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  • Morell Miranda, PedroUppsala universitet,Människans evolution,Günther Lab (author)

Demographic reconstruction of the Western sheep expansion from whole-genome sequences

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • Oxford University Press,2023
  • electronicrdacarrier

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  • LIBRIS-ID:oai:DiVA.org:uu-514446
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-514446URI
  • https://doi.org/10.1093/g3journal/jkad199DOI

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  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • As one of the earliest livestock, sheep (Ovis aries) were domesticated in the Fertile Crescent about 12,000–10,000 years ago and have a nearly worldwide distribution today. Most of our knowledge about the timing of their expansions stems from archaeological data but it is unclear how the genetic diversity of modern sheep fits with these dates. We used whole-genome sequencing data of 63 domestic breeds and their wild relatives, the Asiatic mouflon (O. gmelini, previously known as O. orientalis), to explore the demographic history of sheep. On the global scale, our analysis revealed geographic structuring among breeds with unidirectional recent gene flow from domestics into Asiatic mouflons. We then selected 4 representative breeds from Spain, Morocco, the United Kingdom, and Iran to build a comprehensive demographic model of the Western sheep expansion. We inferred a single domestication event around 11,000 years ago. The subsequent westward expansion is dated to approximately 7,000 years ago, later than the original Neolithic expansion of sheep and slightly predating the Secondary Product Revolution associated with wooly sheep. We see some signals of recent gene flow from an ancestral population into Southern European breeds which could reflect admixture with feral European mouflon. Furthermore, our results indicate that many breeds experienced a reduction of their effective population size during the last centuries, probably associated with modern breed development. Our study provides insights into the complex demographic history of Western Eurasian sheep, highlighting interactions between breeds and their wild counterparts.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Soares, André E. R.Uppsala universitet,Människans evolution,Science for Life Laboratory, SciLifeLab,Institutionen för medicinsk biokemi och mikrobiologi,National Bioinformatics Infrastructure Sweden (NBIS)(Swepub:uu)andso616 (author)
  • Günther, TorstenUppsala universitet,Människans evolution(Swepub:uu)torgu835 (author)
  • Uppsala universitetMänniskans evolution (creator_code:org_t)

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  • In:G3: Oxford University Press13:112160-1836

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HUMANITIES
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