GEPHE SUMMARY Print
Entry Status
Published
GepheID
GP00000139
Main curator
Martin
PHENOTYPIC CHANGE
Trait Category
Trait State in Taxon A
Domestic chicken breeds and red jungle fowl with white skin and shanks
Trait State in Taxon B
Breeds with yellow skin and shanks
Ancestral State
Taxon A
Taxonomic Status
Taxon A
Latin Name
Common Name
chicken
Synonyms
Gallus gallus domesticus; chicken; bantam; chickens
Rank
species
Lineage
Show more ... pha; Tetrapoda; Amniota; Sauropsida; Sauria; Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda; Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae; Phasianinae; Gallus
NCBI Taxonomy ID
is Taxon A an Infraspecies?
No
Taxon B #1
Common Name
gray junglefowl
Synonyms
gray junglefowl
Rank
species
Lineage
Show more ... pha; Tetrapoda; Amniota; Sauropsida; Sauria; Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda; Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae; Phasianinae; Gallus
NCBI Taxonomy ID
is Taxon B an Infraspecies?
No
Taxon B #2
Latin Name
Common Name
chicken
Synonyms
Gallus gallus domesticus; chicken; bantam; chickens
Rank
species
Lineage
Show more ... pha; Tetrapoda; Amniota; Sauropsida; Sauria; Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda; Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae; Phasianinae; Gallus
NCBI Taxonomy ID
is Taxon B an Infraspecies?
Yes
Taxon B Description
domestic chicken breeds with yellow fat and shanks
GENOTYPIC CHANGE
Presumptive Null
Molecular Type
Aberration Type
Molecular Details of the Mutation
Not identified
Experimental Evidence
Authors
Eriksson J; Larson G; Gunnarsson U; Bed'hom B; Tixier-Boichard M; Strömstedt L; Wright D; Jungerius A; et al. ... show more
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.
RELATED GEPHE
Related Genes
Related Haplotypes
No matches found.
EXTERNAL LINKS
COMMENTS
@Introgression ; the mutation in BCO2 appeared first in the wild species Gallus sonneratii and then introgressed into a domesticated strain of chicken and gave the yellow skin phenotype.
YOUR FEEDBACK is welcome!