小麦异交群体连续歧化选择的遗传效应  

Genetic Effect of Continuous Divergent Selection in Cross -Bred Population of Wheat ( Triticum aestivum L.)

作　　者：史晓红[1] 郭平仲[2] 

机构地区：[1]卫生部北京医院 [2]首都师范大学生物系,北京100037

出　　处：《首都师范大学学报（自然科学版）》2003年第1期60-63,66,共5页Journal of Capital Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目 ( 39570382 );并且是硕士学位论文的一部分 .

摘　　要：利用太谷核不育基因构建的遗传变异丰富的基础群体DNS2 ,进行了连续五轮歧化选择 .本文综合选择结果 ,研究株高等性状在连续歧化选择中的效应 .农艺性状的数量分析结果表明 ,各选择性状进展基本上与预期选择方向相符 ,选择同时引起了群体间非选择性状的差异 .综合分析表明 ,对增加株高、增加或降低小穗密度的选择效应比较明显 .对株高的二向选择引起了性状间相关程度的变化 .A base population was established through multi -parent croosing by using Taigu dominant male -sterile wheat, and then five cycles of 2 -way selection for four quantitative characters were conducted. The divergence of agronomic characters is the open -pollinated wheat population was studied by quantitative analysis. ;The results of quantitative analysis for agronomic characters showed each selective character basically made progress in correspondence to the way as expected. Selection also caused the divergence among the characters, which were not selected. The selective effect was evident for the selection of increasing the height of plant, and both increasing and decreasing the density of spikelet. Accompany with the selection of plant height, some correlated characters changed. According to the results of multiple regression analysis and correlation analysis, the number of grains per plant, the kernel weight per head and the number of kernels per head had significant effects on the grain yield per plant.

关 键 词：小麦 异交群体 连续歧化选择 遗传效应 太谷核不育基因 数量性状 遗传变异 农艺性状 

分 类 号：S512.1[农业科学—作物学] Q321[生物学—遗传学]