Fig. 3

Distribution of inter- and intra-species Pearson correlation coefficient distances (PCCDs). a Four selected examples with different sizes are presented. Inter- and intra-species PCCDs can be approximated by normal distributions (P-values < 2.2e-16, one-sample Kolmogorov–Smirnov test). b Mean and standard deviation (SD) of intra- and inter-species PCCD distribution. For pairwise sizes in the x axis, please refer to Additional file 3