Fig. 1

Genetic divergence and the divergent time among Acanthus ilicifolius, A. leucostachyus and Avicennia marina. a Synonymous substitution rates (Ks) distribution of the orthologs between each pair of Acanthus ilicifolius, A. leucostachyus and Av. marina. The numbers in parentheses after the species name indicate the number of orthologs used for Ks distribution plotting. b Divergent time of A. ilicifolius, A. leucostachyus and Av. marina, as well as the two outgroups Sesamum indicum and Mimulus guttatus. The scale bar is 10 million years. The value and purple bar at each node indicate the estimated divergent time (million years) with a 95 % credibility interval