Genomic adaptation to polyphagy and insecticides in a major East Asian noctuid pest - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement Accéder directement au contenu
Article Dans Une Revue Nature Ecology & Evolution Année : 2017

Genomic adaptation to polyphagy and insecticides in a major East Asian noctuid pest

Archana Tomar
  • Fonction : Auteur
Frederique Hilliou
  • Fonction : Auteur
  • PersonId : 1137564

Résumé

The tobacco cutworm, Spodoptera litura, is among the most widespread and destructive agricultural pests, feeding on over 100 crops throughout tropical and subtropical Asia. By genome sequencing, physical mapping and transcriptome analysis, we found that the gene families encoding receptors for bitter or toxic substances and detoxification enzymes, such as cytochrome P450, carboxylesterase and glutathione-S-transferase, were massively expanded in this polyphagous species, enabling its extraordinary ability to detect and detoxify many plant secondary compounds. Larval exposure to insecticidal toxins induced expression of detoxification genes, and knockdown of representative genes using short interfering RNA (siRNA) reduced larval survival, consistent with their contribution to the insect's natural pesticide tolerance. A population genetics study indicated that this species expanded throughout southeast Asia by migrating along a South India-South China-Japan axis, adapting to wide-ranging ecological conditions with diverse host plants and insecticides, surviving and adapting with the aid of its expanded detoxification systems. The findings of this study will enable the development of new pest management strategies for the control of major agricultural pests such as S.litura.
Fichier principal
Vignette du fichier
2017_Cheng_Nature Ecology and Evolution_1.pdf (2.78 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01837307 , version 1 (27-05-2020)

Licence

Paternité

Identifiants

Citer

Tingcai Cheng, Jiaqi Wu, Yuqian Wu, Rajendra V. Chilukuri, Lihua Huang, et al.. Genomic adaptation to polyphagy and insecticides in a major East Asian noctuid pest. Nature Ecology & Evolution, 2017, 1 (11), pp.1747-1756. ⟨10.1038/s41559-017-0314-4⟩. ⟨hal-01837307⟩
174 Consultations
113 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More