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Related Experiment Videos

Wolbachia in two insect host-parasitoid communities

S A West1, J M Cook, J H Werren

  • 1Department of Biology, Imperial College at Silwood Park, Ascot, Berkshire, UK. Stu.West@ed.ac.uk

Molecular Ecology
|November 20, 1998
PubMed
Summary

Wolbachia bacteria infect 22% of insects studied. Host-parasitoid transfer is unlikely the main infection route, with varied Wolbachia (A or B groups) prevalence across insect groups.

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Area of Science:

  • Microbiology
  • Entomology
  • Evolutionary Biology

Background:

  • Wolbachia are intracellular bacteria known to manipulate arthropod reproduction.
  • Two main phylogenetic groups, A and B, are recognized within Wolbachia.
  • Understanding Wolbachia transmission is crucial for host-parasitoid community dynamics.

Purpose of the Study:

  • To survey the prevalence and types of Wolbachia infections in insect species from temperate host-parasitoid communities.
  • To investigate potential transmission routes, including host-parasitoid transfer and shared ecological niches.
  • To analyze the phylogenetic relationships of Wolbachia strains within specific insect groups.

Main Methods:

  • Polymerase chain reaction (PCR) assay used to detect A and B group Wolbachia.

Related Experiment Videos

  • Survey conducted on 82 insect species from two distinct host-parasitoid communities and a general Lepidoptera collection.
  • DNA sequencing of the ftsZ gene for phylogenetic analysis of Group B Wolbachia.

    • Main Results:

    • 22.0% of sampled insects were infected with Wolbachia.
    • Wolbachia prevalence and type (A or B) significantly varied between communities and taxonomic groups.
    • Phylogenetic analysis of ftsZ gene sequences suggested limited host-parasitoid transfer and no evidence of transmission via shared feeding niches or cospeciation.

    Conclusions:

    • Host-parasitoid transfer is not the primary mechanism for Wolbachia infection in the studied insect species.
    • Wolbachia strains within closely related insect species, even those sharing a niche, were not closely related, refuting cospeciation or shared niche transmission.
    • The findings highlight complex Wolbachia infection dynamics independent of direct host-parasitoid interactions or shared ecological factors.