| 五个牛品种THRSP基因257C/G突变的遗传多态性研究 |
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| 引用本文： | 张小白,昝林森,王洪宝,郝瑞杰,杨彦杰.五个牛品种THRSP基因257C/G突变的遗传多态性研究[J].中国农业科技导报,2009,11(5):66-70. |
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| 作者姓名： | 张小白 昝林森 王洪宝 郝瑞杰 杨彦杰 |
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| 作者单位： | （1.西北农林科技大学动物科技学院, 陕西 杨凌 712100,2.国家肉牛改良中心, 陕西 杨凌 712100） |
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| 基金项目： | 国家高技术研究发展计划(863计划)，国家科技支撑计划，陕西省13115科技创新工程项目，西北农林科技大学校科研和教改项目 |
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| 摘 要： | 采用PCR-SSCP技术及测序技术,研究了秦川牛、夏南牛、南阳牛、郏县红牛和鲁西牛五个牛品种THRSP基因第一外显子257 bp处C/G突变的遗传多态性及其与肉质性状的关系。结果显示,该位点引发THRSP基因第75位氨基酸发生同义突变,五个牛品种基因频率一致,多态信息含量以南阳牛最高,属于中度多态,其他牛品种属于低度多态。经χ2适合性检验,五个牛品种群体257C/G位点的突变均达到Hardy-Weinberg平衡状态(P>0.05)。关联分析结果显示,AA,AB基因型个体的胴体长、眼肌面积差异显著。该位点可能是影响胴体长和眼肌面积的突变位点或与之紧密连锁,可做为肉牛肉质选育的候选分子标记。
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| 关 键 词： | THRSP基因 PCR-SSCP 秦川牛 分子标记 |
Studies on Polymorphisms of THRSP Gene 257C/G Mutation in Five Cattle Breeds |
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| ZHANG Xiao-bai,ZAN Lin-sen,WANG Hong-bao,HAO Rui-jie,YANG Yan-jie.Studies on Polymorphisms of THRSP Gene 257C/G Mutation in Five Cattle Breeds[J].Journal of Agricultural Science and Technology,2009,11(5):66-70. |
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| Authors: | ZHANG Xiao-bai ZAN Lin-sen WANG Hong-bao HAO Rui-jie YANG Yan-jie |
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| Institution: | (1.College of Animal Science and Technology, Northwest A&F University, Shaanxi Yangling 712100|2.National Beef Cattle Improvement Center, Shaanxi Yangling 712100, China) |
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| Abstract: | Using PCR-SSCP and DNA sequencing techniques, the genetic polymorphism of 257 C/G mutation in THRSP gene exon 1 and its relationship with meat quality traits were studied on five cattle breeds, including Qinchuan cattle, Xianan cattle, Nanyang cattle, Jiaxian red cattle and Luxi cattle. The results showed that this mutation had led to a synonymous mutation in the 75th amino acids. The allele frequency was consistent in 5 cattle breeds. The PIC of this locus is the highest in Nangyang cattle, which belonged to moderate polymorphisms, and that of the other cattle breeds belonged to low polymorphisms. The χ2 adaptability test indicated that the polymorphic of site 257 was in accordance with Hardy-Weinberg equilibrium (P>0.05) in five breeds. Associate analysis showed that carcass length and loin muscle area is significantly different between AA and AB genotypes in this locus. This locus is probably a mutation that affects carcass length and loin muscle area, or tightly linked to it. It could be a candidate molecular marker for beef cattle breeding. |
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| Keywords: | PCR-SSCP |
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