| Response of different maize inbred lines seedlings to water stress and Drought tolerance evaluation |
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| DOI：10.7606/j.issn.1000-7601.2018.02.26 |
| Key Words: water stress maize inbred line seedling growth and development physiological characteristics drought tolerance |
| Author Name | Affiliation | | ZHU Zhi-ming | Agricultural College of Ningxia University, Yinchuan, Ningxia 750021, China | | XU Xing | Key Laboratory of Restoration and Reconstruction of the Ministry of Education, Northwest Degradation Ecosystem, Ningxia University, Yinchuan, Ningxia 750021, China | | MAO Gui-lian | Life Science College of Ningxia University, Yinchuan, Ningxia 750021, China |
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| Abstract: |
| 9 maize inbred lines were used as materials to study the effects of soil water stress on the growth and physiological characteristics of Maize Inbred Lines. The drought tolerance of maize inbred lines was evaluated by multivariate analysis. The results showed that: Under water stress, maize inbred lines seedlings responded to drought by external morphology and internal physiological and biochemical changes. And the change of material with strong drought tolerance was less than that of drought tolerance. Principal component analysis (PCA) was used to transform the 6 individual indexes of Maize Seedlings under drought stress into 3 independent indexes. The drought tolerance of maize inbred lines was evaluated. 9 maize inbred lines were divided into three types of drought tolerance, which were drought sensitive, weak drought tolerance, moderate drought tolerance and drought tolerance by using cluster analysis. The regression equation of drought tolerance of maize was established by stepwise regression analysis=-0.107746+0.35003UWC+1.67684WUE-0.05857REC-0.1699Pro, 4 indexes of drought tolerance of Maize under drought stress were selected, namely, water content, water use efficiency, relative electric conductivity, proline content. Under the same adversity stress, the drought tolerance of 4 maize varieties was determined by using the regression equation. Material 8-8-1, KH207 A27-4-2 has strong drought tolerance, and can be used in drought resistance breeding and cultivation. |
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