Correlation based on simulations (

replicates) of the statistic

of the true tree. Pearson's correlation coefficient is measured between

and

for pairs of trees at position

and position

. Three scenarios are compared: standard neutral model with constant population size (green), population bottleneck (blue) and selective sweep (red). Sample size

,

,

and a recombinaton rate of

is assumed. The bottleneck parameters are:

,

. The selective sweep has a strength of

. The selected site is at position

. Under standard neutrality,

correlation is reached at position

cM, corresponding to about

bp.