畜牧兽医学报 ›› 2016, Vol. 47 ›› Issue (3): 449-456.doi: 10.11843/j.issn.0366-6964.2016.03.005

• 遗传繁育 • 上一篇    下一篇

绵羊线粒体基因变异与产羔数性状的关联分析

陈晓勇1,2,孙洪新2,袁明3,康振江3,敦伟涛2*,赵兴波1*   

  1. (1.中国农业大学动物科技学院,北京 100193; 2.河北省畜牧兽医研究所,保定 071000;3.河北省畜牧良种工作站,石家庄 050000)
  • 收稿日期:2015-03-12 出版日期:2016-03-23 发布日期:2016-03-23
  • 通讯作者: 敦伟涛,研究员,E-mail:dwt_12323@sohu.com;赵兴波,教授,E-mail:zhxb@cau.edu.cn
  • 作者简介:陈晓勇(1980-),男,河北滦县人,高级畜牧师,博士,主要从事动物遗传繁育及其生物技术研究,E-mail:chenxiaoyong-2000@163.com
  • 基金资助:

    转基因生物新品种培育重大专项(2014ZX08009-002);河北省科技支撑计划项目(14226315D;15226308D)

Association Analyses between Mitochondrial Coding Gene Variations and Sheep Litter Size

CHEN Xiao-yong1,2,SUN Hong-xin2,YUAN Ming3,KANG Zhen-jiang3,DUN Wei-tao2* ,ZHAO Xing-bo1*   

  1. (1.College of Animal Science and Technology,China Agricultural University,Beijing 100193,China;2.Institute of Animal Science and Veterinary of Hebei Province,Baoding 071000,China;3.Workstation of Animal Science Breeds of Hebei Province,Shijiazhuang 050000,China)
  • Received:2015-03-12 Online:2016-03-23 Published:2016-03-23

摘要:

本研究旨在分析mtDNA变异与产羔数性状的关系。以杜泊、陶赛特、萨福克绵羊为研究对象,通过线粒体基因组测序、基因型分析等技术发现,杜泊羊线粒体基因组编码区存在25个突变位点,包括rRNA突变位点2个,tRNA突变位点2个,多肽编码基因突变位点21个(包括错义突变9个和同义突变12个);陶赛特羊线粒体基因组编码区存在20个突变位点,包括rRNA突变位点5个,tRNA突变位点1个,多肽编码基因突变位点14个(包括错义突变3个和同义突变11个);萨福克羊线粒体基因组编码区存在77个突变位点,包括rRNA突变位点7个,tRNA突变位点3个,多肽编码基因突变位点67个(包括错义突变7个和同义突变60个)。杜泊、陶赛特绵羊mtDNA各突变位点均与产羔数关联不显著;萨福克绵羊中发现的14个变异位点与产羔数显著相关(P<0.05),其中单个突变位点(T7759C)和单倍型(ATTCATTAAACTTT)最大效应均为0.22只•胎-1。结果表明,杜泊、陶赛特绵羊产羔数性状线粒体基因效应不显著;萨福克绵羊mtDNA变异与产羔数显著相关。

Abstract:

The aim of the present study was to explore the effects of mtDNA on litter size in sheep.Genome sequencing and genotyping technologies were used for DNA variation analyses on mitochondrial coding genes in Dorper,Dorset and Suffolk sheep.In Dorper sheep,twenty-five mtDNA variations were detected,including 2 mutations in rRNA and tRNA genes,respectively,and 21 variations in polypeptide-coding genes(including 9 missense mutations and 12 synonymous mutations).For Dorset sheep,totally 20 variations,including 5 mutations in rRNA genes,1 mutation in tRNA genes,and 14 substitutions in polypeptide-coding genes(including 3 missense mutations and 11 synonymous mutations) were detected.In Suffolk sheep,there were 77 mutations in mtDNA coding genes,including 7 and 3 substitutions in rRNA and tRNA genes,and 67 mutations in polypeptide-coding genes which contained 7 missense mutations and 60 synonymous mutations.The mtDNA mutations presented poor associations with litter size in Dorper and Dorset sheep.However,in Suffolk sheep,14 mtDNA mutations were significantly associated with litter size(P<0.05),which both of the maximal values for the effects of the single mutation(T7759C) and haplotype(ATTCATTAAACTTT) were 0.22 per parity.The mtDNA had poor effects on litter size in Dorper and Dorset sheep.Mitochondrial DNA variations were significantly associated with litter size in Suffolk sheep.

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