Consequences of diverse evolutionary processes on american genetic gradients of modern humans.

ABSTRACT: European genetic gradients of modern humans were initially interpreted as a consequence of the demic diffusion of expanding Neolithic farmers. However, recent studies showed that these gradients may also be influenced by other evolutionary processes such as population admixture or range contractions. Genetic gradients were observed in the Americas, although their specific evolutionary causes were not investigated. Here we extended the approach used to study genetic gradients in Europe to analyze the influence of diverse evolutionary scenarios on American genetic gradients. Using extensive computer simulations, we evaluated the impact of (i) admixture between expansion waves of modern humans, (ii) the presence of ice-sheets during the last glacial maximum (LGM) and (iii) long-distance dispe

SUBMITTER: Branco C 

PROVIDER: S-EPMC6221893 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature