Sexual selection promotes reproductive isolation in barn swallows.

Autor:	Schield DR; Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA.; Department of Biology, University of Virginia, Charlottesville, VA, USA., Carter JK; Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA., Scordato ESC; Department of Biological Sciences, California State Polytechnic University, Pomona, CA, USA., Levin II; Department of Biology, Kenyon College, Gambier, OH, USA., Wilkins MR; Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA.; Galactic Polymath Education Studio, Minneapolis, MN, USA., Mueller SA; Division of Evolutionary Biology, Faculty of Biology, Ludwig Maximilian University of Munich, Munich, Germany., Gompert Z; Department of Biology, Utah State University, Logan, UT, USA., Nosil P; CEFE, Université Montpellier, CNRS, EPHE, IRD, Montpellier, France., Wolf JBW; Division of Evolutionary Biology, Faculty of Biology, Ludwig Maximilian University of Munich, Munich, Germany., Safran RJ; Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA.
Jazyk:	angličtina
Zdroj:	Science (New York, N.Y.) [Science] 2024 Dec 13; Vol. 386 (6727), pp. eadj8766. Date of Electronic Publication: 2024 Dec 13.
DOI:	10.1126/science.adj8766
Abstrakt:	Despite the well-known effects of sexual selection on phenotypes, links between this evolutionary process and reproductive isolation, genomic divergence, and speciation have been difficult to establish. We unravel the genetic basis of sexually selected plumage traits to investigate their effects on reproductive isolation in barn swallows. The genetic architecture of sexual traits is characterized by 12 loci on two autosomes and the Z chromosome. Sexual trait loci exhibit signatures of divergent selection in geographic isolation and barriers to gene flow in secondary contact. Linkage disequilibrium between these genes has been maintained by selection in hybrid zones beyond what would be expected under admixture alone. Our findings reveal that selection on coupled sexual trait loci promotes reproductive isolation, providing key empirical evidence for the role of sexual selection in speciation.
Databáze:	MEDLINE
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