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Selected Publication:

Type of publication: PhD Thesis
Type of document:

Year: 2012

Authors: Bank, Claudia

Title: The limits to parapatric speciation.

Other title: Die Grenzen parapatrischer Artbildung

Source: PhD-Arbeit, Vet. Med. Univ. Wien, pp. 76.


Advisor(s):

Hermisson Joachim
Schlötterer Christian

Vetmed Research Units:
Institute of Population Genetics


Graduation date: 06.12.13


Abstract:
In the research area of speciation, many questions remain unanswered. On the one hand, it is hard to unambiguously detect ongoing speciation in the rst place. On the other hand, the common conditions under which speciation takes place are still unclear. Theoretical speciation research serves to develop models in order to predict which processes are likely to contribute to a speciation process under certain conditions. The aim of my PhD was to develop and analyze models of speciation in the presence of gene ow, commonly referred to as a case of \parapatric" speciation. By allowing for any amount of gene ow to take place between two diverging populations, parapatry is possibly the most general geographical scenario of speciation. I used classical migration-selection models in order to determine the maximum rates of gene ow which allow for the buildup of genetic incompatibilities as a rst step to speciation. In the resulting publication, we present an elaborate analytical treatment of a continent-island model that yields important implications for the study of speciation in the presence of gene ow. Another manuscript in preparation shows how the results from the continent-island model transfer to the case of two islands with bidirectional gene ow. In addition, I have used a multilocus algebra approach in order to study the conditions for the completion of a speciation process by reinforcement, which is de ned as the selection for increased premating isolation due to un t hybrids. This work resulted in a publication that presents an extension of the frequently used quasi-linkage equilibrium approximation to the case of strong selection, and that further yields some interesting implications on the mechanisms that are likely to complete a speciation process via reinforcement.


Publication(s) resulting from University thesis:

Bank, C; Bürger, R; Hermisson, J (2012): The limits to parapatric speciation: Dobzhansky-Muller incompatibilities in a continent-island model. Genetics. 2012; 191(3):845-863
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Bank, C; Hermisson, J; Kirkpatrick, M (2012): Can reinforcement complete speciation? Evolution. 2012; 66(1):229-239

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