畜牧兽医学报 ›› 2013, Vol. 44 ›› Issue (8): 1205-1212.doi: 10.11843/j.issn.0366-6964.2013.08.005

• 遗传繁育 • 上一篇    下一篇

务川黑牛STAT3基因启动子区SNPs与生长相关性状的关联分析

杨永强1,焦仁刚2,龚俞2,谢海强1,惠嫣婷1,张依裕1,肖超能1,刘若余1*   

  1. (1. 贵州大学动物科学学院/高原山地动物遗传育种与繁殖教育部重点实验室/贵州省动物遗传育种与繁殖重点实验室,贵阳 550025; 2. 贵州省畜牧技术推广站,贵阳 550001)
  • 收稿日期:2013-01-14 出版日期:2013-08-23 发布日期:2013-08-23
  • 通讯作者: 刘若余,E-mail:liury04@163.com
  • 作者简介:杨永强(1989-),男,四川威远人,硕士生,主要从事分子遗传与动物育种研究,E-mail:yangyongqiang2000@126.com
  • 基金资助:

    贵州省重大科技专项计划项目(黔科合重大专项字[2011]6009号)

Associations of Polymorphisms of Promoter Region of STAT3 Gene with Growth Traits in Wuchuan Black Cattle

YANG Yong-qiang1, JIAO Ren-gang2, GONG Yu2, XIE Hai-qiang1, HUI Yan-ting1, ZHANG Yi-yu1, XIAO Chao-neng1, LIU Ruo-yu1*   

  1. (1. Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education/ Guizhou Key Laboratory of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guizhou University, Guiyang 550025, China; 2. Animal Science and Technology Station of Guizhou, Guiyang 550001, China)
  • Received:2013-01-14 Online:2013-08-23 Published:2013-08-23

摘要:

为筛选STAT3基因启动子区SNPs及研究其对启动子功能元件和体尺性状的影响。选择品种差异较大的贵州荷斯坦奶牛和务川黑牛构建不同DNA池,直接测序筛选SNP位点,PCR-RFLP进行验证和基因分型,并利用114头务川黑牛个体分析SNPs位点与8个体尺性状的相关性。结果表明:STAT3基因5′调控区存在7个新SNPs位点,分别为:G-449AC-341AA-322GC-246AG-240AC-225TA-103T,提交SNP数据库得到登录号。生物信息学软件预测得到STAT3基因核心启动子区和CpG岛,SNP位点导致附近大量转录因子结合位点消失和新位点产生。多态性位点对转录因子结合位点有显著影响,但并不改变CpG岛大小。关联性分析结果表明,A-322G对务川黑牛体重有极显著影响(P<0.01),A等位基因为有利等位基因。与AAGG纯合基因型相比,AG基因型个体有更出色的体重性状。A-322G可能作为影响肉牛生长性状的重要功能性SNPSTAT3基因可能作为肉牛选种选育的候选基因,研究结果为进一步确定STAT3基因功能奠定试验基础。

Abstract:

The study aimed to screen the SNPs in the promoter region of STAT3 gene in cattle and analyze the effect of SNPs on function elements of promoter and growth traits. Two cattle breeds (Wuchuan Black cattle and Guizhou Holstein cow) that possessed significant difference in breeds property were selected to construct DNA pools, SNP sites were screened by direct sequencing subsequently. PCR-RFLP was used to be genotyping and a total of 114 Wuchuan Black cattle were used to study the associations of SNPs with 8 growth traits. Results showed that 7 new single nucleotide polymorphism (SNP) sites including G-449A, C-341A, A-322G, C-246A, G-240A, C-225T and A-103T, respectively were found in the 5' flanking region of STAT3 gene and then submitted the information of SNPs to NCBI to obtain accession numbers. Furthermore, bioinformatics tools were used to predict the core region of the promoter and CpG island. SNPs found in this study led to the disappearance of a large amount of transcription factors bingding sites and the appearance of new sites, it also showed that SNP mutation didnt affect the range of CpG island dramaticlly by using various softwares. Association analysis demonstrated that A-322G had highly significant effects on body weight (P<0.01), A allele was the favorable alleles. Moreover, animals with the genotype AG had the highest mean body weight than those with GG and AA genotypes, which suggested that A-322G was an important SNP marker affecting the cattle growth performance and STAT3 gene could be applied in marker-assisted selection for improving growth performance in cattle. This work could lay the experimental foundation for the identification of function of STAT3 gene in cattle.

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