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dc.contributor.authorLawal, Raman Akinyanju
dc.contributor.authorMartin, Simon H.
dc.contributor.authorVanmechelen, Koen
dc.contributor.authorVereijken, Addie
dc.contributor.authorSilva, Pradeepa
dc.contributor.authorAl-Atiyat, Raed Mahmoud
dc.contributor.authorAljumaah, Riyadh Salah
dc.contributor.authorMwacharo, Joram M.
dc.contributor.authorWu, Dong-Dong
dc.contributor.authorZhang, Ya-Ping
dc.contributor.authorHocking, Paul M.
dc.contributor.authorSmith, Jacqueline
dc.contributor.authorWragg, David
dc.contributor.authorHanotte, Olivier
dc.description.abstractAbstract: Background: Hybridisation and introgression play key roles in the evolutionary history of animal species. They are commonly observed within several orders in wild birds. The domestic chicken Gallus gallus domesticus is the most common livestock species. More than 65 billion chickens are raised annually to produce meat and 80 million metric tons of egg for global human consumption by the commercial sector. Unravelling the origin of its genetic diversity has major application for sustainable breeding improvement programmes. Results: In this study, we report genome-wide analyses for signatures of introgression between indigenous domestic village chicken and the four wild Gallus species. We first assess the genome-wide phylogeny and divergence time across the genus Gallus. Genome-wide sequence divergence analysis supports a sister relationship between the Grey junglefowl G. sonneratii and Ceylon junglefowl G. lafayettii. Both species form a clade that is sister to the Red junglefowl G. gallus, with the Green junglefowl G. varius the most ancient lineage within the genus. We reveal extensive bidirectional introgression between the Grey junglefowl and the domestic chicken and to a much lesser extent with the Ceylon junglefowl. We identify a single case of Green junglefowl introgression. These introgressed regions include genes with biological functions related to development and immune system. Conclusions: Our study shows that while the Red junglefowl is the main ancestral species, introgressive hybridisation episodes have impacted the genome and contributed to the diversity of the domestic chicken, although likely at different levels across its geographic range.
dc.publisherBioMed Central
dc.rightsAttribution 4.0 International (CC BY 4.0)en
dc.subjectResearch Article
dc.subjectChicken introgression
dc.subjectGenetic diversity
dc.subjectChicken domestication
dc.subjectLivestock species
dc.subjectDivergence time
dc.subjectGallus species
dc.subjectInterspecies hybridisation
dc.titleThe wild species genome ancestry of domestic chickens
prism.publicationNameBMC Biology
dc.contributor.orcidLawal, Raman Akinyanju [0000-0001-8908-7664]
pubs.funder-project-idUniversity of Nottingham Vice Chancellor's Scholarship (International) award. (13863)
pubs.funder-project-idBiotechnology and Biological Sciences Research Council (BBSRC), the UK (BB/H009396/1)
pubs.funder-project-idDepartment for International Development (GB) (BB/H009159/1)
pubs.funder-project-idScottish Government (BB/H009051/1)
pubs.funder-project-idBill and Melinda Gates Foundation (OPP1127286, OPP1127286)
pubs.funder-project-idNational Plan for Science, Technology and Innovation (12-AGR2555-02, 12-AGR2555-02, 12-AGR2555-02)

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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's licence is described as Attribution 4.0 International (CC BY 4.0)