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中国农学通报 ›› 2020, Vol. 36 ›› Issue (7): 6-10.doi: 10.11924/j.issn.1000-6850.casb18110087

所属专题: 玉米

• 农学·农业基础科学 • 上一篇    下一篇

水分胁迫对不同抗旱型玉米自交系苗期生长的影响

张富国1, 王怀苹2()   

  1. 1 浚县农业局,河南浚县 456250
    2 鹤壁市农业科学院,河南鹤壁 458030
  • 收稿日期:2018-11-21 修回日期:2019-02-20 出版日期:2020-03-05 发布日期:2020-03-02
  • 通讯作者: 王怀苹
  • 作者简介:张富国,男,1965年出生,高级农艺师,大专,主要从事农业技术推广工作。通信地址:456250 河南省浚县新华路119号,E-mail:13939262133@163.com。

Drought Stress and Drought-resistant Maize Inbred Lines: Effects on Growth at Seedling Stage

Zhang Fuguo1, Wang Huaiping2()   

  1. 1 Xunxian Agricultural Bureau, Xunxian Henan 456250
    2 Hebi Academy of Agricultural Sciences, Hebi Henan 458030
  • Received:2018-11-21 Revised:2019-02-20 Online:2020-03-05 Published:2020-03-02
  • Contact: Huaiping Wang

摘要:

通过水分胁迫处理对不同抗旱型玉米自交系苗期的影响研究,为抗旱育种选择自交系提供选择参考。采用人工控水的方法,研究干旱胁迫对夏玉米抗旱型和对敏感型自交系苗期株高、地上部和地下部分干重、叶面积、比叶重、叶绿素和净光合速等的影响。结果表明:不同抗旱型自交系苗期对水分胁迫的响应不同。抗旱玉米自交系从5叶期开始在干旱胁迫期间的株高、地上部和地下部分干重、叶面积、叶绿素和净光合速率等指标均高于对水分敏感的玉米自交系,且比叶重相对稳定。这表明干旱条件下,抗旱型自交系较普通自交系在苗期能够表现出更好的适应性,本研究对加强抗旱自交系的筛选和选育,进一步提高耐旱节水玉米新品种选择效率具有一定参考价值。

关键词: 抗旱型玉米自交系, 苗期, 水分胁迫, 形态指标, 光合速率, 抗旱性

Abstract:

The effects of water stress on different drought-resistant maize inbred lines were studied at seedling stage, in order to provide reference for the selection of inbred lines for drought-resistant breeding. We studied the effects of drought stress on height, dry weight, leaf area, specific leaf weight, SPAD and net photosynthetic rate of drought-resistant and water-sensitive inbred lines of summer maize by using artificial water control. The results showed that: different drought-resistant varieties at seedling stage had different responses to water stress; under water stress, drought-resistant maize varieties showed obvious advantages, the plant height, dry weight of shoot and underground parts, leaf area, SPAD and net photosynthetic rate of drought-resistant maize varieties since five-leaf stage were higher than those of water-sensitive maize variety, and its specific leaf weight was relatively stable, indicating that compared with common inbred lines, the drought-resistant variety had better adaptability at seedling stage under drought condition. The study could enhance the selection and breeding of drought-resistant inbred lines and further improve the selection efficiency of drought-resistant and water-saving maize varieties.

Key words: drought-resistant maize inbred lines, seedling stage, water stress, morphological indexes, photosynthetic rate, drought resistance

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