Transitions between phases of genomic differentiation during stick-insect speciation

Riesch, Rüdiger; Muschick, Moritz; Lindtke, Dorothea; Villoutreix, Romain; Comeault, Aaron A.; Farkas, Timothy E.; Lucek, Kay; Hellen, Elizabeth; Soria-Carrasco, Víctor; Dennis, Stuart R.; de Carvalho, Clarissa F.; Safran, Rebecca J.; Sandoval, Cristina P.; Feder, Jeff; Gries, Regine; Crespi, Bernard J.; Gries, Gerhard; Gompert, Zach; Nosil, Patrik (2017). Transitions between phases of genomic differentiation during stick-insect speciation. Nature ecology & evolution, 1(4), 0082. Nature Publishing Group 10.1038/s41559-017-0082

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Speciation can involve a transition from a few genetic loci that are resistant to gene flow to genome-wide differentiation. However, only limited data exist concerning this transition and the factors promoting it. Here, we study phases of speciation using data from >100 populations of 11 species of Timema stick insects. Consistent with early phases of genic speciation, adaptive colour-pattern loci reside in localized genetic regions of accentuated differentiation between populations experiencing gene flow. Transitions to genome-wide differentiation are also observed with gene flow, in association with differentiation in polygenic chemical traits affecting mate choice. Thus, intermediate phases of speciation are associated with genome-wide differentiation and mate choice, but not growth of a few genomic islands. We also find a gap in genomic differentiation between sympatric taxa that still exchange genes and those that do not, highlighting the association between differentiation and complete reproductive isolation. Our results suggest that substantial progress towards speciation may involve the alignment of multi-faceted aspects of differentiation.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)
08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE) > Aquatic Ecology

UniBE Contributor:

Muschick, Moritz

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 590 Animals (Zoology)

ISSN:

2397-334X

Publisher:

Nature Publishing Group

Funders:

[18] European Research Council
[4] Swiss National Science Foundation
[UNSPECIFIED] HFSP
[UNSPECIFIED] Royal Society
[UNSPECIFIED] NERC
[UNSPECIFIED] Wellcome Trust
[UNSPECIFIED] MRC hub

Projects:

Projects 0 not found.
Projects 0 not found.

Language:

English

Submitter:

Moritz Muschick

Date Deposited:

20 Apr 2018 14:02

Last Modified:

24 Oct 2019 09:36

Publisher DOI:

10.1038/s41559-017-0082

BORIS DOI:

10.7892/boris.113775

URI:

https://boris.unibe.ch/id/eprint/113775

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