Fig. 1

a The Venn diagram shows the number of orthologs shared among musk deer and other representative mammals. b Phylogeny and gene family size evolution. The phylogenetic tree is constructed based on four-fold degeneration sites among single-copy orthologs with the neighbor-joining method. The timelines indicate inferred divergence times among the species based on the molecular clock. The number of significantly expanded (red) and contracted (blue) gene families (branch-specific p-value < 0.01) are shown at each branch