Genomic architecture and introgression shape a butterfly radiation

Nathaniel B. Edelman, Paul B. Frandsen, Michael Miyagi, Bernardo Clavijo, John Davey, Rebecca B. Dikow, Gonzalo García-Accinelli, Steven M. Van Belleghem, Nick Patterson, Daniel E. Neafsey, Richard Challis, Sujai Kumar, Gilson R.P. Moreira, Camilo Salazar, Mathieu Chouteau, Brian A. Counterman, Riccardo Papa, Mark Blaxter, Robert D. Reed, Kanchon K. DasmahapatraMarcus Kronforst, Mathieu Joron, Chris D. Jiggins, W. Owen McMillan, Federica Di Palma, Andrew J. Blumberg, John Wakeley, David Jaffe, James Mallet

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

We used 20 de novo genome assemblies to probe the speciation history and architecture of gene flow in rapidly radiating Heliconius butterflies. Our tests to distinguish incomplete lineage sorting from introgression indicate that gene flow has obscured several ancient phylogenetic relationships in this group over large swathes of the genome. Introgressed loci are underrepresented in low-recombination and gene-rich regions, consistent with the purging of foreign alleles more tightly linked to incompatibility loci. Here, we identify a hitherto unknown inversion that traps a color pattern switch locus. We infer that this inversion was transferred between lineages by introgression and is convergent with a similar rearrangement in another part of the genus. These multiple de novo genome sequences enable improved understanding of the importance of introgression and selective processes in adaptive radiation.

Original languageEnglish (US)
Pages (from-to)594-599
Number of pages6
JournalScience
Volume366
Issue number6465
DOIs
StatePublished - Nov 1 2019

All Science Journal Classification (ASJC) codes

  • General

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