GibsonJME19.pdf (974.69 kB)
Investigating evolutionary rate variation in bacteria
journal contribution
posted on 2023-06-09, 19:15 authored by Bethany Gibson, Adam Eyre-WalkerAdam Eyre-WalkerRates of molecular evolution are known to vary between species and across all kingdoms of life. Here, we explore variation in the rate at which bacteria accumulate mutations (accumulation rates) in their natural environments over short periods of time. We have compiled estimates of the accumulation rate for over 34 species of bacteria, the majority of which are pathogens evolving either within an individual host or during outbreaks. Across species, we find that accumulation rates vary by over 3700-fold. We investigate whether accumulation rates are associated to a number potential correlates including genome size, GC content, measures of the natural selection and the time frame over which the accumulation rates were estimated. After controlling for phylogenetic non-independence, we find that the accumulation rate is not significantly correlated to any factor. Furthermore, contrary to previous results, we find that it is not impacted by the time frame of which the estimate was made. However, our study, with only 34 species, is likely to lack power to detect anything but large effects. We suggest that much of the rate variation may be explained by differences between species in the generation time in the wild.
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Publication status
- Published
File Version
- Published version
Journal
Journal of Molecular EvolutionISSN
0022-2844Publisher
SpringerExternal DOI
Department affiliated with
- Evolution, Behaviour and Environment Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-10-07First Open Access (FOA) Date
2019-10-07First Compliant Deposit (FCD) Date
2019-10-04Usage metrics
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