Identification and Evaluation of Drought Resistance of Maize Inbred Lines at Seedling Stage under PEG Stress
LU Xiaomin
CAO Liru
ZHANG Xin
ZHANG Qianjin
WEI Xin
GUO Jinsheng
WANG Zhenhua
Abstract：Seventeen maize inbred lines were treated by PEG stress at seedling stage by hydroponic experiments in artificial climate chamber,and leaf relative water content,fluorescence parameters,the activities of SOD,POD,Pro content and plant dry matter weight were determined between control(normal water culture) and PEG stress treatments,the drought resistance identification and classification of 17 inbred lines were done by membership function and clustering analysis method to select seedling drought resistance germplasms,establish drought resistance evaluation system.The results showed that under PEG stress condition,almost all indexes showed a marked change except the PS Ⅱ maximum photochemical quantum Fv/Fm compared to control,leaf relative water content decreased,SOD and POD activities,Pro content increased,the plant dry weight increased,indicating that maize could respond to PEG drought stress by increasing Pro content,the activities of SOD and POD;at the same time,physiological and biochemical indexes reached a significant level among inbred lines under PEG stress condition.Zheng 7024,Zheng 588,L269 and Ji 853 were classified as middle resistant inbred lines,other inbred lines were classified as weak drought resistant inbred lines type by membership function evaluation of drought resistance and the clustering analysis.
Keywords：maize inbred linesseedling stagePEG stressphysiological characteristicsdrought resistancemembership functionclustering analysis
Publication Date：2017-05-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 39-44 )