多环境下玉米自交系叶片保绿度不同发育时期的遗传效应分析

The Analysis of Genetic Effects for Leaf Stay-green at Different Developmental Stages under Multi-environments in Maize Inbred Lines

采用包括基因型×环境互作效应的加性-显性遗传模型及非条件和条件的分析方法,研究多环境条件下玉米自交系叶片保绿度不同发育时期的遗传效应及与环境互作效应。结果表明:玉米自交系在吐丝后某一发育时期叶片保绿度与该时段有关基因的遗传表达有关,也与它在该时段以前的叶片保绿度表现有关,同时还受到基因型×环境互作效应的影响。在不同发育时期和环境条件下,控制玉米自交系叶片保绿度基因的表达效应存在差异。

An additive-dominance genetic model with genotype by environment interaction, combined with unconditional and conditional variances approaches, was applied to analyze the developmental genetic behavior in leaf stay-green trait at different developmental stages in maize inbred lines under different environmental conditions. The results indicated that the leaf stay green of maize inbred lines after silking was related to the main genetic effects at that developmental stage, also to those before that developmental stage, also to interactions of genotype by environment. The gene expression differences among different environments and different developmental stages were found for leaf stay-green in maize inbred lines.