Fig. 3: WGDs and ancestral chromosome reconstruction in Sphagnum.

a, Interchromosomal synteny between S. divinum and S. angustifolium. S. divinum chromosomes are re-ordered to group paralogous chromosomes together while S. angustifolium chromosomes are arranged in increasing order (1–20). Ancestral B–D synteny on chr. 3, 13 and 14 is highlighted. b, Synonymous mutation rate among paralogous gene pairs in S. divinum. Two distributions derived from WGD are shown with the median of each peak (0.406; 0.643) marked with a coloured vertical line. c, Paralogous gene pairs among chr. 7 and chr. 20. Chr. 20 shares best-hit synteny with chr. 7. d, Ancestral chromosome reconstruction in Sphagnum. Little interchromosomal rearrangement has occurred after each WGD, except for the loss of one of the ancestral E chromosome homologues (noted with a red X). Genome duplication ages from ref. 38.