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Identification of the yellow skin gene reveals a hybrid origin of the domestic chicken.

Eriksson, J. and Larson, G. and Gunnarsson, U. and Bed'hom, B. and Tixier-Boichard, M. and Strömstedt, L. and Wright, D. and Jungerius, A. and Vereijken, A. and Randi, E. and Jensen, P. and Andersson, L. (2008) 'Identification of the yellow skin gene reveals a hybrid origin of the domestic chicken.', PLoS genetics., 4 (2). e1000010.

Abstract

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.

Item Type:Article
Full text:PDF - Published Version
Available under License Creative Commons Attribution.
(295Kb)
Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1371/journal.pgen.1000010
Publisher statement:Copyright: © 2008 Eriksson et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Record Created:20 Mar 2012 13:20
Last Modified:26 Feb 2014 09:43

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