Estimate of the genomic mutation rate deleterious to overall fitness in E. coli.

Abstract excerpt

Mutations are a double-edged sword: they are the ultimate source of genetic variation upon which evolution depends, yet most mutations affecting fitness (viability and reproductive success) appear to be harmful. Deleterious mutations of small effect can escape natural selection, and should accumulate in small population. Reduced fitness from deleterious-mutation accumulation may be important in the evolution of...

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