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Divergent selection and heterogeneous genomic divergence
TLDR
It is concluded that divergent selection makes diverse contributions to heterogeneous genomic divergence, and the number, size, and distribution of genomic regions affected by selection varied substantially among studies, leading us to discuss the potential role of Divergent selection in the growth of regions of differentiation (i.e. genomic islands of divergence), a topic in need of future investigation. Expand
Ecological explanations for (incomplete) speciation.
TLDR
Recent evidence is reviewed indicating that variability in the completeness of speciation can also be associated with the nature of divergent selection itself, with speciation being greatly promoted by (i) stronger selection on a given, single trait (the 'stronger selection' hypothesis) and (ii) Selection on a greater number of traits ( the 'multifarious selection' hypotheses). Expand
The genomics of speciation-with-gene-flow.
TLDR
A theory predicting four phases of speciation, defined by changes in the relative effectiveness of divergence and genome hitchhiking, is described and future directions are outlined, emphasizing the need to couple next-generation sequencing with selection, transplant, functional genomics, and mapping studies. Expand
PERSPECTIVE: REPRODUCTIVE ISOLATION CAUSED BY NATURAL SELECTION AGAINST IMMIGRANTS FROM DIVERGENT HABITATS
Abstract The classification of reproductive isolating barriers laid out by Dobzhansky and Mayr has motivated and structured decades of research on speciation. We argue, however, that thisExpand
Heterogeneous Genomic Differentiation Between Walking-Stick Ecotypes: “Isolation by Adaptation” and Multiple Roles for Divergent Selection
TLDR
The results suggest that selection may affect differentiation directly, via linkage, or by facilitating genetic drift, thereby illustrating the varied and sometimes nonintuitive contributions of selection to heterogeneous genomic differentiation. Expand
Magic traits in speciation: 'magic' but not rare?
TLDR
It is illustrated that magic traits can be produced by a variety of mechanisms, including ones in which reproductive isolation arises as an automatic by-product of adaptive divergence. Expand
Widespread genomic divergence during sympatric speciation
TLDR
Results highlight how the individual genes driving speciation can be embedded within an actively diverging genome, and illustrate how these continents can exhibit variable topography, depending on selection strength, availability of preexisting genetic variation, linkage relationships, and genomic features that reduce recombination. Expand
Establishment of new mutations under divergence and genome hitchhiking
TLDR
It is found that the strength of selection acting directly on a new mutation is generally the most important predictor for establishment, with divergence and genomic hitchhiking having smaller effects. Expand
REPRODUCTIVE ISOLATION CAUSED BY NATURAL SELECTION AGAINST IMMIGRANTS FROM DIVERGENT HABITATS
TLDR
The contributions of immigrant inviability to total reproductive isolation are quantified by examining study systems where multiple components of reproductive isolation have been measured and it is demonstrated that these contributions are frequently greater than those of traditionally recognized reproductive barriers. Expand
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