Figure 2

Scatter plots of the squared correlation coefficient of allele frequencies (r2) as a function of distance in base pairs between pairs of polymorphic sites in western (a), southern (b) and eastern (c) groups at all loci combined. Decline in linkage disequilibrium is shown by non-linear fitting curve of the mutation-recombination-drift model (see Material and methods section for details). Recombination rate parameter ρ (standard error in parenthesis) for western group is ρ=0.0074 (0.0008), for southern group is ρ=0.0025 (0.0004) and ρ=0.0024 (0.0006) for the east.