| Evaluation of drought resistance on maize inbred lines under special drought conditions |
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| DOI：10.7606/j.issn.1000-7601.2016.04.16 |
| Key Words: special drought conditions maize inbred lines drought resistance genetic analysis |
| Author Name | Affiliation | | MENG Qing-li | Agricultural Science Institute of BaojI, Qishan, Shaanxi 722499, China | | ZHAO Ning-juan | Agricultural Science Institute of BaojI, Qishan, Shaanxi 722499, China | | ZHANG Yu-wen | Agricultural Science Institute of BaojI, Qishan, Shaanxi 722499, China | | QU Yang | Agricultural Science Institute of BaojI, Qishan, Shaanxi 722499, China | | ZHANG Hua-feng | Agricultural Science Institute of BaojI, Qishan, Shaanxi 722499, China | | HU Yin-gang | Northwest A&F University/State Key Laboratory of Crop Stress Biology for Arid Areas, Yangling, Shaanxi 712100, China |
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| Abstract: |
| In order to excavate and use drought resistance maize germplasm resources, and to select high yield and drought resistance maize seeds, 58 elite inbred lines had been evaluated on their drought resistance by use of water control during the growth period. Dendrogram of drought resistance and genetic group had been clustered at the same time. The results showed that the yield decreasing range reached 40.6%～100%, and the average yield was decreased by 81.6% under special drought condition. Seed setting rate, ear rows, kernels per row, and seed-producing ratio had significant or very significant correlations with drought resistance coefficients and indexes. They could be used as key indicators of drought resistance of maize inbred lines. 58 inbred lines could be divided into 3 groups according to their drought resistance. K12, PB1139, RD6 had particular resistance ability on drought stress. Inbred lines CL11, ZHENG58, P138, SPECIAL EARLY MAIZE, Ft45-5 had great potential on drought-resistance. In order to use their heterosis, 58 inbred lines could be divided to 2 groups according to their genetic distances. CL11 and ZHENG 58 belonged to A group and K12, PB1139, RD6, Ft45-5, P138 and SPECIAL EARLY MAIZE belonged to B group. |
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