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  • Title: Integration analysis of PacBio SMRT- and Illumina RNA-seq reveals P450 genes involved in thiamethoxam detoxification in Bradysia odoriphaga.
    Author: Chen C, Wang C, Liu Y, Shan T, Shi X, Gao X.
    Journal: Pestic Biochem Physiol; 2022 Aug; 186():105176. PubMed ID: 35973766.
    Abstract:
    The sciarid fly Bradysia odoriphaga is a serious pest of Chinese chive (Liliaceae). Neonicotinoid insecticides including thiamethoxam have been used for B. odoriphaga control. However, thiamethoxam resistance in B. odoriphaga has developed in recent years. To identify potential genes involved in detoxification metabolism of thiamethoxam in B. odoriphaga, a PacBio single-molecule real-time (SMRT) transcriptome sequencing and Illumina RNA-seq analysis on thiamethoxam treated B. odoriphaga were performed to explore differentially expressed genes in B. odoriphaga. After SMRT sequencing, analysis of Illumina RNA-Seq data showed a total of 172 differentially expressed genes (DEGs) after thiamethoxam treatment, among which eight upregulated DEGs were P450 genes that may be related to thiamethoxam metabolism. The qRT-PCR results of the eight up-regulated P450 unigenes after thiamethoxam treatment were consistent with RNA-Seq data. Furthermore, oral delivery mediated RNA interference of the eight upregulated P450 transcripts followed by insecticide bioassay was conducted, and three P450 unigenes were verified to be related to thiamethoxam detoxification in B. odoriphaga. This study provides new information about the P450 genes involved in thiamethoxam detoxification in B. odoriphaga.
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