蓝海人类学在线 Ryan WEI's Forum of Anthropology

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发表于 2011-11-24 09:52 | 显示全部楼层 |阅读模式
本帖最后由 198401 于 2011-11-24 09:56 编辑

Origins of domestic dog in Southern East Asia is supported by analysis of Y-chromosome DNA

Z-L Ding et al.

Global mitochondrial DNA (mtDNA) data indicates that the dog originates from domestication of wolf in Asia South of Yangtze River (ASY), with minor genetic contributions from dog–wolf hybridisation elsewhere. Archaeological data and autosomal single nucleotide polymorphism data have instead suggested that dogs originate from Europe and/or South West Asia but, because these datasets lack data from ASY, evidence pointing to ASY may have been overlooked. Analyses of additional markers for global datasets, including ASY, are therefore necessary to test if mtDNA phylogeography reflects the actual dog history and not merely stochastic events or selection. Here, we analyse 14 437 bp of Y-chromosome DNA sequence in 151 dogs sampled worldwide. We found 28 haplotypes distributed in five haplogroups. Two haplogroups were universally shared and included three haplotypes carried by 46% of all dogs, but two other haplogroups were primarily restricted to East Asia. Highest genetic diversity and virtually complete phylogenetic coverage was found within ASY. The 151 dogs were estimated to originate from 13–24 wolf founders, but there was no indication of post-domestication dog–wolf hybridisations. Thus, Y-chromosome and mtDNA data give strikingly similar pictures of dog phylogeography, most importantly that roughly 50% of the gene pools are shared universally but only ASY has nearly the full range of genetic diversity, such that the gene pools in all other regions may derive from ASY. This corroborates that ASY was the principal, and possibly sole region of wolf domestication, that a large number of wolves were domesticated, and that subsequent dog–wolf hybridisation contributed modestly to the dog gene pool.

 楼主| 发表于 2011-11-24 10:02 | 显示全部楼层
与以前的一篇《狗起源于中东灰狼》不同。 ... 0%B6%AB%BB%D2%C0%C7
发表于 2011-11-24 13:23 | 显示全部楼层
发表于 2011-11-24 14:57 | 显示全部楼层
发表于 2011-11-24 15:34 | 显示全部楼层
198401 发表于 2011-11-24 10:02

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