Origin of mitochondrial DNA diversity of domestic yaks.
Origin of mitochondrial DNA diversity of domestic yaks.
复制标题
线粒体DNA多样性的起源。
DOI：
10.1186/1471-2148-6-73
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发表时间：
2006-09-22
影响因子：
3.4
通讯作者：
Liu, Jianquan
中科院分区：
文献类型：
--
作者：
Guo, Songchang;Savolainen, Peter;Su, Jianping;Zhang, Qian;Qi, Delin;Zhou, Jie;Zhong, Yang;Zhao, Xinquan;Liu, Jianquan
植物和动物的驯化在人类学上是极其重要的。先前的研究揭示了牲畜物种种群的普遍趋势，包括非常不同的母系，表明它们是在多个独立的事件中从遗传离散的野生种群驯化的。然而，在水布法罗，有建议说，类似的深母系分歧可能起源于一个单一的人口。由于缺乏足够的野生样本，这些假设很少得到严格的检验。为探讨家牦牛（Poephagus grunnies）的起源，对青海西部地区13头野生牦牛（包括8头小种群野生牦牛）和250头家牦牛的637 bp母系遗传mtDNA进行了分析。国内牦牛种群存在两个分歧较大的系统发育群，分歧时间大于10万年BP。我们在这里表明，单倍型聚类与两个非常不同的母系驯化牦牛发生在一个单一的，小的，野生人口。这一发现表明，所有家养牦牛都来自同一个野生基因库。然而，没有明确的相关性的mtDNA系统发育分支和10个形态类型的样本牦牛，后者最近多样化。在目前野生分布的青海和西藏发现了相对较高的多样性，与以前的建议，最早的驯化发生在这一地区。传统的分子钟估计导致不切实际的驯化开始的早期日期。然而，贝叶斯估计的聚结时间允许放松的突变率更好地与驯化在全新世的考古记录的支持。这里收集的信息和以前对其他动物的研究表明，尽管母系谱系存在很大差异，但家畜物种驯化的人口统计学历史是高度多样的。这些结果进一步表明，驯化当地野生猎物有蹄类动物是一个常见的事件，在人类文明的发展，在世界不同地点，包括高，干旱的青藏高原冰后殖民。
The domestication of plants and animals was extremely important anthropologically. Previous studies have revealed a general tendency for populations of livestock species to include deeply divergent maternal lineages, indicating that they were domesticated in multiple, independent events from genetically discrete wild populations. However, in water buffalo, there are suggestions that a similar deep maternal bifurcation may have originated from a single population. These hypotheses have rarely been rigorously tested because of a lack of sufficient wild samples. To investigate the origin of the domestic yak (Poephagus grunnies), we analyzed 637 bp of maternal inherited mtDNA from 13 wild yaks (including eight wild yaks from a small population in west Qinghai) and 250 domesticated yaks from major herding regions. The domestic yak populations had two deeply divergent phylogenetic groups with a divergence time of > 100,000 yrs BP. We here show that haplotypes clustering with two deeply divergent maternal lineages in domesticated yaks occur in a single, small, wild population. This finding suggests that all domestic yaks are derived from a single wild gene pool. However, there is no clear correlation of the mtDNA phylogenetic clades and the 10 morphological types of sampled yaks indicating that the latter diversified recently. Relatively high diversity was found in Qinghai and Tibet around the current wild distribution, in accordance with previous suggestions that the earliest domestications occurred in this region. Conventional molecular clock estimation led to an unrealistic early dating of the start of the domestication. However, Bayesian estimation of the coalescence time allowing a relaxation of the mutation rate are better in agreement with a domestication during the Holocene as supported by archeological records. The information gathered here and the previous studies of other animals show that the demographic histories of domestication of livestock species were highly diverse despite the common general feature of deeply divergent maternal lineages. The results further suggest that domestication of local wild prey ungulate animals was a common occurrence during the development of human civilization following the postglacial colonization in different locations of the world, including the high, arid Qinghai-Tibetan Plateau.
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影响因子：
64.8
作者：
Harter, AV;Gardner, KA;Rieseberg, LH
通讯作者：
Rieseberg, LH
影响因子：
4.1
作者：
Kierstein, G;Vallinoto, M;Brenig, B
通讯作者：
Brenig, B
影响因子：
4.1
作者：
Hassanin, A;Ropiquet, A
通讯作者：
Ropiquet, A
DOI：
10.1073/pnas.152330099
发表时间：
2002-08-06
影响因子：
11.1
作者：
Jansen, T;Forster, P;Olek, K
通讯作者：
Olek, K
影响因子：
4.1
作者：
Lai, SJ;Liu, YP;Yao, YG
通讯作者：
Yao, YG