西南地区玉米苗期抗旱品种筛选

doi:10.11686/cyxb20140107

摘要/Abstract

摘要： 为筛选抗旱性强的玉米品种应用于生产,本研究采用盆栽和营养液2种不同培养方式,对30个西南地区大面积种植的杂交玉米品种进行PEG模拟干旱胁迫的苗期试验,通过隶属函数法筛选品种,使用干旱变异指数对抗旱指标进行筛选和评价。结果表明,雅玉10号、正红311等8个品种在几次试验重复中表现均为良好,被归类为抗旱品种。指标中叶面积、根冠比、根系性状(根系体积、根分支数、根长)、相对电导率、离体叶片失水速率、脯氨酸、叶绿素和叶绿素荧光参数(最大光化学效率、实际光化学效率、原初光能捕获效率、光化学淬灭系数)对干旱胁迫较为敏感,可作为玉米苗期抗旱性的评价指标。

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.

中图分类号:

S816

田山君，杨世民，孔凡磊，袁继超. 西南地区玉米苗期抗旱品种筛选[J]. 草业学报, 2014, 23(1): 50-57.

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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