Fig. 6

FROH coefficients (left) and distribution of ROH classes (right). All the populations analysed show a high FROH suggesting a large genome-wide homozygosity resulting from inbreeding. The lower and upper hinges correspond to the 25th and 75th percentiles. Lower and upper whiskers give a roughly 95% confidence interval around the median represented as a horizontal bold line. Pairwise t-test (with Bonferroni correction) reported no significant divergence between means (for summary statistics see supplementary Table S3). ROH graphs suggest the occurrence of a high percentage of short ROH (length < 2 Mb) in all populations, but also the presence of a significant fraction of ROHs > 4Mbp in length can be observed, indicating that most ROHs are the result of recent inbreeding events. Individual inbreeding coefficients are reported in Supplementary Table S2