当前位置: 首页 > 文章 > 鸡18周龄体重的主基因+多基因混合遗传模型分析 山东农业科学 2019 (11) 139-142
Position: Home > Articles > 鸡18周龄体重的主基因+多基因混合遗传模型分析 Shandong Agricultural Sciences 2019 (11) 139-142

鸡18周龄体重的主基因+多基因混合遗传模型分析

作  者:
马猛;王克华;曲亮;窦套存;沈曼曼
关键词:
蛋鸡;资源群体;体重;主基因;多基因;遗传
摘  要:
为探索鸡产蛋初期体重的内在遗传变化规律,确定控制产蛋初期体重的主基因对数,本研究以东乡绿壳蛋鸡(P1)和单冠白莱航鸡(P2)为亲本构建F2资源群体,测定亲本(P1、P2)、子一代(F1)和子二代(F2)产蛋初期18周龄体重,运用数量性状主基因+多基因混合遗传模型软件SEA-G4F2对鸡18周龄体重进行遗传分析.结果表明,最适合鸡18周龄体重的主多基因混合遗传模型为两对加性-显性-上位性主基因+加性-显性多基因混合遗传模型,即为24个模型中的E-1模型;主基因遗传力为0.25,多基因遗传力为0.综上,主基因对鸡18周龄体重调控作用远大于多基因.
作  者:
Ma Meng;Wang Kehua;Qu Liang;Dou Taocun;Shen Manman;Institute of Poultry Science of Jiangsu Province;
关键词:
Layer;;Resource population;;Body weight;;Major gene;;Polygene;;Genetic
摘  要:
In order to explore the inherent genetic variation law of body weight at the early laying period and determine the logarithm of major genes, in this study, Dongxiang green-eggshell layer(P_1) and single cockscomb white Leghorn(P_2) acted as parents to constructed resource population. The body weight of early laying period at 18-week old of P_1, P_2, F_1 and F_2 were measured, and the software of SEA-G4 F2 of major gene and polygene mixed genetic model was used to analyse the 18-week old body weight. The results showed that the best model of the chicken body weight at 18-week old was E-1, which named two pairs of additive-dominance-epistatic major-gene plus additive-dominance polygene mixed genetic model. The heritability of major-gene was 0.25, and the polygene heritability was 0. To summarize, major gene had a bigger effect than polygene in 18-week old body weight.

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