Abstract
Estimating natural selection in the wild is still a major challenge for evolutionary biologists. When the genetic basis of the phenotypic character under selection is simple, it is possible to derive population genetics models from which fitness can be estimated. I will illustrate the use of such models from two examples: directional selection during adaptation to a new environment in sticklebacks, and balancing selection on female color morphs in damselflies. Both cases reveal surprisingly strong natural selection.
Arnaud Le Rouzic
Laboratoire Evolution Genome et Speciation, CNRS-LEGS-UPR9034, Université Paris-Sud 11, 91198 Gif-sur-Yvette Cedex, France