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。
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.
作者
张富国
王怀苹
Zhang Fuguo;Wang Huaiping(Xunxian Agricultural Bureau,Xunxian Henan 456250;Hebi Academy of Agricultural Sciences,Hebi Henan 458030)
出处
《中国农学通报》
2020年第7期6-10,共5页
Chinese Agricultural Science Bulletin
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
drought-resistant maize inbred lines
seedling stage
water stress
morphological indexes
photosynthetic rate
drought resistance
