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Journal Article

Two genomes of highly polyphagous lepidopteran pests (Spodoptera frugiperda, Noctuidae) with different host-plant ranges

MPS-Authors
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Kuwar,  Suyog
Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society;

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Bretschneider,  Anne
Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society;
IMPRS International Max Planck Research School for Global Biogeochemical Cycles, Max Planck Institute for Biogeochemistry, Max Planck Society;

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Ahn,  Seung-Joon
Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society;

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

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Khan,  Sher Afzal
Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society;
IMPRS International Max Planck Research School for Global Biogeochemical Cycles, Max Planck Institute for Biogeochemistry, 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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Groot,  Astrid T.
Department of Entomology, Prof. D. G. Heckel, MPI for Chemical Ecology, Max Planck Society;

External Ressource
Fulltext (public)

HEC381.pdf
(Publisher version), 3MB

Supplementary Material (public)

HEC381s1.zip
(Supplementary material), 16MB

Citation

Gouin, A., Bretaudeau, A., Nam, K., Gimenez, S., Aury, J.-M., Duvic, B., et al. (2017). Two genomes of highly polyphagous lepidopteran pests (Spodoptera frugiperda, Noctuidae) with different host-plant ranges. Scientific Reports, 7: 11816. doi:10.1038/s41598-017-10461-4.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002E-0466-3
Abstract
Emergence of polyphagous herbivorous insects entails significant adaptation to recognize, detoxify and digest a variety of host-plants. Despite of its biological and practical importance - since insects eat 20% of crops - no exhaustive analysis of gene repertoires required for adaptations in generalist insect herbivores has previously been performed. The noctuid moth Spodoptera frugiperda ranks as one of the world’s worst agricultural pests. This insect is polyphagous while the majority of other lepidopteran herbivores are specialist. It consists of two morphologically indistinguishable strains (“C” and “R”) that have different host plant ranges. To describe the evolutionary mechanisms that both enable the emergence of polyphagous herbivory and lead to the shift in the host preference, we analyzed whole genome sequences from laboratory and natural populations of both strains. We observed huge expansions of genes associated with chemosensation and detoxification compared with specialist Lepidoptera. These expansions are largely due to tandem duplication, a possible adaptation mechanism enabling polyphagy. Individuals from natural C and R populations show significant genomic differentiation. We found signatures of positive selection in genes involved in chemoreception, detoxification and digestion, and copy number variation in the two latter gene families, suggesting an adaptive role for structural variation.