不结球白菜叶子重量性状遗传模型分析  

Genetic model analysis of leaf-weight traits in non-heading Chinese cabbage (Brassica campestris ssp. chinensis Makino)

作　　者：韩建明[1] 侯喜林[1] 史公军[1] 耿建峰[1] 邓晓辉[1] 

机构地区：[1]南京农业大学作物遗传与种质创新国家重点实验室

出　　处：《遗传》2007年第9期1149-1153,共5页Hereditas（Beijing)

基　　金：国家自然科学基金资助项目(编号:30671420);南京农业大学作物遗传与种质创新国家重点实验室开放课题(编号:ZW2005007)~~

摘　　要：应用主基因+多基因6个世代联合分离分析方法,对不结球白菜SI×秋017组合的叶片重和叶柄重性状进行了分析。结果表明,SI×秋017组合的叶片重性状遗传受1对负向完全显性主基因+加性-显性多基因(D-4)控制,主基因加性效应为1.8991,显性效应为-1.8991;多基因加性效应为-1.2934,显性效应为1.7933;势能比值为-1.3865,显性度为-1.0000;B1、B2和F2世代群体叶片重的主基因遗传率分别为6.98%、4.33%和36.08%;B1、B2和F2世代群体叶片重的多基因遗传率为16.03%、7.39%和23.96%。叶柄重的遗传受1对加性主基因+加性-显性多基因(D-2)控制,主基因加性效应为-1.1457,显性效应为0;多基因加性效应为1.3472,多基因显性效应为2.5788;势能比值为1.9142,显性度为0。B1、B2和F2世代群体叶柄重的主基因遗传率分别为31.72%、5.27%和57.94%。B1、B2和F2世代群体叶柄重的多基因遗传率分别为0.42%、4.59%和4.80%。对SI×秋017组合叶片重性状的改良要在晚代选择;对叶柄重的改良要以主基因为主,可在早代选择。The mixed major-gene plus polygene inheritance model was used to analyze the genetics of leafblade-weight and petiole-weight trait in SIxQiu017 of non-heading Chinese cabbage. The results showed that the leafblade-weight trait was controlled by one pair of negative complete dominant major genes plus additive-dominant polygene （D-4）. The additive effect in the major gene was 1.8991, the dominant effect was -1.8991; the additive effect in the polygene was -1.2934, and the dominant effect was 1.7933; the potential ratio was -1.3865, and the dominant degree was -1.0000; the heritability of the major gene was 6.98% in B1 generation, 4.33% in B2 generation, and 36.08% in F2 generation; the heritability of the polygene was 16.03% in B1 generation, 7.39% in B2 generation, and 23.96% in F2 in the leafblade-weight trait. The petiole-weight trait in SIxQiu017 was controlled by one pair of additive major genes plus additive-dominant polygene （D-2）. The additive effect in major gene was -1.1457, the dominant effect was 0.0000; the additive effect in polygene was 1.3472, and the dominant effect was 2.5788. The potential ratio was 1.9142, and the dominant degree was 0.0000; the heritability of the major gene was 31.72% in B1 generation, 5.27% in B2 generation, and 57.94% in F2 generation. The heritability of the polygene was 0.42% in B1 generation, 4.59% in B2 generation, and 4.80% in F2 in the petiole-weight trait. The improvement of leaf-weight trait of SI×Qiu017 should be selected in late generation, and the improvement of petiole-weight trait of SI×Qiu017 should be selected in early generation.

关 键 词：不结球白菜 叶片重 叶柄重 主基因+多基因 遗传模型 

分 类 号：S634[农业科学—蔬菜学]