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Evans BJ, Tosi AJ, Zeng K, et al. Speciation over the edge: gene flow among non-human primate species across a formidable biogeographic barrier. R Soc Open Sci. 2017;4(10):170351doi: 10.1098/rsos.170351.
Evans, B. J., Tosi, A. J., Zeng, K., Dushoff, J., Corvelo, A., & Melnick, D. J. (2017). Speciation over the edge: gene flow among non-human primate species across a formidable biogeographic barrier. Royal Society open science, 4(10), 170351. https://doi.org/10.1098/rsos.170351
Evans, Ben J, et al. "Speciation over the edge: gene flow among non-human primate species across a formidable biogeographic barrier." Royal Society open science vol. 4,10 (2017): 170351. doi: https://doi.org/10.1098/rsos.170351
Evans BJ, Tosi AJ, Zeng K, Dushoff J, Corvelo A, Melnick DJ. Speciation over the edge: gene flow among non-human primate species across a formidable biogeographic barrier. R Soc Open Sci. 2017 Oct 18;4(10):170351. doi: 10.1098/rsos.170351. eCollection 2017 Oct. PMID: 29134059; PMCID: PMC5666242.
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R Soc Open Sci. 2017 Oct 18;4(10):170351. doi: 10.1098/rsos.170351. eCollection 2017 Oct.

Speciation over the edge: gene flow among non-human primate species across a formidable biogeographic barrier.

Royal Society open science

Ben J Evans, Anthony J Tosi, Kai Zeng, Jonathan Dushoff, André Corvelo, Don J Melnick

Affiliations

  1. Biology Department, Life Sciences Building Room 328, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S4K1.
  2. Department of Ecology, Evolution, and Environmental Biology, Columbia University, 10th floor Schermerhorn Extension, 119th Street and Amsterdam Avenue, New York, NY 10027, USA.
  3. Anthropology Department, Kent State University, 238 Lowry Hall, Kent, OH 44242, USA.
  4. Department of Animal and Plant Sciences, University of Sheffield, Sheffield, UK.
  5. New York Genome Center, 101 Avenue of the Americas, New York, NY 10013, USA.

PMID: 29134059 PMCID: PMC5666242 DOI: 10.1098/rsos.170351

Abstract

Many genera of terrestrial vertebrates diversified exclusively on one or the other side of Wallace's Line, which lies between Borneo and Sulawesi islands in Southeast Asia, and demarcates one of the sharpest biogeographic transition zones in the world. Macaque monkeys are unusual among vertebrate genera in that they are distributed on both sides of Wallace's Line, raising the question of whether dispersal across this barrier was an evolutionary one-off or a more protracted exchange-and if the latter, what were the genomic consequences. To explore the nature of speciation over the edge of this biogeographic divide, we used genomic data to test for evidence of gene flow between macaque species across Wallace's Line after macaques colonized Sulawesi. We recovered evidence of post-colonization gene flow, most prominently on the X chromosome. These results are consistent with the proposal that gene flow is a pervasive component of speciation-even when barriers to gene flow seem almost insurmountable.

Keywords: Wallace’s Line; X chromosome; gene flow; genomics; mechanisms of speciation; primate evolution

Conflict of interest statement

We have no competing interests.

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