Towards the completion of speciation : the evolution of reproductive isolation beyond the first barriers

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Kulmuni , J , Butlin , R K , Lucek , K , Savolainen , V & Westram , A M 2020 , ' Towards the completion of speciation : the evolution of reproductive isolation beyond the first barriers ' , Philosophical Transactions of the Royal Society. Biological Sciences , vol. 375 , no. 1806 , 20190528 . https://doi.org/10.1098/rstb.2019.0528

Title: Towards the completion of speciation : the evolution of reproductive isolation beyond the first barriers
Author: Kulmuni, Jonna; Butlin, Roger K.; Lucek, Kay; Savolainen, Vincent; Westram, Anja Marie
Contributor: University of Helsinki, Organismal and Evolutionary Biology Research Programme
Date: 2020-08-31
Language: eng
Number of pages: 9
Belongs to series: Philosophical Transactions of the Royal Society. Biological Sciences
ISSN: 0962-8436
URI: http://hdl.handle.net/10138/336681
Abstract: y Speciation, that is, the evolution of reproductive barriers eventually leading to complete isolation, is a crucial process generating biodiversity. Recent work has contributed much to our understanding of how reproductive barriers begin to evolve, and how they are maintained in the face of gene flow. However, little is known about the transition from partial to strong reproductive isolation (RI) and the completion of speciation. We argue that the evolution of strong RI is likely to involve different processes, or new interactions among processes, compared with the evolution of the first reproductive barriers. Transition to strong RI may be brought about by changing external conditions, for example, following secondary contact. However, the increasing levels of RI themselves create opportunities for new barriers to evolve and, and interaction or coupling among barriers. These changing processes may depend on genomic architecture and leave detectable signals in the genome. We outline outstanding questions and suggest more theoretical and empirical work, considering both patterns and processes associated with strong RI, is needed to understand how speciation is completed. This article is part of the theme issue 'Towards the completion of speciation: the evolution of reproductive isolation beyond the first barriers'.
Subject: speciation
speciation continuum
strong reproductive isolation
barriers to gene flow
feedback between barriers
GENE FLOW
REINFORCEMENT
DIVERGENCE
CONTINUUM
ESTABLISHMENT
HITCHHIKING
MECHANISMS
DYNAMICS
1181 Ecology, evolutionary biology
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