Widespread Signals of Convergent Adaptation to High Altitude in Asia and America

Foll, Matthieu; Gaggiotti, Oscar; Daub, Joséphine; Vatsiou, Alexandra; Excoffier, Laurent (2014). Widespread Signals of Convergent Adaptation to High Altitude in Asia and America. American journal of human genetics, 95(4), pp. 394-407. Cell Press 10.1016/j.ajhg.2014.09.002

Text 1-s2.0-S0002929714003851-main.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (18MB)

Living at high altitude is one of the most difficult challenges that humans had to cope with during their evolution. Whereas several genomic studies have revealed some of the genetic bases of adaptations in Tibetan, Andean, and Ethiopian populations, relatively little evidence of convergent evolution to altitude in different continents has accumulated. This lack of evidence can be due to truly different evolutionary responses, but it can also be due to the low power of former studies that have mainly focused on populations from a single geographical region or performed separate analyses on multiple pairs of populations to avoid problems linked to shared histories between some populations. We introduce here a hierarchical Bayesian method to detect local adaptation that can deal with complex demographic histories. Our method can identify selection occurring at different scales, as well as convergent adaptation in different regions. We apply our approach to the analysis of a large SNP data set from low- and high-altitude human populations from America and Asia. The simultaneous analysis of these two geographic areas allows us to identify several candidate genome regions for altitudinal selection, and we show that convergent evolution among continents has been quite common. In addition to identifying several genes and biological processes involved in high-altitude adaptation, we identify two specific biological pathways that could have evolved in both continents to counter toxic effects induced by hypoxia.

Interest & Impact

Downloads

3 since deposited on 09 Sep 2015
0 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item