Duplication of acetylcholinesterase gene in diamondback moth strains with different sensitivities to acephate

Shoji Sonoda, Xueyan Shi, Dunlun Song, Pei Liang, Xiwu Gao, Youjun Zhang, Jianhong Li, Yong Liu, Ming Li, Masaya Matsumura, Sachiyo Sanada-Morimura, Chieka Minakuchi, Toshiharu Tanaka, Tadashi Miyata

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)


    This study examined the acetylcholinesterase 1 gene (AChE1) in Plutella xylostella strains with different sensitivities to acephate. Multiple haplotypes of the gene were found in the field-collected strains including distinct haplotypes carrying one or both previously reported mutations (A298S and G324A). Moreover, sequencing results indicated the presence of duplicated copies of the gene in the field-collected strains. No correlation was found between copy numbers of AChE1 and levels of resistance to acephate suggesting that extensive AChE1 duplication is not a major resistance factor at least in some P.xylostella strains. Proportions of the A298S and G324A mutations showed no correlation with levels of resistance to acephate. This suggests that acephate resistance of P.xylostella is complex and cannot be evaluated based on the AChE1 copy number or proportions of the resistance mutations alone.

    Original languageEnglish
    Pages (from-to)83-90
    Number of pages8
    JournalInsect Biochemistry and Molecular Biology
    Issue number1
    Publication statusPublished - May 2014


    • Acetylcholinesterase
    • Diamondback moth
    • Gene duplication
    • Mutation
    • Organophosphate

    ASJC Scopus subject areas

    • Biochemistry
    • Molecular Biology
    • Insect Science


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