Prokaryote genome fluidity is dependent on effective population size

Andreani, Nadia and Hesse, Elze and Vos, Michiel (2017) Prokaryote genome fluidity is dependent on effective population size. The ISME Journal (11). pp. 1719-1721. ISSN 1751-7362

Full content URL: https://doi.org/10.1038/ismej.2017.36

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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 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.

Keywords:accessory genome, genome fluidity, gene content turnover, gene repertoire, genome evolution, meta-analysis
Subjects:C Biological Sciences > C182 Evolution
C Biological Sciences > C500 Microbiology
Divisions:College of Science > School of Life Sciences
ID Code:27502
Deposited On:19 May 2017 08:52

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