in Arid Area of Northwest Region, Ministry of Agriculture, Yangling, Shaanxi 712100, China |
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| Abstract: |
| To identify the drought resistance ability for different maize varieties and select strong drought resistance varieties accurately, a systematic study about drought resistance was conducted at adult and seedling stages for 8 maize varieties based on field experiment, drought shed and PEG simulating drought stress hydroponic experiment. By investigating and analysis of agronomic characters, physiological indexes and yield characters under threecontrolled water conditions, varieties with better comprehensive drought resistance were screen out. These results showed, under 2 years 5 pilot field tests and 2 years dry shed experiments, the varieties including Jiushenghe 2468, Shandan 650, Lianchuang 825 and MC703 performed large drought resistance index (DRI) with higher yields under drought and irrigation conditions. The DRI for each variety was 0.910, 0.909, 0.907 and 0.873 in the field conditions respectively, which had shorter powder separation (ASI) and more dry matter with higher SPAD. Based on the hydroponic test,the varieties of Shandan 650, Xinyu 335, Jiushenghe 2468 and MC703 were selectedas drought resistant varieties,and its membership was 0.871, 0.697, 0.680 and 0.596, respectively. This group had more developed roots and strong physiological enzymatic activities. Combining the identification results of the first traits (yield, DRI) with the second traits (root, ASI, physiology) under three controlled water conditions, MC703, Jiushenghe 2468 and Shandan 650 were selected as drought resistant varieties. |
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