陆地棉开花成铃性状的遗传研究 Ⅲ.不同发育阶段的遗传规律  

Genetic Analysis on Flowering and Boll Setting in Upland Cotton (Gossypium hirsutum L.) Ⅲ. Genetic Behavior at Different Developing Stages

作　　者：叶子弘[1] 朱军[1] 

机构地区：[1]浙江大学农学系,杭州310029

出　　处：《Acta Genetica Sinica》2000年第9期800-809,共10页

基　　金：国家自然科学基金!(39670390)

摘　　要：对4个陆地棉品种（系）双列杂交实验的2年观察资料按包括基因型×环境互作的加性-显性遗传模型进行不同发育阶段开花成铃规律的遗律的遗传分析。方差分析表明，开花成铃早期主要受显性效应控制，至中后期加性效应作用逐渐增强，基因型Ｘ环境互作效应相对较小，不同育阶段平均开花成铃数与总铃数的相关分析表明，8月1日前加性相关系数为负数或零值，但存在显著或极显著的显性正相关，8月1日后则相反。不同发育阶段平均开花成铃数的条件遗传分析发现：不同时期的基因活动强度不同，7月下旬及8月上中旬最大；检测间隔（t杒）对探讨花铃期基因活动规律有重要作用；选择调查周期时应兼顾实验目的、实验环境条件、入选性状及所处的发育阶段。An additive-dominant genetic model with genotype by environment interaction was employed to analyze the genetic behavior of flowering and fruiting at different development stages, with 2-year data from 4? diallel crosses. The results of variance analysis indicated that flowering and fruiting behaviors were mainly controlled by dominant effects at early period, but by additive effects later on. Compared with genetic main effects, GE interaction effects playeda minor role on the flowering and fruiting behavior. The analysis of covariance between average flower number, boll number at different development stages and total number of bolls showed that there were significant positive dominant correlation and negative or zero additive correlation before August lst, but having the opposite results afterward. Interaction correlation existed during the whole period. It was found, by further analysis of conditional variances, that different development stages have diverse gene action intensity. The last ten days of July and the first-middle ten days of August had the highest gene action level. Time interval of investigation played a great role on exploring the law of gene action during the flowering and fruiting period; when selecting the time interval of investigation, it is necessary to contemplate the purpose of the experiment, environmental condition, investigating traits and developing period simultaneously.

关 键 词：发育阶段 开花数 成铃数 遗传方差 陆地棉 

分 类 号：S562.03[农业科学—作物学]