| Identification and evaluation of drought tolerance of different maize varieties during flowering stage in Guangxi |
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| DOI：10.7606/j.issn.1000-7601.2019.02.20 |
| Key Words: maize identification of drought resistance drought index drought stress at flowering stage |
| Author Name | Affiliation | | ZOU Cheng-lin | Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China | | TAN Hua | Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China | | ZHENG De-bo | Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China | | ZHAI Rui-ning | Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China | | HUANG Ai-hua | Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China | | MO Run-xiu | Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China | | WEI Xin-xing | Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China | | HUANG Kai-jian | Maize Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China |
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| Abstract: |
| Taking 20 maize varieties in Guangxi as materials, the drought-resistant physiological and biochemical indexes of maize during flowering stage and yield index were determined under drought stress. We synthetically evaluated the drought resistance of the maize flowering stage through the scores from a five-level grading method of drought-resistant physiological and biochemical indexes and drought index of yield. The results showed that five-level grading method composite scores were between 1.9293~5.6595, of which the evaluation scores of Zhengda 619, Guidan 162, and Guidan 0810 were higher than 5.0, followed by Dika 008, Xianyu 30T60, Xianzhengda 901, Qingnong 68, South America No. 1 and Wanchuan 1306 scored between 4.0~5.0. Their drought indexes were between 0.4104~1.0963 among them, Guidan 0810, Pacific 99, and Zhengda 619 were higher than 1.0, followed by Xianyu 30T60, Dika 008 and South America No. 1 were between 0.9~1.0. The relationship between the two kinds of evaluation results was significantly correlated with a coefficient of 0.5887. Thus, five-level grading method and drought index could be used to evaluate drought resistance of maize at flowering stage. Two aspects of the evaluation results showed that Guidan 0810, Zhengda 619, Xianyu 30T60, Dika 008, and South America No. 1 were drought resistant varieties. Among them, Guidan 0810 and Zhengda 619 were strong drought resistant varieties. |
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