Fig. 5.

Distribution of the habitat-associated OGs. Details of these genes are shown in Table S2. Heatmaps represent the distribution of 13 accessory OGs that significantly associated with HA and NHA habitats. Dark and light gray boxes indicate presence and absence, respectively. The tree topology is derived from Fig. 3, and the typical clades are marked with different colors. Strains from different habitats are represented by circles in different colors (red, HA; green, NHA; blank, uncertain). Asterisks indicate the naive P-value for the null hypothesis that the presence/absence of this OG is unrelated to the habitat (*, P < 0.05; **, P < 0.01)