Reinforcement drives rapid allopatric speciation

@article{Hoskin2005ReinforcementDR,
  title={Reinforcement drives rapid allopatric speciation},
  author={Conrad J. Hoskin and Megan Higgie and Keith R Mcdonald and Craig C Moritz},
  journal={Nature},
  year={2005},
  volume={437},
  pages={1353-1356}
}
Allopatric speciation results from geographic isolation between populations. In the absence of gene flow, reproductive isolation arises gradually and incidentally as a result of mutation, genetic drift and the indirect effects of natural selection driving local adaptation. In contrast, speciation by reinforcement is driven directly by natural selection against maladaptive hybridization. This gives individuals that choose the traits of their own lineage greater fitness, potentially leading to… 

Reinforcement as an initiator of population divergence and speciation

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Does character displacement initiate speciation? Evidence of reduced gene flow between populations experiencing divergent selection

A slight, but statistically significant, reduction in gene flow is found between selective environments, suggesting that reproductive isolation, and potentially ecological speciation, might indeed evolve as an indirect consequence of character displacement.

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A perspective on the context and evolutionary significance of hybridization during speciation is offered, highlighting issues of current interest and debate and suggesting that the Dobzhansky–Muller model of hybrid incompatibilities requires a broader interpretation.

Sexual selection drives speciation in an Amazonian frog

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Reinforcement’s incidental effects on reproductive isolation between conspecifics

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Mechanisms of reinforcement in natural and simulated polymorphic populations

Congruence of the results for allele frequencies versus fixation probabilities suggests that similar patterns of reinforcement are expected during different stages of the speciation process.

Is cascade reinforcement likely when sympatric and allopatric populations exchange migrants?

The results show that when sympatric and allopatric populations reside in the same environment and only differ in their exposure to maladaptive hybridization, migration between them generally inhibits the evolution of cascade by spreading the reinforcement alleles from sympatry into allop atry and erasing RCD.

Geographic contact drives increased reproductive isolation in two cryptic Empidonax flycatchers

It is shown that a period of contact and elevated hybridization between sympatric eastern North American populations of two cryptic bird species preceded a major increase in reproductive isolation between these populations within the last ten thousand years.

Persistence in Peripheral Refugia Promotes Phenotypic Divergence and Speciation in a Rainforest Frog

The results show that climate shifts can promote genetic and phenotypic divergence and, potentially, speciation and direct attention toward incorporating adaptive traits into phylogeographic studies to better resolve the mechanisms of speciation.
...

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