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Proc Natl Acad Sci U S A. 2015 Jul 7;112(27):8362-6. doi: 10.1073/pnas.1503926112. Epub 2015 Jun 22.

The butterfly plant arms-race escalated by gene and genome duplications.

Author information

1
Division of Biological Sciences, University of Missouri, Columbia, MO 65211; Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721; Department of Plant and Microbial Biology, University of California, Berkeley, CA 94720;
2
Department of Entomology, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany;
3
Institute of Aquaculture, University of Stirling, Stirling FK9 4LA, Scotland, United Kingdom;
4
Department of Biology, University of Turku, FI-20014 Turku, Finland;
5
Leibniz Institute for Age Research, Fritz Lipmann Institute, 07745 Jena, Germany; Institute for Biochemistry I, University of Cologne, 50931 Koeln, Germany;
6
McGill Centre for Bioinformatics, McGill University, Montreal, QC, Canada H3A 0E9;
7
Department of Biology, Pennsylvania State University, University Park, PA 16803; Department of Biological Science, California State University Fullerton, Fullerton, CA 92831;
8
Department of Biology, Pennsylvania State University, University Park, PA 16803;
9
Division of Biological Sciences, University of Missouri, Columbia, MO 65211;
10
Biosystematics Group, Plant Sciences, Wageningen University, Wageningen 6700 AA, The Netherlands;
11
School of Plant Biology, The University of Western Australia, West Perth, WA 6005 Australia; Science Directorate, Kings Park and Botanic Gardens, West Perth, WA 6005, Australia;
12
Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada T6G 2E9;
13
Department of Biology, McGill University, Montreal, QC, Canada H3A1B1;
14
Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada M5S 3B2;
15
Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, AZ 85721;
16
Division of Animal Sciences, University of Missouri, Columbia, MO 65211; Informatics Institute, University of Missouri, Columbia, MO 65211;
17
Division of Biological Sciences, University of Missouri, Columbia, MO 65211; Informatics Institute, University of Missouri, Columbia, MO 65211; chris.wheat@zoologi.su.se piresjc@missouri.edu.
18
Department of Zoology, Stockholm University, S-106 91 Stockholm, Sweden chris.wheat@zoologi.su.se piresjc@missouri.edu.

Abstract

Coevolutionary interactions are thought to have spurred the evolution of key innovations and driven the diversification of much of life on Earth. However, the genetic and evolutionary basis of the innovations that facilitate such interactions remains poorly understood. We examined the coevolutionary interactions between plants (Brassicales) and butterflies (Pieridae), and uncovered evidence for an escalating evolutionary arms-race. Although gradual changes in trait complexity appear to have been facilitated by allelic turnover, key innovations are associated with gene and genome duplications. Furthermore, we show that the origins of both chemical defenses and of molecular counter adaptations were associated with shifts in diversification rates during the arms-race. These findings provide an important connection between the origins of biodiversity, coevolution, and the role of gene and genome duplications as a substrate for novel traits.

KEYWORDS:

chemical defenses; coevolution; diversification; evolutionary novelty; phylogenomics

PMID:
26100883
PMCID:
PMC4500235
DOI:
10.1073/pnas.1503926112
[Indexed for MEDLINE]
Free PMC Article

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