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Pest management science v.74 no.8, 2018년, pp.1769 - 1778  

F2 screen, inheritance and cross‐resistance of field‐derived Vip3A resistance in Spodoptera frugiperda (Lepidoptera: Noctuidae) collected from Louisiana, USA

Yang, Fei (Department of Entomology, Texas A&M University, College Station, TX, USA ) ; Morsello, Shannon (Syngenta Crop Protection, LLC, Greensboro, NC, USA ) ; Head, Graham P (Monsanto Company, St. Louis, MO, USA ) ; Sansone, Chris (Bayer CropScience, Morrisville, NC, USA ) ; Huang, Fangneng (Department of Entomology, Louisiana State University Agricultural Center, Baton Rouge, LA, USA ) ; Gilreath, Ryan T (Department of Entomology, Texas A&M University, College Station, TX, USA ) ; Kerns, David L (Department of Entomology, Texas A&M University, College Station, TX, USA ) ;
  • 초록  

    Abstract BACKGROUND Fall armyworm, Spodoptera frugiperda , is a target pest of the Vip3A protein used in pyramided Bt corn and cotton in the USA. In this study, we provide the first documentation of a resistance allele conferring Vip3A resistance in a field‐derived population of S. frugiperda from the USA, and characterize its inheritance and cross‐resistance. RESULTS An F 2 screen with 104 two‐parent families generated from a field collection of S. frugiperda in Louisiana, USA, resulted in one family carrying a Vip3A resistance allele. The Vip3A‐resistant strain (RR) derived from the two‐parent family showed a high level of resistance to Vip3A in both diet and whole‐plant bioassays, with a resistance ratio of >632.0‐fold relative to a susceptible population (SS) based on diet‐overlay bioassays. The inheritance of Vip3A resistance was monogenic, autosomal and recessive. Furthermore, the Vip3A resistance conferred no cross‐resistance to Cry1F, Cry2Ab2 or Cry2Ae purified proteins, with resistance ratios of 3.5, 5.0 and 1.1, respectively. CONCLUSION These findings provide valuable information for characterizing Vip3A resistance, resistance monitoring, and developing effective resistance management strategies for the sustainable use of the Vip3A technology. ⓒ 2017 Society of Chemical Industry


  • 주제어

    Bacillus thuringiensis .   Spodoptera frugiperda .   F2 screen .   inheritance .   cross‐resistance .   resistance .   Vip3A.  

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