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Butterfly genome reveals promiscuous exchange of mimicry adaptations among species

MPG-Autoren
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Ahn,  Seung-Joon
Research Group Dr. H. Vogel, Genomics, Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society;
IMPRS on Ecological Interactions, MPI for Chemical Ecology, Max Planck Society;

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Heckel,  David G.
Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society;

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Pauchet,  Yannick
Research Group Dr. Y. Pauchet, Molecular Biology of the Insect Digestive System, Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society;

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Vogel,  Heiko
Research Group Dr. H. Vogel, Genomics, Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society;

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Zitation

Dasmahapatra, K. K., Walters, J. R., Briscoe, A. D., Davey, J. W., Whibley, A., Nadeau, N. J., et al. (2012). Butterfly genome reveals promiscuous exchange of mimicry adaptations among species. Nature, 487, 94-98. doi:10.1038/nature11041.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-000F-9C22-A
Zusammenfassung
The evolutionary importance of hybridization and introgression has long been debated1. Hybrids are usually rare and unfit, but even infrequent hybridization can aid adaptation by transferring beneficial traits between species. Here we use genomic tools to investigate introgression in Heliconius, a rapidly radiating genus of neotropical butterflies widely used in studies of ecology, behaviour, mimicry and speciation2,3,4,5. We sequenced the genome of Heliconius melpomene and compared it with other taxa to investigate chromosomal evolution in Lepidoptera and gene flow among multiple Heliconius species and races. Among 12,669 predicted genes, biologically important expansions of families of chemosensory and Hox genes are particularly noteworthy. Chromosomal organization has remained broadly conserved since the Cretaceous period, when butterflies split from the Bombyx (silkmoth) lineage. Using genomic resequencing, we show hybrid exchange of genes between three co-mimics, Heliconius melpomene, Heliconius timareta and Heliconius elevatus, especially at two genomic regions that control mimicry pattern. We infer that closely related Heliconius species exchange protective colour-pattern genes promiscuously, implying that hybridization has an important role in adaptive radiation.