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CALCA基因遗传变异及其与肉质性状关联分析

DOI: 10.7668/hbnxb.2014.05.019, PP. 114-118

Keywords: 肉牛,CALCA基因,SNP,群体遗传分析,肉质性状

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Abstract:

旨在分析早胜牛及其杂交牛CALCA基因第4外显子的多态性及其与肉质性状的相关性,发现与肉质性状相关的分子标记,为加快肉牛选育进程提供参考。利用PCR-SSCP技术对早胜牛、南杂牛、秦杂牛和西杂牛共362个个体的CALCA基因第4外显子进行了遗传变异检测,并运用SPSS17.0软件对早胜牛(平凉类群)遗传变异与经济性状关联性进行了分析。结果表明,CALCA基因第4外显子存在2个突变位点T3237A和G3289A,并检测到AA和AB2种基因型。相关性分析表明,CALCA基因突变位点与剪切力、眼肌面积、热胴体重和熟肉率显著相关(P<0.05),AA基因型个体剪切力、热胴体重和熟肉率显著高于AB基因型个体(P<0.05),而AB基因型个体眼肌面积显著高于AA基因型个体(P<0.05),其他性状在各基因型间差异不显著。因此,初步推测CALCA基因的突变位点可以作为评定早胜牛肉质性状的遗传标记。

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