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Spinetoram resistance in Tuta absoluta: selection, inheritance, biochemical mechanism and fitness cost

文献类型： 外文期刊

作者： Xie, Jingang 1 ; Turak, Rukiya 1 ; Liu, Ning 2 ; Zhuang, Ziyan 1 ; Liu, Xiaoning 1 ; Song, Yu 2 ;

作者机构： 1.Xinjiang Univ, Coll Life Sci & Technol, Xinjiang Key Lab Biol Resources & Genet Engn, Urumqi 830017, Peoples R China

2.Xinjiang Acad Agr Sci, Inst Crop Variety Resources, Urumqi 830091, Xinjiang, Peoples R China

关键词： Tuta absoluta; Spinetoram; Resistance genetics; Resistant mechanism; Fitness costs

期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：4.0； 五年影响因子：4.5 ）

ISSN： 0048-3575

年卷期： 2025 年 215 卷

页码：

收录情况： SCI

摘要： Bioinsecticides are commonly used to control Tuta absoluta, which predominantly feeds on tomatoes. However, excessive use of insecticides typically leads to resistance. Understanding the causes of resistance, inheritance patterns, and related fitness costs may assist in the regulation of resistance. A spinetoram-resistant strain (SPI-R) of T. absoluta was obtained by selective insecticide breeding for 20 generations (410.86-fold). Genetic analysis revealed that the resistance was polygenic, autosomal, and incompletely recessive with high heritability (h2 = 0.36). Increased activity of three detoxification metabolic enzymes(cytochrome P450 monooxygenases, glutathione S-transferases, and carboxylesterase) played a primary role in resistance according to the synergist assay. SPI-R also exhibited fitness costs including extended larval stages and reduced adult longevity. These results provide useful insights for formulating practical recommendations for the effective use of spinetoram to control insecticide resistance in T. absoluta.

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