BMPR—IB基因多态性与湖羊产羔性能的关系
2017-06-11杨媛翁恺麒李拥军顾祝荣郭海燕
杨媛 翁恺麒 李拥军 顾祝荣 郭海燕
摘要[目的]研究骨形态发生蛋白受体IB(Bone morphogenetic protein receptor IB,BMPR-IB)基因多态性与湖羊产羔性能的关系。[方法]采用PCR扩增、酶切和序列测定等方法对湖羊BMPR-IB基因型进行鉴定,并分析BMPR-IB基因型与湖羊产羔数的关系。[结果]共检测出3种基因型,并将其分别定义为AA、AG、GG。测序结果表明,等位基因A与G相比发生了1处碱基突变(A746G)。BMPR-IB基因在湖羊中存在多态性(AA、AG和GG);湖羊中A等位基因的频率为0.032,G等位基因的频率为0.968。AA、AG和GG基因型频率分别为0.006、0.053和0.941。AA、AG和GG基因型湖羊的平均产羔数分别为1.25、1.81和1.96。[结论]BMPR-IB基因可能是湖羊多胎性能的主效基因,可用于对湖羊产羔数的选择。
关键词湖羊;BMPR-IB基因;产羔数
中图分类号S826文献标识码A文章编号0517-6611(2017)26-0113-03
Relationship between Polymorphism of BMPRIB Gene and Lambing Performance of Hu Sheep
YANG Yuan, WENG Kaiqi, LI Yongjun* et al
(College of Animal Science and Technology, Yangzhou University/Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province,Yangzhou,Jiangsu 225009)
Abstract[Objective]To study the relationship between the polymorphism of bone morphogenetic protein receptor IB(BMPRIB) gene and the lambing performance of Hu Sheep.[Method] The genotypes of BMPRIB gene was identified by the methods of PCR amplification,enzyme digestion and sequencing.And the relationship between the genotypes of BMPRIB and litter size of Hu Sheep was analyzed.[Result]Three genotypes were detected, and defined as AA, AG, GG, respectively. The sequencing results showed that the allele A and G had a base mutation (A746G), and there was BMPRIB genes polymorphism (AA, AG and GG) in Hu Sheep. The frequency of A allele in Hu Sheep was 0032, the frequency of G allele was 0.968. The frequencies of AA,AG and GG genotype were 0.006, 0.053 and 0.941,respectively. The average litter size of Hu Sheep with AA, AG and GG genotypes were 1.25, 1.81 and 1.96,respectively. [Conclusion]BMPRIB gene might be the major gene for the prolificacy of Hu Sheep, it could be used to select litter size of Hu Sheep.
Key wordsHu Sheep;BMPRIB gene;Litter size
我國綿羊的遗传资源和饲养数量均位居世界第一,但出栏率仅19.6%,与世界平均水平(35%)相比明显偏低[1-2]。湖羊主要分布在江浙一带,是我国著名的一级保护多胎品种。湖羊具有终年发情的特点,且性成熟较早,一年内可以完成出生、配种、产羔,产羔率能达到200%~250%[3-4]。湖羊的繁殖性状是其主要的经济性状之一,这一性状是由多基因控制,因此寻找控制繁殖性状的主效基因对于提高其经济性状具有重要意义。随着现代分子标记辅助选择技术的发展和应用,湖羊繁殖性状的遗传改良有了新的方向和途径。
早在1980年就有研究表明绵羊的多胎性是由控制繁殖性状的基因发生突变所导致的,并将该突变基因初步命名为FecB,该基因的功能是通过增加排卵数而提高产仔数[5-6]。……
