N
Nicolas Ray
Researcher at University of Geneva
Publications - 129
Citations - 7898
Nicolas Ray is an academic researcher from University of Geneva. The author has contributed to research in topics: Population & Spatial data infrastructure. The author has an hindex of 34, co-authored 113 publications receiving 7032 citations. Previous affiliations of Nicolas Ray include Swiss Institute of Bioinformatics & Zurich Insurance Group.
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Journal ArticleDOI
Reconstructing Native American population history
David Reich,David Reich,Nick Patterson,Desmond Campbell,Desmond Campbell,Arti Tandon,Arti Tandon,Stéphane Mazières,Stéphane Mazières,Nicolas Ray,María Victoria Parra,María Victoria Parra,Winston Rojas,Winston Rojas,Constanza Duque,Constanza Duque,Natalia Mesa,Natalia Mesa,Luis F. García,Omar Triana,Silvia Blair,Amanda Maestre,Juan Carlos Dib,Claudio M. Bravi,Claudio M. Bravi,Graciela Bailliet,Daniel Corach,Tábita Hünemeier,Tábita Hünemeier,Maria Cátira Bortolini,Francisco M. Salzano,Maria Luiza Petzl-Erler,Victor Acuña-Alonzo,Carlos A. Aguilar-Salinas,Samuel Canizales-Quinteros,Teresa Tusié-Luna,Laura Riba,Maricela Rodríguez-Cruz,Mardia López-Alarcón,Ramón Mauricio Coral-Vázquez,Thelma Canto-Cetina,Irma Silva-Zolezzi,Juan Carlos Fernández-López,Alejandra V. Contreras,Gerardo Jimenez-Sanchez,María José Gómez-Vázquez,Julio Molina,Angel Carracedo,Antonio Salas,Carla Gallo,Giovanni Poletti,David B. Witonsky,Gorka Alkorta-Aranburu,Rem I. Sukernik,Ludmila P. Osipova,Sardana A. Fedorova,René Vasquez,Mercedes Villena,Claudia Moreau,Ramiro Barrantes,David L. Pauls,Laurent Excoffier,Laurent Excoffier,Gabriel Bedoya,Francisco Rothhammer,Jean-Michel Dugoujon,Georges Larrouy,William Klitz,Damian Labuda,Judith R. Kidd,Kenneth K. Kidd,Anna Di Rienzo,Nelson B. Freimer,Alkes L. Price,Alkes L. Price,Andres Ruiz-Linares +75 more
TL;DR: It is shown that the initial peopling followed a southward expansion facilitated by the coast, with sequential population splits and little gene flow after divergence, especially in South America.
Journal ArticleDOI
Surfing during population expansions promotes genetic revolutions and structuration
Laurent Excoffier,Nicolas Ray +1 more
TL;DR: Using microbial populations, Hallatschek and colleagues have provided the first experimental evidence of surfing during spatial expansions and suggest that a single range expansion can create very complex patterns at neutral loci, mimicking adaptive processes and resembling postglacial segregation of clades from distinct refuge areas.
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Intra-Deme Molecular Diversity in Spatially Expanding Populations
TL;DR: A simulation study examining the effect of a recent spatial expansion on the pattern of molecular diversity within a deme finds that the shape of the gene genealogies and the overall pattern of diversity within demes depend not only on the age of the expansion but also on the level of gene flow between neighboring demes, as measured by the product Nm.
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Statistical evaluation of alternative models of human evolution
Nelson J. R. Fagundes,Nicolas Ray,Mark A. Beaumont,Samuel Neuenschwander,Francisco M. Salzano,Sandro L. Bonatto,Laurent Excoffier +6 more
TL;DR: Using DNA data from 50 nuclear loci sequenced in African, Asian and Native American samples, it is shown that a simple African replacement model with exponential growth has a higher probability as compared with alternative multiregional evolution or assimilation scenarios.
Journal ArticleDOI
Genetic Variation and Population Structure in Native Americans
Sijia Wang,Cecil M. Lewis,Mattias Jakobsson,Sohini Ramachandran,Nicolas Ray,Gabriel Bedoya,Winston Rojas,María Victoria Parra,Julio Molina,Carla Gallo,Guido Mazzotti,Giovanni Poletti,Kim Hill,A. M. Hurtado,Damian Labuda,William Klitz,Ramiro Barrantes,Maria Cátira Bortolini,Francisco M. Salzano,Maria Luiza Petzl-Erler,Luiza T. Tsuneto,Elena Llop,Francisco Rothhammer,Francisco Rothhammer,Laurent Excoffier,Marcus W. Feldman,Noah A. Rosenberg,Andres Ruiz-Linares +27 more
TL;DR: Evidence is observed of a higher level of diversity and lower level of population structure in western South America compared to eastern South America, a relative lack of differentiation between Mesoamerican and Andean populations, and a partial agreement on a local scale between genetic similarity and the linguistic classification of populations.