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西藏马线粒体DNA D-loop区的遗传多样性

Journal of Jilin University(Science Edition)(2007)

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Abstract
对西藏拉萨和泽当两个地区23匹西藏马的线粒体DNA控制区(m tDNA D-loop)部分片段进行序列分析,检测出16个单倍型,包括32个核苷酸多态性位点(其中转换位点31个,缺失位点1个),占所分析位点总数的9.27%.单倍型多样性(h)和核苷酸多样性(π)分别为0.93±0.04和2.51%±0.16%,表明西藏马的遗传多样性较丰富.基于23匹西藏马序列以及现代欧亚马群的m tDNA序列,进行了系统发育分析和多维尺度分析.结果表明,西藏马在母系遗传关系上与近东、中亚以及欧洲家马有较近的亲缘关系,与东亚的蒙古马以及韩国马亲缘关系较远.
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Key words
D-loop,Tibetan horses,phylogenetic analysis,genetic diversity,mitochondrial DNA
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