期刊
NATURE REVIEWS MICROBIOLOGY
卷 12, 期 12, 页码 841-850出版社
NATURE PORTFOLIO
DOI: 10.1038/nrmicro3331
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- French Research Ministry
- Centre National de la Recherche Scientifique
- French National Research Agency [ANR-10-BINF-01-01]
Bacterial genomes show substantial variations in size. The smallest bacterial genomes are those of endocellular symbionts of eukaryotic hosts, which have undergone massive genome reduction and show patterns that are consistent with the degenerative processes that are predicted to occur in species with small effective population sizes. However, similar genome reduction is found in some free-living marine cyanobacteria that are characterized by extremely large populations. In this Opinion article, we discuss the different hypotheses that have been proposed to account for this reductive genome evolution at both ends of the bacterial population size spectrum.
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