Competition between different bacteriophage Qβ virus clones. a) Qβwt and QβA1746U+U3989C. b) QβA1746U and QβA1746U+U3989C. The experiment was carried out as described in Methods. The populations obtained after the number of transfers indicated were sequenced to determine whether one of the competitor viruses had become dominant.
Cabanillas et al. BMC Evolutionary Biology 2013 13:11 doi:10.1186/1471-2148-13-11