Primate phylogenomics uncovers multiple rapid radiations and ancient interspecific introgression.

TitlePrimate phylogenomics uncovers multiple rapid radiations and ancient interspecific introgression.
Publication TypeJournal Article
Year of Publication2020
AuthorsVanderpool, D, Minh, BQuang, Lanfear, R, Hughes, D, Murali, S, Harris, RA, Raveendran, M, Muzny, DM, Hibbins, MS, Williamson, RJ, Gibbs, RA, Worley, KC, Rogers, J, Hahn, MW
JournalPLoS Biol
Date Published2020 Dec
KeywordsAnimals, Biological Evolution, Cercopithecidae, Computational Biology, Databases, Genetic, Fossils, Gene Flow, Genetic Introgression, Genome, Models, Genetic, Phylogeny, Primates, Sequence Analysis, DNA

Our understanding of the evolutionary history of primates is undergoing continual revision due to ongoing genome sequencing efforts. Bolstered by growing fossil evidence, these data have led to increased acceptance of once controversial hypotheses regarding phylogenetic relationships, hybridization and introgression, and the biogeographical history of primate groups. Among these findings is a pattern of recent introgression between species within all major primate groups examined to date, though little is known about introgression deeper in time. To address this and other phylogenetic questions, here, we present new reference genome assemblies for 3 Old World monkey (OWM) species: Colobus angolensis ssp. palliatus (the black and white colobus), Macaca nemestrina (southern pig-tailed macaque), and Mandrillus leucophaeus (the drill). We combine these data with 23 additional primate genomes to estimate both the species tree and individual gene trees using thousands of loci. While our species tree is largely consistent with previous phylogenetic hypotheses, the gene trees reveal high levels of genealogical discordance associated with multiple primate radiations. We use strongly asymmetric patterns of gene tree discordance around specific branches to identify multiple instances of introgression between ancestral primate lineages. In addition, we exploit recent fossil evidence to perform fossil-calibrated molecular dating analyses across the tree. Taken together, our genome-wide data help to resolve multiple contentious sets of relationships among primates, while also providing insight into the biological processes and technical artifacts that led to the disagreements in the first place.

Alternate JournalPLoS Biol
PubMed ID33270638
PubMed Central IDPMC7738166

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