10.1186_1471-2148-13-24.pdf (1.13 MB)
Download file

The influence of habitats on female mobility in Central and Western Africa inferred from human mitochondrial variation

Download (1.13 MB)
journal contribution
posted on 29.10.2013, 15:59 by Valeria Montano, Veronica Marcari, Mariano Pavanello, Okorie Anyaele, David Comas, Giovanni Destro-Bisol, Chiara Batini
Background:When studying the genetic structure of human populations, the role of cultural factors may be difficult to ascertain due to a lack of formal models. Linguistic diversity is a typical example of such a situation. Patrilocality, on the other hand, can be integrated into a biological framework, allowing the formulation of explicit working hypotheses. The present study is based on the assumption that patrilocal traditions make the hypervariable region I of the mtDNA a valuable tool for the exploration of migratory dynamics, offering the opportunity to explore the relationships between genetic and linguistic diversity. We studied 85 Niger-Congo-speaking patrilocal populations that cover regions from Senegal to Central African Republic. A total of 4175 individuals were included in the study. Results:By combining a multivariate analysis aimed at investigating the population genetic structure, with a Bayesian approach used to test models and extent of migration, we were able to detect a stepping-stone migration model as the best descriptor of gene flow across the region, with the main discontinuities corresponding to forested areas. Conclusions:Our analyses highlight an aspect of the influence of habitat variation on human genetic diversity that has yet to be understood. Rather than depending simply on geographic linear distances, patterns of female genetic variation vary substantially between savannah and rainforest environments. Our findings may be explained by the effects of recent gene flow constrained by environmental factors, which superimposes on a background shaped by pre-agricultural peopling.

History

Citation

BMC Evolutionary Biology, 2013, 13:24

Version

VoR (Version of Record)

Published in

BMC Evolutionary Biology

Publisher

BioMed Central Ltd

eissn

1471-2148

Copyright date

2013

Available date

29/10/2013

Publisher version

http://www.biomedcentral.com/1471-2148/13/24

Language

en

Usage metrics

Categories

Keywords

Exports