Fig. 2

Evolution of the wintersweet genome and gene families. a Phylogenetic tree of 17 plant species. The blue numbers denote divergence time of each node (MYA, million years ago), and those in brackets are 95% confidence intervals for the time of divergence between different clades. The red numbers on the branch represent bootstrap value. The pie diagram on each branch of the tree represents the proportion of gene families undergoing gain (red) or loss (green) events. The numbers below the pie diagram denote the total number of expansion and contraction gene families. Basal angiosperm (Ba). b The distribution of single-copy, multiple-copy, unique, and other orthologs in the 17 plant species. c Venn diagram represents the shared and unique gene families among five closely related magnoliids (C. praecox, C. kanehirae, L. chinense, P. nigrum, and C. chinensis). Each number represents the number of gene families