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摘要 : 2017年9月28日,国际学术权威刊物自然出版集团旗下子刊《Nature Ecology & Evolution》杂志在线发表了西南大学家蚕基因组生物学国家重点实验室Kazuei Mita研究员等单位合作的一篇研究论文,研究成果揭示了斜纹夜蛾的高质量基因组精细图谱

2017年9月28日,国际学术权威刊物自然出版集团旗下子刊《Nature Ecology & Evolution》杂志在线发表了西南大学家蚕基因组生物学国家重点实验室Kazuei Mita研究员等单位合作的一篇研究论文,研究成果揭示了斜纹夜蛾的高质量基因组精细图谱,以及群体变异图谱和基因表达图谱,可为其防治提供科学依据。




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


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.

来源: Nature Ecology & Evolution 浏览次数:0


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