Choosing the fittest as a speciation mechanism

Details Choosing the fittest as a speciation mechanism Choosing the fittest as a speciation mechanism

2011-05-04

arxiv.org/abs/1105.0818v1

Biology

Quantitative Biology

Populations and Evolution

22 pages, 6 figures

Scientific paper

When a population inhabits an inhomogeneous environment, the fitness value of traits can vary with the position in the environment. Gene flow caused by random mating can nevertheless prevent that a sexually reproducing population splits into different species under such circumstances. This is the problem of sympatric speciation. However, mating need not be entirely random. Here, we present a model where the individually advantageous preference for partners of high fitness can lead to genetic clustering as a precondition for speciation. In simulations, in appropriate parameter regimes, our model leads to the rapid fixation of the corresponding alleles.

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