Increase in competitive fitness of offspring relative to the ancestor after >25 years & >50,000 generations

Range >70 %
Organism Bacteria Escherichia coli
Reference Raeside C, et al., Large chromosomal rearrangements during a long-term evolution experiment with Escherichia coli. MBio. 2014 Sep 95(5):e01377-14. doi: 10.1128/mBio.01377-14. p.2 right column 2nd paragraphPubMed ID25205090
Primary Source Wiser MJ, Ribeck N, Lenski RE . 2013. Long-term dynamics of adaptation in asexual populations. Science 342: 1364–1367. doi:10.1126/science.1243357.PubMed ID24231808
Method "[Investigators] produced optical chromosomal maps for clones isolated from a long-term evolution experiment (LTEE) with E. coli. In this ongoing experiment, 12 populations have been independently propagated from a common ancestor in the same glucose-limited minimal medium for more than 25 years and 50,000 cell generations. These evolving populations have adapted to the experimental environment and have increased in competitive fitness relative to the ancestor by more than 70%, on average (primary source)."
Entered by Uri M
ID 111498