Detecting genetic drift versus selection in human evolution
AUTOR(ES)
Ackermann, Rebecca Rogers
FONTE
National Academy of Sciences
RESUMO
Recent paleoanthropological discoveries reveal a diverse, potentially speciose human fossil record. Such extensive morphological diversity results from the action of divergent evolutionary forces on an evolving lineage. Here, we apply quantitative evolutionary theory to test whether random evolutionary processes alone can explain the morphological diversity seen among fossil australopith and early Homo crania from the Plio–Pleistocene. We show that although selection may have played an important role in diversifying hominin facial morphology in the late Pliocene, this is not the case during the early evolution of the genus Homo, where genetic drift was probably the primary force responsible for facial diversification.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=539739Documentos Relacionados
- Drift, admixture, and selection in human evolution: a study with DNA polymorphisms.
- Genetic variation in a Pacific Island land snail: population history versus current drift and selection.
- Genetic drift can dominate short-term human immunodeficiency virus type 1 nef quasispecies evolution in vivo.
- GENETIC DRIFT AND NATURAL SELECTION IN EXPERIMENTAL POPULATIONS OF DROSOPHILA PSEUDOOBSCURA
- Evolution of Lamivudine Resistance in Human Immunodeficiency Virus Type 1-Infected Individuals: the Relative Roles of Drift and Selection