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PRLR基因外显子10多态性与西农萨能奶山羊产奶性能的相关分析
引用本文:孙瑞萍,王利心,朱广琴,王建刚,宋宇轩,梁昭义,曹斌云. PRLR基因外显子10多态性与西农萨能奶山羊产奶性能的相关分析[J]. 畜牧兽医学报, 2008, 39(12)
作者姓名:孙瑞萍  王利心  朱广琴  王建刚  宋宇轩  梁昭义  曹斌云
作者单位:西北农林科技大学动物科技学院,杨凌,712100
基金项目:国家高技术研究发展计划(863计划),国家奶业重大科技支撑项目 
摘    要:设计4对引物,采用PCR—SSCP技术检测催乳素受体(PRLR)基因外显子10在西农萨能奶山羊群上的单核苷酸多态性,同时研究该基因对其产奶性能的影响。结果表明:引物P2、P3与P4扩增片段具有多态性,P1的扩增片段不存在多态性。应用P2扩增片段,在西农萨能奶山羊中仅检测到AA和AB基因型,纯化测序表明AA与AB基因型相比有2处突变,C27T的突变没有导致氨基酸变化,第189处的碱基缺失导致氨基酸由组氨酸变为酪氨酸和苏氨酸。AA和AB基因型之间产奶量的最小二乘均值差异显著(P〈0.05),AA基因型在各胎次产奶量和平均产奶量等指标上均高于AB基因型,其中第3胎的产奶量达到显著水平(P〈0.05);应用R扩增片段,在西农萨能奶山羊中检测到3种基因型(CC、CD、DD),纯化测序表明CC与DD基因型相比有2处突变(C103A和T106C),分别导致氨基酸由赖氨酸变为苏氨酸、苏氨酸变为异亮氨酸;3种基因型之间产奶量的最小二乘均值差异不显著(P〉0.05)。应用P。扩增片段,在西农萨能奶山羊中也只检测到EE和EF基因型,纯化测序表明EE与EF基因型相比有1处突变(A114G),该突变导致氨基酸由蛋氨酸变为缬氨酸;EE和EF基因型之间产奶量差异显著(P〈0.05)。EE基因型的个体各胎次产奶量均比EF型高,其中在第3、4胎产奶量和前4胎平均产奶量3项指标上都达到显著水平(P〈0.05)。研究结果提示:PRLR基因对奶山羊产奶量有显著影响,因此认为PRLR基因外显子10位点可作为奶山羊高产奶量的标记辅助选择的有效分子标记。

关 键 词:西农萨能奶山羊  PCR—SSCP  催乳素受体基因  产奶性能

Polymorphism of Exon 10 of Prolactin Receptor Gene and Its Relationship with Milk Performance of Xinong Saanen Dairy Goat
SUN Rui-ping,WANG Li-xin,ZHU Guang-qin,WANG Jian-gang,SONG Yu-xuan,LIANG Zhao-yi,CAO Bin-yun. Polymorphism of Exon 10 of Prolactin Receptor Gene and Its Relationship with Milk Performance of Xinong Saanen Dairy Goat[J]. Chinese Journal of Animal and Veterinary Sciences, 2008, 39(12)
Authors:SUN Rui-ping  WANG Li-xin  ZHU Guang-qin  WANG Jian-gang  SONG Yu-xuan  LIANG Zhao-yi  CAO Bin-yun
Affiliation:SUN Rui-ping,WANG Li-xin,ZHU Guang-qin,WANG Jian-gang,SONG Yu-xuan,LIANG Zhao-yi,CAO Bin-yun*(College of Animal Science , Technology,Northwest A&F University,Yangling 712100,China)
Abstract:Prolactin receptor(PRLR) gene was studied as a candidate gene for the milk performance of in Xinong Saanen dairy goat.Four pairs of primers were designed to detect single nucleotide polymorphisms of exon 10 of PRLR gene by PCR-SSCP.The results showed that only the products amplified by primer P1 didn't display polymorphisms.For primer P2,two genotypes(AA and AB) were detected in Saanen dairy goat.Sequencing revealed two mutations of PRLR gene in the genotype AA in comparison to the genotype AB,The mutation ...
Keywords:PCR-SSCP
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