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Development of a PCR-RFLP assay to identify Drosophila melanogaster among field-collected larvae

Vincent Raquin1,2, Hélène Henri1, Marine Vallat1

  • 1Université de Lyon Université Lyon 1 CNRS Laboratoire de Biométrie et Biologie Evolutive UMR 5558 Villeurbanne France.

Ecology and Evolution
|November 7, 2018
PubMed

Insights

Identifying fruit fly larvae is challenging. A new polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay accurately identifies Drosophila melanogaster larvae from field samples using the COI gene.

Area of Science:

  • * Entomology
  • * Molecular Biology
  • * Genetics

Background:

  • * *Drosophila melanogaster* is a key model organism for metazoan biology.
  • * Larval stages are increasingly important for studying physiology, development, and host-microbe interactions.
  • * Distinguishing *Drosophila* species at the larval stage is difficult using morphology alone.

Purpose of the Study:

  • * To develop a molecular tool for identifying *Drosophila melanogaster* larvae.
  • * To differentiate *D. melanogaster* from other relevant *Drosophila* species in larval stages.
  • * To enable accurate identification of field-collected larvae.

Main Methods:

  • * Development of a polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay.
  • * Targeting of the mitochondrial cytochrome oxidase I (COI) gene for species discrimination.
  • * Validation using laboratory-reared larvae and wild-collected specimens.

Main Results:

  • * The PCR-RFLP assay successfully discriminated *D. melanogaster* from six other *Drosophila* species.
  • * Validation with laboratory larvae from seven *D. melanogaster* populations confirmed assay accuracy.
  • * 100% accurate identification of *D. melanogaster* from wild larvae, confirmed by COI sequencing.

Conclusions:

  • * A rapid, simple, and accurate PCR-RFLP method is established for identifying *D. melanogaster* larvae.
  • * This tool facilitates research using field-derived *Drosophila* larvae.
  • * Enables accurate species assignment in ecological and developmental studies.
Keywords:
Drosophila melanogasterPCR‐RFLPfield samplesfruit flylarvaetaxonomic identification

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