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Identify the genomic mechanisms enabling the polyphagous pest Spodoptera litura to consume diverse host crops and tolerate synthetic insecticides.

September 22, 2017Journal of Media Literacy EducationOpen Access

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

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Identify the genomic mechanisms enabling the polyphagous pest Spodoptera litura to consume diverse host crops and tolerate synthetic insecticides.
Performed whole-genome sequencing, physical mapping, and transcriptome analysis of the tobacco cutworm Spodoptera litura.
Assessed gene function and larval tolerance by profiling expression under pesticide exposure and testing survival after siRNA-mediated knockdown of candidate detoxification genes.
Conducted population genetics analyses to trace pest migration and ecological adaptation across a South India–South China–Japan axis.
Identified massive family expansions in bitter and toxin taste receptors as well as detoxification enzymes, specifically cytochrome P450, carboxylesterase, and glutathione-S-transferase.
Demonstrated that larval exposure to insecticides upregulates detoxification gene expression, and targeted siRNA knockdown of these genes significantly reduces larval survival.
Revealed that pest migration across diverse ecological zones in Asia was facilitated by these expanded genomic detoxification systems.

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Implication

Genomic analysis reveals massive expansion of detoxification gene families in Spodoptera litura, highlighting mechanisms enabling wide host adaptation and pesticide tolerance.

Cite This Study

Cheng et al. (2017) studied this question.

synapsesocial.com/papers/69d7c7937392c8ce61bedb1e https://doi.org/10.1038/s41559-017-0314-4

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Implication

Genomic analysis reveals massive expansion of detoxification gene families in Spodoptera litura, highlighting mechanisms enabling wide host adaptation and pesticide tolerance.

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

Key Points

Discussion

Implication

Cite This Study

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

Key Points

Discussion

Implication

Cite This Study

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