Genetics: Early Online, published on November 29, 2017 as 10.1534/genetics.117.300551 1 Relaxed selection during a recent human 2 expansion 3 4 5 Peischl, S.1,2,3*, Dupanloup, I.1,2,4*, Foucal, A.1,2, Jomphe, M.5, Bruat, V.6, Grenier, J.-C.6, Gouy, A. 1,2, 6 Gilbert, K.J. 1,2, Gbeha, E.6, Bosshard, L.1,2, Hip-Ki, E.6, Agbessi,M.6, Hodgkinson, A.6,7, Vézina, H.5, 7 Awadalla, P.6,8, and Excoffier, L.1,2 8 1 9 CMPG, Institute of Ecology an Evolution, University of Berne, 3012 Berne, Switzerland 2 10 Swiss Institute of Bioinformatics, 1015 Lausanne, Switzerland 3 11 Interfaculty Bioinformatics Unit, University of Berne, 3012 Berne, Switzerland 12 4 Swiss Integrative Center for Human Health SA, 1700 Fribourg, Switzerland 5 13 Balsac Project, University of Quebec at Chicoutimi, Saguenay, Canada 6 14 Hôpital Ste-Justine, University of Montréal, Montréal, Canada 7 15 Department of Medical and Molecular Genetics, Guy's Hospital, King’s College London, London, UK 8 16 Ontario Institute for Cancer Research, Department of Molecular Genetics, University of Toronto, 17 Toronto Canada 18 19 Running title: Relaxed selection during a recent human expansion 20 Keywords: range expansion, Quebec, mutation load, genetic drift 21 * Equal contribution 22 Correspondence 23 Stephan Peischl & Laurent Excoffier 24 CMPG, Institute of Ecology and Evolution 25 University of Berne 26 Baltzerstrasse 6 27 3012 Berne, Switzerland 28 Email:
[email protected] 29
[email protected] Copyright 2017. 30 Abstract 31 Humans have colonized the planet through a series of range expansions, which deeply impacted 32 genetic diversity in newly settled areas and potentially increased the frequency of deleterious mutations 33 on expanding wave fronts.