鸡18周龄体重的主基因+多基因混合遗传模型分析  

Analysis of Major Gene and Polygene Mixed Genetic Model in 18-Week Old Chickens

作　　者：马猛[1] 王克华[1] 曲亮[1] 窦套存[1] 沈曼曼[1] Ma Meng;Wang Kehua;Qu Liang;Dou Taocun;Shen Manman(Institute of Poultry Science of Jiangsu Province,Yangzhou 225003,China)

机构地区：[1]江苏省家禽科学研究所

出　　处：《山东农业科学》2019年第11期139-142,共4页Shandong Agricultural Sciences

基　　金：江苏省现代农业产业技术体系建设项目(JATS[2018]247);现代农业产业技术体系建设专项资金项目(CARS-40-K01);江苏省农业重大新品种创制项目(PZCZ201729)

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。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(P1)and single cockscomb white Leghorn(P2)acted as parents to constructed resource population.The body weight of early laying period at 18-week old of P1,P2,F1 and F2 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.

关 键 词：蛋鸡 资源群体 体重 主基因 多基因 遗传 

分 类 号：S831.2[农业科学—畜牧学]