Origin of mitochondrial DNA diversity of domestic yaks

NWIPB OpenIR

	Origin of mitochondrial DNA diversity of domestic yaks
	Guo, Songchang ; Savolainen, Peter ; Su, Jianping ; Zhang, Qian ; Qi, Delin ; Zhou, Jie ; Zhong, Yang ; Zhao, Xinquan ; Liu, Jianquan
	2006-09-22
发表期刊	BMC EVOLUTIONARY BIOLOGY
卷号	6 期号:september 页码:73
文章类型	Article
摘要	Background: 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.Results: 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 rateConclusion: 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.; Background: 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.
关键词	Multiple Maternal Origins Qinghai-tibetan Plateau Buffalo Bubalus-bubalis Sequence Variation Genetic Diversity D-loop Phylogeography Speculation Phylogenies Networks
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
学科领域	遗传学
关键词[WOS]	MULTIPLE MATERNAL ORIGINS ; QINGHAI-TIBETAN PLATEAU ; BUFFALO BUBALUS-BUBALIS ; SEQUENCE VARIATION ; GENETIC DIVERSITY ; D-LOOP ; PHYLOGEOGRAPHY ; SPECULATION ; PHYLOGENIES ; NETWORKS
收录类别	SCI
语种	英语
WOS研究方向	Evolutionary Biology ; Genetics & Heredity
WOS类目	Evolutionary Biology ; Genetics & Heredity
WOS记录号	WOS:000241679100001
引用统计	被引频次：83[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1312
专题	中国科学院西北高原生物研究所
作者单位	1.NW Plateau Inst Biol, Key Lab Qinghai Tibetan Ecol Adaptat, Xining 810001, Qinghai, Peoples R China 2.Royal Inst Technol, KTH, Dept Biotechnol, S-10691 Stockholm, Sweden 3.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 4.Lanzhou Univ, Coll Life Sci, Key Lab Arid & Grassland Ecol, Lanzhou 730000, Peoples R China 5.Fudan Univ, Sch Life Sci, Key Lab Biodivers Sci & Ecol Engn, Shanghai 200433, Peoples R China
推荐引用方式 GB/T 7714	Guo, Songchang,Savolainen, Peter,Su, Jianping,et al. Origin of mitochondrial DNA diversity of domestic yaks[J]. BMC EVOLUTIONARY BIOLOGY,2006,6(september):73.
APA	Guo, Songchang.,Savolainen, Peter.,Su, Jianping.,Zhang, Qian.,Qi, Delin.,...&Liu, Jianquan.(2006).Origin of mitochondrial DNA diversity of domestic yaks.BMC EVOLUTIONARY BIOLOGY,6(september),73.
MLA	Guo, Songchang,et al."Origin of mitochondrial DNA diversity of domestic yaks".BMC EVOLUTIONARY BIOLOGY 6.september(2006):73.

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