Strain composition changed over time. The frequencies of each strain in twelve populations after one and after ten social generations at high and low relatedness. The eight strains are represented by different colors (QS45 navy blue, QS49 red, QS35 yellow, QS125 dark green, QS135 light blue, QS14 maroon, QS95 white, QS136 light green). Each pie diagram represents a population.
Saxer et al. BMC Evolutionary Biology 2010 10:76 doi:10.1186/1471-2148-10-76