Data from: Epistasis and allele specificity in the emergence of a stable polymorphism in Escherichia coli

Jessica Plucain, Thomas Hindré, Mickaël Le Gac, Olivier Tenaillon, Stéphane Cruveiller, Claudine Médigue, Nicholas Leiby, William R. Harcombe, Christopher J. Marx, Richard E. Lenski & Dominique Schneider
Ecological opportunities promote population divergence into coexisting lineages. However, the genetic mechanisms that enable new lineages to exploit these opportunities are poorly understood except in cases of single mutations. We examined how two Escherichia coli lineages diverged from their common ancestor at the outset of a long-term coexistence. By sequencing genomes and reconstructing the genetic history of one lineage, we showed that three mutations together were sufficient to produce the frequency-dependent fitness effects that allowed...
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