畜牧兽医学报 ›› 2013, Vol. 44 ›› Issue (11): 1717-1723.doi: 10.11843/j.issn.0366-6964.2013.11.004

• 遗传繁育 • 上一篇    下一篇

山羊GHSR基因多态性及其与体重和体尺性状的相关性研究

宋桃伟,罗卫星*,蔡惠芬,刘彬,孙岩岩   

  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,贵阳 550025)
  • 收稿日期:2013-03-13 出版日期:2013-11-23 发布日期:2013-11-23
  • 通讯作者: 罗卫星,教授,E-mail:ef.wxluo@gzu.edu.cn
  • 作者简介:宋桃伟(1987-),男,贵州湄潭人,硕士生,主要从事分子遗传与动物育种研究, E-mail: songtw400407@126.com
  • 基金资助:

    贵州省农业科技攻关项目[黔科合NY字(2012)3006号]

Polymorphism of GHSR Gene and Its Relationship with Body Weight and Body Size Traits in Goat

SONG Tao-wei, LUO Wei-xing*, CAI Hui-fen, LIU Bin, SUN Yan-yan   

  1. (Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region of Ministry of Education, College of Animal Science, Guizhou University, Guiyang 550025, China)
  • Received:2013-03-13 Online:2013-11-23 Published:2013-11-23

摘要:

本研究旨在探讨GHSR基因SNP与山羊体重和体尺性状的关联性。试验以贵州白山羊和黔北麻羊为研究对象,采用DNA池结合PCR产物直接测序及PCR-SSCP技术检测GHSR基因的单核苷酸多态性。结果发现,在贵州白山羊和黔北麻羊GHSR基因外显子23UTR区检测到2SNPs位点G996AT1424C,其中G996A位点为同义突变,表现为3种基因型,分别命名为GGGAAA,而在外显子15UTR区未发现多态位点。基因型与体重体尺性状关联分析显示,黔北麻羊GGGA基因型个体的体重显著高于AA基因型个体,胸深小于AA基因型个体(P<0.05),其余5个指标均差异不显著(P>0.05);在贵州白山羊中,GG基因型个体的体重、体斜长和管围均显著高于AA基因型个体(P<0.05)。研究结果提示:GHSR基因可能是影响山羊体重的主效基因或与主效基因连锁,G996A位点可望作为提高山羊个体体重的分子遗传标记。

Abstract:

 The aim of this study was to analyze the association of GHSR gene polymorphisms with body weight and body size traits in goat. Guizhou White goats and Qianbei Ma goats were selected as testing subjects, the DNA pooling was constructed, the direct sequencing technology of PCR products and PCR-SSCP were used to detect the single nucleotide polymorphism of GHSR gene. The result showed that G996A and T1424C were detected in exon 2 and 3UTR but no SNPs in exon1 and 5UTR of GHSR gene in these goat breeds, respectively. The G996A was a sense mutation and devided into three genotypes:GG, GA and AA. The study of relationships between genotypes and body weight and body size traits revealed that body weight of individuals of Qianbei Ma goats with genotype GG and GA were significantly higher than those with genotype AA, and chest depth was smaller than those with genotype AA(P<0.05), no significant association of G996A with other indexes was found (P>0.05). Otherwise, the individuals with GG genotype had significantly better body weight, body length and hucklebone width than individuals with genotype AA (P<0.05) in Guizhou White goats. The result indicated that GHSR gene maybe a potential major gene or link to major gene effecting goat body weight, and G996A maybe a candidate molecular marker of MAS.

中图分类号: