Screening in Southwest China of drought-resistant varieties of maize at the seedling stage

doi:10.11686/cyxb20140107

Abstract

Abstract: To screen for drought-resistant varieties of maize (Zea mays),thirty hybrid maize varieties in large-scale cultivation in Southwest China were treated with PEG to simulate drought stress in pot cultures and hydroponics. The strongly drought resistant varieties were selected by fuzzy membership function. Drought-resistant indexes were screened and evaluated by a drought variability index. Eight varieties such as Yayu No.10 and Zhenghong 311 were classified as drought-resistant. Leaf area,root/shoot ratio,root traits (root volume,the number of root branches,and root length),relative conductivity,water loss rate of cutting leaves,proline,chlorophyll and chlorophyll fluorescence parameters (F_v/F_m,F_q'/F_m',F_v'/F_m',F_q'/F_v') were sensitive to drought stress,and could be used in evaluation indexes of drought resistance at the maize seedling stage.

CLC Number:

S816

TIAN Shan-jun,YANG Shi-min,KONG Fan-lei,YUAN Ji-chao. Screening in Southwest China of drought-resistant varieties of maize at the seedling stage[J]. Acta Prataculturae Sinica, 2014, 23(1): 50-57.

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