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Sex chromosome-linked species recognition and evolution of reproductive isolation in flycatchers
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Evolutionary Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Evolutionary Biology.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Evolution, Animal Ecology.
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2007 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 318, no 5847, 95-97 p.Article in journal (Refereed) Published
Abstract [en]

Interbreeding between species (hybridization) typically produces unfit offspring. Reduced hybridization should therefore be favored by natural selection. However, this is difficult to accomplish because hybridization also sets the stage for genetic recombination to dissociate species-specific traits from the preferences for them. Here we show that this association is maintained by physical linkage (on the same chromosome) in two hybridizing Ficedula flycatchers. By analyzing the mating patterns of female hybrids and cross-fostered offspring, we demonstrate that species recognition is inherited on the Z chromosome, which is also the known location of species-specific male plumage traits and genes causing low hybrid fitness. Limited recombination on the Z chromosome maintains associations of Z-linked genes despite hybridization, suggesting that the sex chromosomes may be a hotspot for adaptive speciation.

Place, publisher, year, edition, pages
2007. Vol. 318, no 5847, 95-97 p.
Keyword [en]
Vertebrata, Aves, Sexual behavior, Ficedula albicollis, Ficedula hypoleuca, Adaptive response, Interspecific hybridization, Mating, Mate selection, Species specificity, Reproduction, Natural selection, Speciation, Reproductive isolation, Intraspecific recognition, Sex chromosome
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Biological Sciences
Identifiers
URN: urn:nbn:se:uu:diva-13330DOI: 10.1126/science.1141506ISI: 000249915400048PubMedID: 17916732OAI: oai:DiVA.org:uu-13330DiVA: diva2:41100
Available from: 2008-01-22 Created: 2008-01-22 Last updated: 2017-12-11Bibliographically approved

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Svedin, NinaGustafsson, LarsQvarnström, Anna

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