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Infectious parthenogenesis.

M E Huigens1, R F Luck, R H Klaassen

  • 1Department of Plant Sciences Wageningen University, The Netherlands.

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Summary
This summary is machine-generated.

Parthenogenesis-inducing Wolbachia bacteria, transmitted vertically, can also spread horizontally between wasp larvae. This unexpected transfer impacts Wolbachia-host co-evolution.

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Area of Science:

  • Microbiology
  • Evolutionary Biology
  • Entomology

Background:

  • Wolbachia are reproductive parasites in insects, inducing parthenogenesis in infected females.
  • Vertical transmission (mother-to-offspring) is the primary known route for Wolbachia spread.
  • Males are considered dead ends for vertical transmission of these bacteria.

Purpose of the Study:

  • To investigate alternative transmission routes for parthenogenesis-inducing Wolbachia.
  • To determine the frequency and significance of horizontal Wolbachia transfer.
  • To understand the implications for Wolbachia-host co-evolution.

Main Methods:

  • Observational studies on wasp larvae sharing common food sources.
  • Microscopic and genetic analyses to detect Wolbachia presence and transfer.
  • Tracking the vertical transmission of horizontally acquired Wolbachia.

Main Results:

  • Frequent horizontal transmission of Wolbachia between uninfected and infected wasp larvae was observed.
  • Horizontal transfer occurred via shared larval food sources.
  • Transferred Wolbachia were successfully passed on to subsequent generations vertically.

Conclusions:

  • Horizontal transmission is a significant and natural route for Wolbachia spread within wasp populations.
  • This finding challenges the exclusive focus on vertical transmission.
  • The frequent horizontal transfer has crucial implications for the co-evolutionary dynamics between Wolbachia and their hosts.