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The genomic landscape underlying phenotypic integrity in the face of gene flow in crows
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2014 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 344, no 6190, 1410-1414 p.Article in journal (Refereed) Published
Abstract [en]

The importance, extent, and mode of interspecific gene flow for the evolution of species has long been debated. Characterization of genomic differentiation in a classic example of hybridization between all-black carrion crows and gray-coated hooded crows identified genome-wide introgression extending far beyond the morphological hybrid zone. Gene expression divergence was concentrated in pigmentation genes expressed in gray versus black feather follicles. Only a small number of narrow genomic islands exhibited resistance to gene flow. One prominent genomic region (<2 megabases) harbored 81 of all 82 fixed differences (of 8.4 million single-nucleotide polymorphisms in total) linking genes involved in pigmentation and in visual perception-a genomic signal reflecting color-mediated prezygotic isolation. Thus, localized genomic selection can cause marked heterogeneity in introgression landscapes while maintaining phenotypic divergence.

Place, publisher, year, edition, pages
2014. Vol. 344, no 6190, 1410-1414 p.
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Chemical Sciences
URN: urn:nbn:se:su:diva-106065DOI: 10.1126/science.1253226ISI: 000337531700043OAI: diva2:735754


Available from: 2014-07-31 Created: 2014-07-21 Last updated: 2014-07-31Bibliographically approved

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Unneberg, Per
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Department of Biochemistry and BiophysicsScience for Life Laboratory (SciLifeLab)
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