Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/98800
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Type: Journal article
Title: Evolutionary novelty in a butterfly wing pattern through enhancer shuffling
Author: Wallbank, R.
Baxter, S.
Pardo-Diaz, C.
Hanly, J.
Martin, S.
Mallet, J.
Dasmahapatra, K.
Salazar, C.
Joron, M.
Nadeau, N.
McMillan, W.
Jiggins, C.
Citation: PLoS Biology, 2016; 14(1):e1002353-1-e1002353-16
Publisher: Public Library of Science
Issue Date: 2016
ISSN: 1544-9173
1545-7885
Statement of
Responsibility: 
Richard W. R. Wallbank, Simon W. Baxter, Carolina Pardo-Diaz, Joseph J. Hanly, Simon H. Martin, James Mallet, Kanchon K. Dasmahapatra, Camilo Salazar, Mathieu Joron, Nicola Nadeau, W. Owen McMillan, Chris D. Jiggins
Abstract: An important goal in evolutionary biology is to understand the genetic changes underlying novel morphological structures. We investigated the origins of a complex wing pattern found among Amazonian Heliconius butterflies. Genome sequence data from 142 individuals across 17 species identified narrow regions associated with two distinct red colour pattern elements, dennis and ray. We hypothesise that these modules in non-coding sequence represent distinct cis-regulatory loci that control expression of the transcription factor optix, which in turn controls red pattern variation across Heliconius. Phylogenetic analysis of the two elements demonstrated that they have distinct evolutionary histories and that novel adaptive morphological variation was created by shuffling these cis-regulatory modules through recombination between divergent lineages. In addition, recombination of modules into different combinations within species further contributes to diversity. Analysis of the timing of diversification in these two regions supports the hypothesis of introgression moving regulatory modules between species, rather than shared ancestral variation. The dennis phenotype introgressed into Heliconius melpomene at about the same time that ray originated in this group, while ray introgressed back into H. elevatus much more recently. We show that shuffling of existing enhancer elements both within and between species provides a mechanism for rapid diversification and generation of novel morphological combinations during adaptive radiation.
Keywords: Animals; Butterflies; Pigmentation; Gene Expression Regulation; Phenotype; Biological Evolution; Wings, Animal
Rights: © 2016 Wallbank et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
RMID: 0030042322
DOI: 10.1371/journal.pbio.1002353
Appears in Collections:Genetics publications

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