6个白鹅品种GH基因第2外显子多态性研究

以太湖鹅、扬州鹅、豁眼鹅、浙东白鹅、皖西白鹅和四川白鹅6个鹅品种为试验材料,根据鸭、鹅GH基因序列设计1对扩增第2外显子的引物,用PCR-SSCP方法进行单核苷酸多态性分析,并对不同品种进行群体遗传学分析。结果表明,在鹅GH基因第2外显子上共发现2个单碱基突变位点,第39处的T-C突变,未发生氨基酸变化,为沉默突变;第74处T-C单碱基突变导致第25个氨基酸由缬氨酸(V)变为丙氨酸(A)。鹅群中表现出10种基因型(AA、AB、AC、AD、BB、BC、BD、CC、CD、DD)。统计结果发现10种基因型在6个鹅品种间分布存在极显著的差异(P<0.01)。所有品种均处于Hardy-Weinberg平衡状态。群体遗传分析表明太湖鹅杂合度、有效等位基因数、多态信息含量最低,浙东白鹅最高;除太湖鹅为中度多态外,其他品种均为高度多态。本研究表明鹅GH基因在不同品种中具有丰富的单核苷酸多态性,可以进一步作为候选基因来分析其与生产性状的相关性。

Polymorphism in exon 2 of GH gene in six white geese

In this experiment,one pair of primers in exon 2 based on sequence of GH gene of goose and duck was designed to detect the single nucleotide polymorphisms(SNPs) by the technique of single strand conformation polymorphism(SSCP) and the genetic polymorphism was analyzed,taken six goose breeds(Taihu goose,Yanzhou goose,Huoyan goose,Zhedong White goose,Wanxi White goose and Sichuan White goose)as material.Two single nucleotide polymorphism sites were discovered in exon 2.T39C variation did not cause the change ...