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Related Experiment Video

Updated: May 22, 2026

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles
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Wolbachia and DNA barcoding insects: patterns, potential, and problems.

M Alex Smith1, Claudia Bertrand, Kate Crosby

  • 1Department of Integrative Biology and the Biodiversity, Institute of Ontario, University of Guelph, Guelph, Ontario, Canada. salex@uoguelph.ca

Plos One
|May 9, 2012
PubMed
Summary
This summary is machine-generated.

Wolbachia bacteria DNA is often detected in insect DNA barcoding samples. However, Wolbachia DNA does not interfere with accurate insect identification, offering a benefit for detecting these endosymbionts.

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Area of Science:

  • Microbiology
  • Genomics
  • Entomology

Background:

  • Wolbachia are bacterial endosymbionts affecting host reproduction and mitochondrial DNA patterns.
  • Mitochondrial DNA variation, including DNA barcodes, can be influenced by Wolbachia, potentially complicating host identification.

Purpose of the Study:

  • To determine the prevalence of Wolbachia in insect DNA barcoding libraries.
  • To assess the impact of Wolbachia DNA on insect sequence divergence and identification accuracy.
  • To analyze the genetic variation within Wolbachia's cytochrome c oxidase I (COI) gene.

Main Methods:

  • Standard PCR assays targeting Wolbachia surface protein (wsp) and bacterial COI fragments.
  • Analysis of over 2 million insect COI sequence files from the Barcode of Life Datasystem (BOLD).
  • Examination of Wolbachia COI amplicons generated using standard insect barcoding primers.

Main Results:

  • Wolbachia DNA was detected in insect genomic extracts used for DNA barcoding library construction.
  • Wolbachia COI sequences were found in 0.16% of over 2 million insect COI trace files on BOLD.
  • Generated Wolbachia COI amplicons using insect primers were distinguishable from host COI sequences.
  • Recovered Wolbachia alleles belonged predominantly to Supergroup A and showed broad geographic and phylogenetic distribution.

Conclusions:

  • The presence of Wolbachia DNA in insect genomic extracts is unlikely to compromise DNA barcode library accuracy.
  • Detecting endosymbionts like Wolbachia is an ancillary benefit of large-scale DNA barcoding initiatives.
  • Regular assays for Wolbachia presence and type should be integrated into large-scale insect barcoding efforts.
  • Limited overlap exists between the COI gene used for Wolbachia multi-locus sequence typing and the eukaryotic DNA barcode region.