β4-defensin-i1和DGAT2-i6基因与奶牛产奶性能的相关分析  

Analysis of the Correlation between the Gene of β4-defensin-i1,DGAT2-i6 and the Performance of Dairy Cattle Milk Production

作　　者：许惠[1] 谈成[1] 魏建生 刘德武[1] 闫俊亮 

机构地区：[1]华南农业大学,广州510642 [2]广东温氏乳业有限公司,肇庆526072

出　　处：《中国奶牛》2010年第10期3-5,共3页China Dairy Cattle

基　　金：温氏食品集团科研基金项目(070708E)

摘　　要：本试验以382头荷斯坦牛DNA样本和产奶量记录为试验材料,用PCR-RFLP方法对与产奶性状有关的主要候选基因β4-defensin-i1和DGAT2-i6进行多态性分析,并对标记位点基因型与产奶量进行了相关分析。结果表明:在所研究的两个基因中,BB基因型个体305d产奶量显著低于AA型和AB型个体(P<0.05),AA和AB基因型个体间产奶量差异不显著(P>0.05)。In this experiment,the DNA samples and the milk yield records of 382 Holstein cows were used as the materials,taking β4-defensin-i1 and DGAT2-i6 as the research object to study the polymorphism of the two genes and their relations to the cows’ milk performance.The result shows that about the two genes,the milk yield of the BB gene type individuals in the 305 days lactation is higher than the AA and AB gene types individuals conspicuously（P〈0.05）,but the difference of the milk yield between the AA and AB gene type individuals is not significant（P〉0.05）.

关 键 词：荷斯坦牛 产奶量 PCR-RFLP β4-defensin-i1 DGAT2-i6 多态性 

分 类 号：S823[农业科学—畜牧学]