Prokaryote genome fluidity is dependent on effective population size
Andreani, NA; Hesse, E; Vos, M
Date: 31 March 2017
Journal
ISME Journal
Publisher
Springer Nature for International Society for Microbial Ecology
Publisher DOI
Abstract
Many prokaryote species are known to have fluid genomes, with different strains varying markedly in accessory gene content through the combined action of gene loss, gene gain via lateral transfer as well as gene duplication. However, the evolutionary forces determining genome fluidity are not yet well-understood. We here for the first ...
Many prokaryote species are known to have fluid genomes, with different strains varying markedly in accessory gene content through the combined action of gene loss, gene gain via lateral transfer as well as gene duplication. However, the evolutionary forces determining genome fluidity are not yet well-understood. We here for the first time systematically analyse the degree to which this distinctive genomic feature differs between bacterial species. We find that genome fluidity is positively correlated with synonymous nucleotide diversity of the core genome, a measure of effective population size Ne. No effects of genome size, phylogeny or homologous recombination rate on genome fluidity were found. Our findings are consistent with a scenario where accessory gene content turnover is for a large part dictated by neutral evolution
Institute of Biomedical & Clinical Science
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