甘蓝型油菜半矮秆材料3862Sd的选育及遗传鉴定

摘要

In order to provide basic materials of rapeseed breeding, a dwarf mutant selected from5824 CA×5771 Rhybridized combination in comparison test of rape varieties in 2008 was bred after six years' systematic breeding.Its hereditary was analyzed by Chi-square test.Results:It is named as 3862 Sd with genetic stability and 135 cm plant height.The plant height of reciprocal cross F1 from 3862 Sd×traditional high-stalk rape variety is less than the mid-parent value and tends to the dwarf parent.The segregation ratio of tall and dwarf plants in corresponding F2 and BC1 F1 population accords with 1:3 and1:1, which indicates that the dwarf trait of 3862 Sd is mainly controlled by apair of incomplete dominant genes.%为油菜育种提供基础材料, 2008年春在品种比较试验的杂交组合5824CA×5771R中发现1株矮秆突变株, 经过6年系统选育, 利用卡方测验分析其遗传性.结果表明:于2014年成功育成株高约为135cm的遗传稳定半矮秆材料, 暂定名为3862Sd (Semi-dwarf).利用3862Sd与高秆常规油菜品系正反交F1的株高小于中亲值, 偏向矮秆亲本, 相应的F2及BC1F1群体高秆株与矮秆株分离比例符合1:3、1:1的期望值, 表明3862Sd的矮秆性状主要受1对不完全显性基因控制.