• Second-order selection for evolvability in a large Escherichia coli population 

    Woods, Robert J.; Barrick, Jeffrey E.; Cooper, Tim F.; Shrestha, Utpala; Kauth, Mark R.; Lenski, Richard E. (Science, 2011-09-28)
    In theory, competition between asexual lineages can lead to second-order selection for greater evolutionary potential. To test this hypothesis, we revived a frozen population of Escherichia coli from a long-term evolution ...