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Identification of the Yellow Skin Gene Reveals a Hybrid Origin of the Domestic Chicken
Uppsala University.
Uppsala University.
Uppsala University.
INRA AgroParisTech, France.
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2008 (English)In: PLoS Genetics, ISSN 1553-7404, Vol. 4, no 2Article in journal (Refereed) Published
Abstract [en]

Yellow skin is an abundant phenotype among domestic chickens and is caused by a recessive allele (W*Y) that allows deposition of yellow carotenoids in the skin. Here we show that yellow skin is caused by one or more cis-acting and tissue-specific regulatory mutation(s) that inhibit expression of BCDO2 (beta-carotene dioxygenase 2) in skin. Our data imply that carotenoids are taken up from the circulation in both genotypes but are degraded by BCDO2 in skin from animals carrying the white skin allele (W*W). Surprisingly, our results demonstrate that yellow skin does not originate from the red junglefowl (Gallus gallus), the presumed sole wild ancestor of the domestic chicken, but most likely from the closely related grey junglefowl (Gallus sonneratii). This is the first conclusive evidence for a hybrid origin of the domestic chicken, and it has important implications for our views of the domestication process.

Place, publisher, year, edition, pages
2008. Vol. 4, no 2
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Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-41899DOI: 10.1371/journal.pgen.1000010PubMedID: 18454198Local ID: 59333OAI: oai:DiVA.org:liu-41899DiVA: diva2:262754
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2014-08-25

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Jensen, Per

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