中国科学家PNAS发表文章认为狗起源于中国南方
新华社 · 2016/04/26
狗的起源和驯化一直是个争议不断的科学问题。我国中科院的科学家于近日在国际知名期刊《美国科学院院刊》发表文章深入探讨了这一问题,认为狗起源于中国南方。


狗的起源和驯化一直是个争议不断的科学问题。我国中科院的科学家于近日在国际知名期刊《美国科学院院刊》发表文章深入探讨了这一问题,认为狗起源于中国南方。

据论文第一作者、中科院昆明动物研究所副研究员王国栋介绍,目前,学界对于狗起源的说法主要有东亚起源说、中亚起源说、欧洲起源说和中东起源说。

王国栋说:“我们通过整合已经发表的中国南方家犬群体的数据,并结合我们自己的研究成果表明,家犬是在33000年前左右开始逐渐被人类驯化,中国南方的家犬群体拥有最小的连锁不平衡距离,这一指标支持狗起源于中国南方。”

王国栋表示,下一步,还将对野外科考结果和1000多份样本做详尽分析,以确定狗起源的确切地区,届时将揭开狗的“身世之谜”。

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  • Genetic structure in village dogs reveals a Central Asian domestication origin

    Dogs were the first domesticated species, originating at least 15,000 y ago from Eurasian gray wolves. Dogs today consist primarily of two specialized groups—a diverse set of nearly 400 pure breeds and a far more populous group of free-ranging animals adapted to a human commensal lifestyle (village dogs). Village dogs are more genetically diverse and geographically widespread than purebred dogs making them vital for unraveling dog population history. Using a semicustom 185,805-marker genotyping array, we conducted a large-scale survey of autosomal, mitochondrial, and Y chromosome diversity in 4,676 purebred dogs from 161 breeds and 549 village dogs from 38 countries. Geographic structure shows both isolation and gene flow have shaped genetic diversity in village dog populations. Some populations (notably those in the Neotropics and the South Pacific) are almost completely derived from European stock, whereas others are clearly admixed between indigenous and European dogs. Importantly, many populations—including those of Vietnam, India, and Egypt—show minimal evidence of European admixture. These populations exhibit a clear gradient of short-range linkage disequilibrium consistent with a Central Asian domestication origin

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