Divergent selection and heterogeneous genomic divergence
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.
The genomics of speciation-with-gene-flow.
Ecological explanations for (incomplete) speciation.
Ecological speciation: Ecological speciation
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 this…
Heterogeneous Genomic Differentiation Between Walking-Stick Ecotypes: “Isolation by Adaptation” and Multiple Roles for Divergent Selection
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.
Magic traits in speciation: 'magic' but not rare?
REPRODUCTIVE ISOLATION CAUSED BY NATURAL SELECTION AGAINST IMMIGRANTS FROM DIVERGENT HABITATS
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.
Ecological divergence exhibits consistently positive associations with reproductive isolation across disparate taxa.
- D. J. Funk, P. Nosil, W. Etges
- Biology, Environmental ScienceProceedings of the National Academy of Sciences…
- 28 February 2006
This work quantifies ecological divergence for >500 species pairs from eight plant, invertebrate, and vertebrate taxa and statistically isolate its association with reproductive isolation and demonstrates a highly consistent and significant positive association between ecological divergence and reproductive isolation across taxa.
Host-plant adaptation drives the parallel evolution of reproductive isolation
It is reported that divergent selection for host adaptation, and not genetic drift, has promoted the parallel evolution of sexual isolation in this species, a clear demonstration that host-plant adaptation can play a crucial and repeatable role in the early stages of speciation.