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Competition Between High and Low Mutating Strains of Escherichia coli
Lin Chao and Edward C. Cox
Vol. 37, No. 1 (Jan., 1983), pp. 125-134
Published by: Society for the Study of Evolution
Stable URL: http://www.jstor.org/stable/2408181
Page Count: 10
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Previous studies (Gibson et al., 1970; Nestmann and Hill, 1973, Cox and Gibson, 1974) have shown that strains of E. coli with high mutation rates have a marked advantage in competition with wild-type strains. Those studies, however, failed to discriminate between the hypotheses that the mutator bacteria acquired an advantage by evolving faster, on the one hand, or that they had an intrinsic competitive advantage, on the other Our present investigation supports the first hypothesis. We also present estimates for the mutational load in E. coli mutT strains and the mutation rate to higher fitness mutants in these experiments.
Evolution © 1983 Society for the Study of Evolution