| Evaluation and selection of drought resistance inbred lines of maize under drought stress |
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| DOI：10.7606/j.issn.1000-7601.2020.05.30 |
| Key Words: maize drought stress drought resistance evaluation elite inbred lines selection |
| Author Name | Affiliation | | ZHOU Yuqian | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | YANG Yanzhong | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | ZHOU Wenqi | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | LIAN Xiaorong | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | ZHANG Yanjun | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | WANG Xingrong | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | KOU Sirong | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | HE Haijun | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | LIU Zhongxiang | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | WANG Xiaojuan | Institute of Crop Sciences, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China |
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| Abstract: |
| Thirty\|nine inbred lines of maize were used for acomprehensive evaluation of drought resistance under drought stress and normal irrigation in Zhangye city, Gansu Province from 2017 to 2018. The results showed that the ASI (Ahthesis\|silking interval) was lengthened in 39 inbred lines under drought stress, and the plant height, earposition height, ear length, ear diameter, ear dry weight, seed dry weight, seed productionrate, and 100-seed weight were decreased under the drought stress.Among them, ear dry weight, grain dry weight, and kernel percentage were significantly reduced by 81.5%, 79.0%, and 88.5% over that of normal irrigation.The ear dry weight, grain dry weight, and kernel percentage were significantly positively correlated with the average drought resistance coefficient, which could be used as the main index for drought resistance identification of maize inbred lines. Ten strong drought\|resistant maize inbred lines were selected by the comprehensive evaluation with weighted drought\|resistant coefficient method, among which inbred lines E28, DH351, long 1222, Xun92-8, and Huangzao 4 were highly drought\|resistant.The drought\|resistant inbred lines selected in this study could be utilized in breeding new drought\|resistant varieties. |
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