title: Inferring positive selection in humans from genomic data.
abstract: Adaptation can be described as an evolutionary process that leads to an adjustment of the phenotypes of a population to their environment. In the classical view, new mutations can introduce novel phenotypic features into a population that leave footprints in the genome after fixation, such as selective sweeps. Alternatively, existing genetic variants may become beneficial after an environmental change and increase in frequency. Although they may not reach fixation, they may cause a shift of the optimum of a phenotypic trait controlled by multiple loci. With the availability of polymorphism data from various organisms, including humans and chimpanzees, it has become possible to detect molecular evidence of adaptation and to estimate the strength and target of positive selection. In this review, we discuss the two competing models of adaptation and suitable approaches for detecting the footprints of positive selection on the molecular level.
authors.affiliation: Section of Evolutionary Biology, Department of Biology II, University of Munich, Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Wollstein
authors.affiliation: Section of Evolutionary Biology, Department of Biology II, University of Munich, Großhaderner Str. 2, 82152 Planegg-Martinsried, Germany.
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Stephan
keywords: Evolution; Polygenic adaptation; Selective sweep
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