Figure 9
From: Structure and dynamics of the pan-genome of Streptococcus pneumoniae and closely related species
Maximum likelihood phylogenetic tree obtained using the SNPs of the core genome of the 44 strains of S. pneumoniae , 4 strains of S. mitis and 1 strain each of S. oralis and S. infantis. For clarity the clade containing the S. pneumoniae strains has been collapsed. The numbers on the internal nodes label the last common ancestor of the S. pneumoniae species (1), of the S. mitis species (2), and of the S. pneumoniae-S. mitis complex (3).