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Genomic signatures of domestication in Old World camels

Fitak Robert Rodgers, Mohandesan Elmira, Corander Jukka, Yadamsuren Adiya, Chuluunbat Battsetseg, Abdelhadi Omer M.A., Raziq Abdul, Nagy Peter, Walzer Chris, Faye Bernard, Burger Pamela A.. 2020. Genomic signatures of domestication in Old World camels. Communications Biology, 3 (1):316, 10 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Abstract : Domestication begins with the selection of animals showing less fear of humans. In most domesticates, selection signals for tameness have been superimposed by intensive breeding for economical or other desirable traits. Old World camels, conversely, have maintained high genetic variation and lack secondary bottlenecks associated with breed development. By re-sequencing multiple genomes from dromedaries, Bactrian camels, and their endangered wild relatives, here we show that positive selection for candidate genes underlying traits collectively referred to as 'domestication syndrome' is consistent with neural crest deficiencies and altered thyroid hormone-based signaling. Comparing our results with other domestic species, we postulate that the core set of domestication genes is considerably smaller than the pan-domestication set – and overlapping genes are likely a result of chance and redundancy. These results, along with the extensive genomic resources provided, are an important contribution to understanding the evolutionary history of camels and the genomic features of their domestication.

Mots-clés Agrovoc : génomique, Camelidae, Domestication des animaux, Chameau, Chameau d'asie, Dromadaire, Héritabilité génotypique

Mots-clés libres : Comparative genomics, Conservation genomics, Genome evolution

Classification Agris : L10 - Animal genetics and breeding

Champ stratégique Cirad : CTS 1 (2019-) - Biodiversité

Auteurs et affiliations

  • Fitak Robert Rodgers, University of Central Florida (USA) - auteur correspondant
  • Mohandesan Elmira, University of Vienna (AUT)
  • Corander Jukka, University of Helsinki (FIN)
  • Yadamsuren Adiya, Chinese Academy of Sciences (CHN)
  • Chuluunbat Battsetseg, Mongolian Academy of Sciences (MNG)
  • Abdelhadi Omer M.A., University of Khartoum (SDN)
  • Raziq Abdul, Alain Farms for Livestock Production (ARE)
  • Nagy Peter, Emirates Industries for Camel Milk and Products (ARE)
  • Walzer Chris, Wildlife Conservation Society (USA)
  • Faye Bernard, CIRAD-ES-UMR SELMET (FRA)
  • Burger Pamela A., Research Institute of Wildlife Ecology (AUT) - auteur correspondant

Source : Cirad-Agritrop (https://agritrop.cirad.fr/596108/)

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