摘要
玉米在萌芽期的抗旱性直接影响到田间的出苗率。本文利用PEG-6000的卷纸法建立玉米萌芽期模拟抗旱筛选系统,根据玉米自交系的芽长、芽重、主根长、根重、总鲜重、总根长及根表面积等性状的综合隶属函数,对248份玉米自交系萌芽期抗旱性进行量化评价。结果表明:新建立的卷纸法玉米萌芽期模拟抗旱筛选系统以20%浓度PEG-6000作为最适浓度。248份玉米自交系的萌芽期抗旱性存在广泛差异,最终筛选出31份抗型和45份中抗型玉米自交系,这些优异的抗旱自交系将为国内玉米自交系抗旱遗传改良提供重要的材料基础。
The drought resistance of maize in the bud stage directly affects the field emergence rate. In this paper, a simulated drought-resistance screening system was established by using PEG-6000 paper roll method. The drought-resistance of 248 maize inbred lines during germination was quantitatively evaluated according to the comprehensive subjection functions of bud length, bud weight, primary root length, root weight, total fresh weight, total root length and root surface area of inbred lines. The results showed that the optimal concentration of 20% PEG-6000 was used in the newly established drought-resistant screening system. There were wide differences in drought resistance of 248 maize inbred lines at the germination stage, and 31 resistant inbred lines and 45 medium resistant inbred lines were finally screened out. These excellent drought-resistant inbred lines will provide an important material basis for drought-resistant genetic improvement of domestic maize inbred lines.
作者
李晶晶
贾腾蛟
王丽艳
李会勇
LI Jingjing;JIA Tengjiao;WANG Liyan;LI Huiyong(Cereal Crop Research Institute,Henan Academy of Agricultural Sciences/Henan Provincial Key Laboratory of Maize Biology,Zhengzhou 450002,China)
出处
《东北农业科学》
2021年第4期6-10,共5页
Journal of Northeast Agricultural Sciences
基金
国家重大转基因专项(2016ZX08003-004)
河南省农业科学院自主创新专项基金(2020ZC05)。
关键词
玉米
萌芽期
抗旱
隶属函数法
Maize
Germination stage
Drought resistance
Membership function analysis
