Fig. 3

Characterization of H. tibetana genome evolution and gene family expansion. a Distribution of gene numbers and family sizes in H. tibetana and 10 other representative species. b Venn diagram showing unique and shared gene families between genomes of H. tibetana and 4 close relatives. c A species tree on the basis of 1064 single-copy orthologues from H. tibetana and 10 other representative species. The black numbers represent the divergence times from present. Green and red indicate the numbers of significantly (p < 0.05) expanded and contracted gene families. d KEGG functional classification of contracted gene families. e KEGG functional classification of expanded gene families