Genetic diversity and origin of Chinese cattle revealed by mtDNA D-loop sequence variation
Genetic diversity and origin of Chinese cattle revealed by mtDNA D-loop sequence variation
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DOI：
10.1016/j.ympev.2005.06.013
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发表时间：
2006-01-01
影响因子：
4.1
通讯作者：
Yao, YG
中科院分区：
文献类型：
--
作者：
Lai, SJ;Liu, YP;Yao, YG
为了确定中国牛的起源和遗传多样性，我们分析了来自中国西南和西部地区14个品种/群体的84头牛的完整线粒体DNA D环序列，以及GenBank中可用的牛序列。我们的结果表明，中国牛样本汇聚成两个主要类群，分别对应于牛（Bos taurus）和牛（Bos indicus）两个物种。尽管在R taurus和B. indicus mtDNA中都清楚地识别出显性谱系，但对这两个物种中每一个的谱系的网络分析进一步揭示了呈现区域差异的多个进化枝。中国的R taurus样本可分为T2、T3和T4进化枝，而R indicus则包含两个进化枝I1和I2。这些已识别分支的年龄估计显示时间范围为距今 14,100-44,500 年 (YBP)。中国牛的系统发育模式与最近描述的东北亚牛母系库一致，但表明 B. indicus 对中国南部和西南地区的牛贡献更大。中国牛的遗传多样性在所研究的品种之间存在差异。 (c) 2005 Elsevier Inc. 保留所有权利。
To determine the origin and genetic diversity of Chinese cattle, we analyzed the complete mtDNA D-loop sequences of 84 cattle from 14 breeds/populations from southwest and west China, together with the available cattle sequences in GenBank. Our results showed that the Chinese cattle samples converged into two main groups, which correspond to the two species Bos taurus and Bos indicus. Although a dominant lineage was clearly discerned in both R taurus and B. indicus mtDNAs, network analysis of the lineages in each of the two species further revealed multiple clades that presented regional difference. The R taurus samples in China could be grouped into clades T2, T3, and T4, whereas R indicus harbored two clades I1 and I2. Age estimation of these discerned clades showed a time range of 14,100-44,500 years before present (YBP). The phylogenetic pattern of Chinese cattle was consistent with the recently described cattle matrilineal pool from northeast Asia, but suggested that B. indicus contributed more to the cattle from south and southwest China. The genetic diversity of Chinese cattle varied among the breeds studied. (c) 2005 Elsevier Inc. All rights reserved.