Mean recombination rate (cM/Mb) in distal (<15 Mb from chromosome end) and central parts (>15 Mb from chromosome end) of chromosomes larger than 50 Mb in four vertebrates with available high-density linkage map and draft genome sequence

[i] ***, Significantly different at P < 0.001 from the zebra finch rate of the same region (Wilcoxon test).