Sex-linked barring in chickens is controlled by the CDKN2A/B tumour suppressor locus
2010 (English)In: Pigment Cell and Melanoma Research, ISSN 1755-1471, Vol. 23, no 4, 521-530 p.Article in journal (Refereed) Published
Sex-linked barring, a common plumage colour found in chickens, is characterized by black and white barred feathers. Previous studies have indicated that the white bands are caused by an absence of melanocytes in the feather follicle during the growth of this region. Here we show that Sex-linked barring is controlled by the CDKN2A/B locus, which encodes the INK4b and ARF transcripts. We identified two non-coding mutations in CDKN2A that showed near complete association with the phenotype. Also identified were two missense mutations at highly conserved sites, V9D and R10C, and every bird tested with a confirmed Sex-linked barring phenotype carried one of these missense mutations. Further work is required to determine if one of these or a combined effect of two or more CDKN2A mutations is causing Sex-linked barring. This novel finding provides the first evidence that the tumour suppressor locus CDKN2A/B can affect pigmentation phenotypes and sheds new light on the functional significance of this gene.
Place, publisher, year, edition, pages
2010. Vol. 23, no 4, 521-530 p.
INK4b, ARF, CDKN2, sex-linked barring, chicken, melanogenesis, melanocytes
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-124942DOI: 10.1111/j.1755-148X.2010.00700.xISI: 000280711100009PubMedID: 20374521OAI: oai:DiVA.org:uu-124942DiVA: diva2:318192