Migration and horizontal gene transfer divide microbial genomes into multiple niches.

Details

Serval ID
serval:BIB_9D710535D87B
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Migration and horizontal gene transfer divide microbial genomes into multiple niches.
Journal
Nature Communications
Author(s)
Niehus R., Mitri S., Fletcher A.G., Foster K.R.
ISSN
2041-1723 (Electronic)
ISSN-L
2041-1723
Publication state
Published
Issued date
2015
Peer-reviewed
Oui
Volume
6
Pages
8924
Language
english
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: epublish
Abstract
Horizontal gene transfer is central to microbial evolution, because it enables genetic regions to spread horizontally through diverse communities. However, how gene transfer exerts such a strong effect is not understood. Here we develop an eco-evolutionary model and show how genetic transfer, even when rare, can transform the evolution and ecology of microbes. We recapitulate existing models, which suggest that asexual reproduction will overpower horizontal transfer and greatly limit its effects. We then show that allowing immigration completely changes these predictions. With migration, the rates and impacts of horizontal transfer are greatly increased, and transfer is most frequent for loci under positive natural selection. Our analysis explains how ecologically important loci can sweep through competing strains and species. In this way, microbial genomes can evolve to become ecologically diverse where different genomic regions encode for partially overlapping, but distinct, ecologies. Under these conditions ecological species do not exist, because genes, not species, inhabit niches.
Keywords
Bacteria/genetics, Gene Transfer, Horizontal, Genome, Bacterial, Models, Genetic
Pubmed
Web of science
Open Access
Yes
Create date
04/01/2016 11:00
Last modification date
20/08/2019 16:03
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