The Maternal Effect Gene Wds Controls Wolbachia Titer in Nasonia.
The Maternal Effect Gene Wds Controls Wolbachia Titer in Nasonia.
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DOI:
10.1016/j.cub.2018.04.010
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发表时间:
2018-06-04
期刊:
影响因子:
--
通讯作者:
Bordenstein SR
中科院分区:
文献类型:
--
作者:
Funkhouser-Jones LJ;van Opstal EJ;Sharma A;Bordenstein SR
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 Darwinian selection in less than a million years to regulate maternally transmitted bacteria via a dominant, maternal effect gene. Funkhouser-Jones and van Opstal et al. use several forward genetic techniques to map two quantitative trait loci in the N. vitripennis genome and identify the gene Wds, which strongly suppresses maternal transmission of Wolbachia to developing oocytes through a maternal genetic effect. The N. vitripennis Wds sequence evolved by Darwinian selection.
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