Fixation probabilities in graph-structured populations under weak selection
Fig 12
(A) This bowtie-shaped graph is the smallest absolute amplifier of weak selection under temperature initialization. (B) The difference in fixation probabilities between this graph and the complete graph K6 is plotted against mutant fitness, r. The dashed line shows the linear approximation to this difference at r = 1, computed using our weak-selection methods. Although this difference is increasing at r = 1 (because the graph is an absolute amplifier of weak selection), the difference is negative for all values of r. Thus this graph does not amplify selection in the usual sense of for all r > 1.