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Grant C, Singh KS, Hayward A, Hunt BJ, Troczka BJ, Pym A, Ahn SJ, Zeng B, Gao CF, Leroux A, Daum E, Süess P, Souza D, Elias J, Ffrench-Constant RH, Vontas J, Roditakis E, Bielza P, Zimmer CT, Bass C. Overexpression of the UDP-glycosyltransferase UGT34A23 confers resistance to the diamide insecticide chlorantraniliprole in the tomato leafminer, Tuta absoluta. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2023; 159:103983. [PMID: 37380137 DOI: 10.1016/j.ibmb.2023.103983] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 06/19/2023] [Accepted: 06/25/2023] [Indexed: 06/30/2023]
Abstract
The tomato leafminer, Tuta absoluta, is an invasive crop pest that has evolved resistance to many of the insecticides used for its control. To facilitate the investigation of the underpinning mechanisms of resistance in this species we generated a contiguous genome assembly using long-read sequencing data. We leveraged this genomic resource to investigate the genetic basis of resistance to the diamide insecticide chlorantraniliprole in Spanish strains of T. absoluta that exhibit high levels of resistance to this insecticide. Transcriptomic analyses revealed that, in these strains, resistance is not associated with previously reported target-site mutations in the diamide target-site, the ryanodine receptor, but rather is associated with the marked overexpression (20- to >100-fold) of a gene encoding a UDP-glycosyltransferase (UGT). Functional expression of this UGT, UGT34A23, via ectopic expression in Drosophila melanogaster demonstrated that it confers strong and significant resistance in vivo. The genomic resources generated in this study provide a powerful resource for further research on T. absoluta. Our findings on the mechanisms underpinning resistance to chlorantraniliprole will inform the development of sustainable management strategies for this important pest.
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Affiliation(s)
- Charles Grant
- Centre for Ecology and Conservation, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Kumar Saurabh Singh
- Centre for Ecology and Conservation, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Angela Hayward
- Centre for Ecology and Conservation, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Benjamin J Hunt
- Centre for Ecology and Conservation, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Bartlomiej J Troczka
- Centre for Ecology and Conservation, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Adam Pym
- Centre for Ecology and Conservation, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - Seung-Joon Ahn
- Department of Biochemistry, Molecular Biology, Entomology and Plant Pathology, Mississippi State University, Starkville, MS, United States
| | - Bin Zeng
- Centre for Ecology and Conservation, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK; College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Jiangsu, China
| | - Cong-Fen Gao
- College of Plant Protection, Nanjing Agricultural University, Nanjing, 210095, China; State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Jiangsu, China
| | - Alicia Leroux
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein, CH4332, Switzerland
| | - Eve Daum
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein, CH4332, Switzerland
| | - Philip Süess
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein, CH4332, Switzerland; Department of Zoology, Stockholm University, 11418, Stockholm, Sweden
| | - Dariane Souza
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein, CH4332, Switzerland
| | - Jan Elias
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein, CH4332, Switzerland
| | - Richard H Ffrench-Constant
- Centre for Ecology and Conservation, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK
| | - John Vontas
- Institute of Molecular Biology & Biotechnology, Foundation for Research & Technology Hellas, Crete, Greece; Department of Crop Science, Agricultural University of Athens, Athens, Greece
| | - Emmanouil Roditakis
- Department of Agriculture, Hellenic Mediterranean University, Heraklion, Crete, Greece
| | - Pablo Bielza
- Departamento de Producción Vegetal, Universidad Politécnica de Cartagena, Paseo Alfonso XIII 48, 30203, Spain
| | - Christoph T Zimmer
- Syngenta Crop Protection, Werk Stein, Schaffhauserstrasse, Stein, CH4332, Switzerland.
| | - Chris Bass
- Centre for Ecology and Conservation, Biosciences, University of Exeter, Penryn Campus, Penryn, Cornwall, UK.
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Lewald KM, Song W, Eweis-LaBolle D, Truong C, Godfrey KE, Chiu JC. Probe-based quantitative PCR and RPA-Cas12a molecular diagnostics for detection of the tomato pest Phthorimaea absoluta (Lepidoptera: Gelechiidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2023:7161379. [PMID: 37177893 DOI: 10.1093/jee/toad079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 03/14/2023] [Accepted: 04/22/2023] [Indexed: 05/15/2023]
Abstract
The tomato pest Phthorimaea absoluta Meyrick is highly invasive but has not yet invaded North America. However, several morphologically similar species are already present, making detection of P. absoluta presence and invasion challenging. We designed a quantitative PCR molecular diagnostic to differentiate P. absoluta, P. operculella (Zeller), or Keiferia lycopersicella (Walsingham) (Lepidoptera: Gelechiidae) DNA. Additionally, we developed an RPA-Cas12a molecular diagnostic that allows for the isothermal detection of P. absoluta DNA, eliminating the need for a thermocycler. The results of the RPA-Cas12a diagnostic can be visualized simply using a UV light source and cell phone camera. We expect these diagnostics to improve quarantine and prevention measures against this serious agricultural threat.
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Affiliation(s)
- Kyle M Lewald
- Department of Entomology and Nematology, College of Agricultural and Environmental Sciences, University of California Davis, One Shields Ave, Davis, CA 95616, USA
| | - Wenqi Song
- Department of Entomology and Nematology, College of Agricultural and Environmental Sciences, University of California Davis, One Shields Ave, Davis, CA 95616, USA
| | - Daniel Eweis-LaBolle
- Department of Entomology and Nematology, College of Agricultural and Environmental Sciences, University of California Davis, One Shields Ave, Davis, CA 95616, USA
| | - Cindy Truong
- Department of Entomology and Nematology, College of Agricultural and Environmental Sciences, University of California Davis, One Shields Ave, Davis, CA 95616, USA
| | - Kristine E Godfrey
- Contained Research Facility, University of California, Davis, 555 Hopkins Rd, Davis, CA 95616, USA
| | - Joanna C Chiu
- Department of Entomology and Nematology, College of Agricultural and Environmental Sciences, University of California Davis, One Shields Ave, Davis, CA 95616, USA
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