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Genomic architecture and introgression shape a butterfly radiation

Edelman, NB; Frandsen, PB; Miyagi, M; Clavijo, B; Davey, J; Dikow, RB; García-Accinelli, G; ... Mallet, J; + view all (2019) Genomic architecture and introgression shape a butterfly radiation. Science , 366 (6465) pp. 594-599. 10.1126/science.aaw2090. Green open access

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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.

Type: Article
Title: Genomic architecture and introgression shape a butterfly radiation
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1126/science.aaw2090
Publisher version: https://doi.org/10.1126/science.aaw2090
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Genetics, Evolution and Environment
URI: https://discovery.ucl.ac.uk/id/eprint/10086226
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