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Related Experiment Video

Updated: May 13, 2025

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A self-limiting sterile insect technique alternative for Ceratitis capitata.

Serafima Davydova1, Junru Liu2, Yiran Liu3

  • 1Department of Life Sciences, Imperial College London, London, SW7 2 AZ, UK.

BMC Biology
|April 12, 2025
PubMed
Summary

Researchers developed a novel split-CRISPR/Cas9 system for the Mediterranean fruit fly. This Sex Conversion Induced by CRISPR (SCIC) system shows potential for more effective genetic pest control than traditional methods.

Keywords:
TransformerAgricultural pestsCRISPR/Cas9MedflySITSex conversionTephritid

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Area of Science:

  • Genetics
  • Molecular Biology
  • Entomology

Background:

  • Genetic biocontrol offers promising solutions for managing insect populations that spread disease and impact agriculture.
  • The Mediterranean fruit fly (Ceratitis capitata) is a significant global agricultural pest, making it a prime candidate for genetic control strategies.

Purpose of the Study:

  • To develop and characterize a novel split-CRISPR/Cas9 system for genetic control in Ceratitis capitata.
  • To assess the efficiency of this system in inducing sex conversion and its potential for population suppression.

Main Methods:

  • Established a split-CRISPR/Cas9 system, termed Sex Conversion Induced by CRISPR (SCIC), in C. capitata.
  • Utilized the white eye gene for toolkit selection, achieving up to 100% CRISPR/Cas9 efficiency.
  • Targeted the transformer gene to induce female-to-male sex conversion in C. capitata.

Main Results:

  • Demonstrated the feasibility of split-CRISPR/Cas9 systems in C. capitata using constitutive promoters.
  • Achieved partial to full female-to-male sex conversion, with intersexuality and sterility observed in remaining individuals.
  • Population modeling indicated that SCIC could outperform traditional sterile insect technique (SIT) for faster population elimination with fewer sterile males.

Conclusions:

  • Successfully constructed a functional CRISPR/Cas9 toolkit for C. capitata.
  • The developed SCIC system provides a foundation for advanced genetic pest control in C. capitata and related tephritid pests.
  • This research paves the way for more efficient and targeted approaches to agricultural pest management.