Genomic architecture and introgression shape a butterfly radiation
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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 01, 2019
- Source ID
- 10.1126/science.aaw2090
Entities
People
- Andrew J. Blumberg
- Bernardo J. Clavijo
- Brian A Counterman
- Camilo Salazar
- Chris D. Jiggins
- Daniel Neafsey
- David Jaffe
- Federica Di Palma
- Gilson R. P. Moreira
- Gonzalo García-Accinelli
- James Mallet
- John W Davey
- John Wakeley
- Kanchon K. Dasmahapatra
- Marcus R. Kronforst
- Mark Blaxter
- Mathieu Chouteau
- Mathieu Joron
- Miriam Miyagi
- Nathaniel B Edelman
- Nick Patterson
- Paul B. Frandsen
- Rebecca B Dikow
- Riccardo Papa
- Richard Challis
- Robert D Reed
- Steven M Van Belleghem
- Sujai Kumar
- W. Owen McMillan
Organizations
- 10X Genomics
- Agence Nationale de la Recherche
- Air Force Office of Scientific Research
- Biotechnology and Biological Sciences Research Council
- Brigham Young University
- Broad Institute
- Cornell University
- Earlham Institute
- European Commission
- Federal University of Rio Grande do Sul
- Harvard T.H. Chan School of Public Health
- Harvard University
- Mississippi State University
- National Council for Scientific and Technological Development
- National Institutes of Health
- National Science Foundation
- Natural Environment Research Council
- Natural Sciences and Engineering Research Council
- Our Lady of the Rosary University
- Smithsonian Institution
- Smithsonian Tropical Research Institute
- University of Cambridge
- University of Chicago
- University of Edinburgh
- University of Montpellier
- University of Texas at Austin
- University of York
- Wellcome Sanger Institute