The Maternal Effect Gene Wds Controls Wolbachia Titer in Nasonia

Lisa J. Funkhouser-Jones, Edward J. van Opstal, Ananya Sharma, Seth R. Bordenstein

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

Maternal transmission of intracellular microbes is pivotal in establishing long-term, intimate symbioses. For germline microbes that exert negative reproductive effects on their hosts, selection can theoretically favor the spread of host genes that counteract the microbe's harmful effects. Here, we leverage a major difference in bacterial (Wolbachia pipientis) titers between closely related wasp species with forward genetic, transcriptomic, and cytological approaches to map two quantitative trait loci that suppress bacterial titers via a maternal effect. Fine mapping and knockdown experiments identify the gene Wolbachia density suppressor (Wds), which dominantly suppresses bacterial transmission from mother to embryo. Wds evolved by lineage-specific non-synonymous changes driven by positive selection. Collectively, our findings demonstrate that a genetically simple change arose by positive Darwinian selection in less than a million years to regulate maternally transmitted bacteria via a dominant, maternal effect gene. Funkhouser-Jones et al. use several forward genetic techniques to map two quantitative trait loci in the N. vitripennis genome, and they identify the taxon-restricted gene Wds, which strongly suppresses maternal transmission of Wolbachia to developing oocytes through a maternal genetic effect. The N. vitripennis Wds sequence evolved by positive Darwinian selection.

Original languageEnglish (US)
Pages (from-to)1692-1702.e6
JournalCurrent Biology
Volume28
Issue number11
DOIs
StatePublished - Jun 4 2018

All Science Journal Classification (ASJC) codes

  • General Biochemistry, Genetics and Molecular Biology
  • General Agricultural and Biological Sciences

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