30 Oral - Evolution I
Thursday April 07, 6:00 PM - 6:15 PM
Widespread introgression across a phylogeny of 155 Drosophila genomes
Authors: Anton Suvorov 1; Bernard Kim 2; Jeremy Wang 3; Ellie Armstrong 2; David Peede 3; Emmanuel D’Agostino 3; Donald Price 4; Peter Wadell 5; Michael Lang 6; Virginie Courtier-Orgogozo 6; Jean David 7,8; Dmitri Petrov 2; Daniel Matute 3; Daniel Schrider 1; Aaron A. Comeault Comeault 9
Affiliations: 1) Department of Genetics, University of North Carolina, Chapel Hill, North Carolina. USA; 2) Department of Biology, Stanford University, Stanford, CA, USA; 3) Biology Department, University of North Carolina, Chapel Hill, North Carolina. USA; 4) School of Life Sciences, University of Nevada, Las Vegas. USA; 5) School of Fundamental Sciences, Massey University, Palmerston North. New Zealand; 6) CNRS, Institut Jacques Monod, Université de Paris. France; 7) Laboratoire Evolution, Génomes, Comportement, Ecologie (EGCE) CNRS, IRD, Univ. Paris-sud, Université Paris-Saclay, Gif sur Yvette, France; 8) Institut de Systématique, Evolution, Biodiversité, CNRS, MNHN, UPMC, EPHE, Muséum National d’Histoire Naturelle, Sorbonne Universités, Paris, France; 9) Molecular Ecology & Evolution Group, School of Natural Sciences, Bangor University, Bangor, Gwynedd LL57 2DGA, UK
Keywords: g. phylogenetics; t. bioinformatic and genome tools
Genome-scale sequence data have invigorated the study of hybridization and introgression, 28 particularly in animals. However, outside of a few notable cases, we lack systematic tests for 29 introgression at a larger phylogenetic scale across entire clades. Here we leverage 155 genome 30 assemblies, from 149 species, to generate a fossil-calibrated phylogeny and conduct multilocus 31 tests for introgression across nine monophyletic radiations within the genus Drosophila. Using 32 complementary phylogenomic approaches, we identify widespread introgression across the 33 evolutionary history of Drosophila. Mapping gene-tree discordance onto the phylogeny revealed 34 that both ancient and recent introgression has occurred across most of the nine clades that we 35 examined. Our results provide the first evidence of introgression occurring across the evolutionary 36 history of Drosophila and highlight the need to continue to study the evolutionary consequences 37 of hybridization and introgression in this genus and across the Tree of Life.