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Molecular and Evolutionary History of Melanism in North American Gray Wolves
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2009 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 323, no 5919, 1339-1343 p.Article in journal (Refereed) Published
Abstract [en]

Morphological diversity within closely related species is an essential aspect of evolution and adaptation. Mutations in the Melanocortin 1 receptor (Mc1r) gene contribute to pigmentary diversity in natural populations of fish, birds, and many mammals. However, melanism in the gray wolf, Canis lupus, is caused by a different melanocortin pathway component, the K locus, that encodes a beta-defensin protein that acts as an alternative ligand for Mc1r. We show that the melanistic K locus mutation in North American wolves derives from past hybridization with domestic dogs, has risen to high frequency in forested habitats, and exhibits a molecular signature of positive selection. The same mutation also causes melanism in the coyote, Canis latrans, and in Italian gray wolves, and hence our results demonstrate how traits selected in domesticated species can influence the morphological diversity of their wild relatives.

Place, publisher, year, edition, pages
2009. Vol. 323, no 5919, 1339-1343 p.
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Biological Sciences
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URN: urn:nbn:se:uu:diva-129895DOI: 10.1126/science.1165448ISI: 000263876700041OAI: oai:DiVA.org:uu-129895DiVA: diva2:345574
Available from: 2010-08-26 Created: 2010-08-25 Last updated: 2017-12-12Bibliographically approved

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