Fig. 7

Best maximum likelihood phylogenetic tree based on chloroplast genomes of 53 species (including 25 species of Theaceae). A shows the phylogenetic tree constructed by the chloroplast genome. Numbers above each branch are the maximum likelihood bootstrap of each clade > 50%. The four different background colors indicate different orders, respectively. The red font indicates the species of this study. In the top left corner is a tree with branch length information. Pentagrams of different colors at the nodes represent the Theaceae family and delineate its three distinct tribes. B shows the information loci of organelle genes involved in the construction of phylogenetic relationships (number of informative loci/effective length of the gene). Red indicates the chloroplast genome (Cp), and blue indicates the mitochondrial genome (Mt)