The DOI matches its Crossref record; 40 of the 40 references it cites were found in a registry or an index.
The dynamics of molecular evolution over 60,000 generations
Open accessAbstract
The outcomes of evolution are determined by a stochastic dynamical process that governs how mutations arise and spread through a population. However, it is difficult to observe these dynamics directly over long periods and across entire genomes. Here we analyse the dynamics of molecular evolution in twelve experimental populations of Escherichia coli, using whole-genome metagenomic sequencing at five hundred-generation intervals through sixty thousand generations. Although the rate of fitness gain declines over time, molecular evolution is characterized by signatures of rapid adaptation throughout the duration of the experiment, with multiple beneficial variants simultaneously competing for dominance in each population. Interactions between ecological and evolutionary processes play an important role, as long-term quasi-stable coexistence arises spontaneously in most populations, and evolution continues within each clade. We also present evidence that the targets of natural selection change over time, as epistasis and historical contingency alter the strength of selection on different genes. Together, these results show that long-term adaptation to a constant environment can be a more complex and dynamic process than is often assumed.
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Horizontal gene transfer and adaptive evolution in bacteria.
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Self-citationAdaptive Evolution within Gut Microbiomes of Healthy People
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Metadata
- Authors
- Good, B. H., McDonald, M. J., Barrick, J. E., Lenski, R. E., & Desai, M. M.
- Venue
- Nature
- Published
- 2017-10-18
- Volume
- 551
- Issue
- 7678
- Pages
- 45-50
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2765922336
- Cited by
- 730
- References
- 40
- FWCI
- 35.84
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Good, B. H., McDonald, M. J., Barrick, J. E., Lenski, R. E., & Desai, M. M. (2017). The dynamics of molecular evolution over 60,000 generations. Nature. https://doi.org/10.1038/nature24287
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