Figure 5

Example Scheme code that implements the demographic scenario of Figure 4. The Scheme code specifies both the population structures and the migration rates between populations, and simulates a sample of 100 individuals from population P₁ and 50 from each of populations P₃ and P₄, with the merging of populations P₃ and P₄ into p₂ at time 1.5 and the merging of populations P₁ and P₂ at time 3. The merge of P₁ and P₂ is followed by a bottleneck followed by a period of constant population size of f*2N = 10N.