Abstracts (first author)


The influence of the genetic architecture of a trait on local adaptation in a subdivided population

Author(s): Geroldinger L, Bürger R


We investigate the consequences of spatially varying, stabilizing or directional selection on a quantitative trait in a subdivided population. The influence of the genetic architecture of the trait on local adaptation and on differentiation is explored by employing a deterministic two-locus, two-deme model. Our analysis demonstrates that the critical migration rate, below which local adaptation is possible, depends crucially on the genetic architecture of the trait. Under stabilizing selection, but with different optima in the demes, strong recombination may facilitate local adaptation by enhancing genetic variability. In contrast, with directional selection in opposite direction, local adaptation is maximized by a concentrated genetic architecture, i.e., by a major locus and a tightly linked minor one. Complementing the work of Yeaman and Whitlock (2011), who found that concentrated genetic architectures may evolve in subdivided populations under directional selection, we showed that such architectures considerably facilitate local adaptation and increased differentiation.


Chairman: Octávio S. Paulo
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XIV Congress of the European Society for Evolutionary Biology

Organization Team
Department of Animal Biology (DBA)
Faculty of Sciences of the University of Lisbon
P-1749-016 Lisbon


Computational Biology & Population Genomics Group