利木赞牛抑肌素基因Q204X及nt821突变快速检测方法  

Direct Genotyping of Q204X and nt821 Mutation in Bovine Myostatin Gene

作　　者：徐晶[1] 赵锐峰 李炳霞 赵辉 邱继文 孙志民 李德柏 

机构地区：[1]吉林农业大学动物科技学院,吉林长春130118 [2]长春肉牛发展有限公司,吉林长春130117 [3]山东省潍坊市滨海经济开发区畜牧站,山东潍坊262737

出　　处：《家畜生态学报》2007年第6期38-40,共3页Journal of Domestic Animal Ecology

基　　金：吉林省科技厅资助项目(20020651)

摘　　要：抑肌素(GDF8)是骨骼肌细胞生长的重要负调控因子。抑肌素基因突变是牛"双肌"性状形成的分子遗传基础,在不同牛品种中存在着不同的抑肌素基因突变类型,在利木赞品种中,"双肌"性状主要是抑肌素基因第2外显子的Q204X型突变及第3外显子nt821突变。本研究报道一种新的检测该突变的简便方法。应用突变型与正常型引物在一次PCR反应中同时检测出不同的等位基因。对Q204X突变型PCR产物克隆测序分析表明,该片段确实含有一个能导致抑肌素功能缺陷的Q204X突变。Myostatin（GDF8） is a negative regulator of muscle cell growth. Different mutations in myostatin gene which are responsible for the double muscling phenotype in cattle have been reported. In this article,a new direct genotyping method for the Q204X mutation in exon2 and the nt821 deletion of bovine myostatin gene was reported, which are found in Limousin cattle. Alleles specific primers for mutant and normal gene were used in one PCR assay. The detected mutant fragment was cloned and sequelaced. Sequence analysis showed that the cloned fragment contains the Q204X mutation expected.

关 键 词：抑肌素基因 Q204X突变 nt821突变 利木赞 

分 类 号：S811.5[农业科学—畜牧学]