Fig. 2

SNPs phylogeny, protospacers, gene content tree and predicted mobile genetic element distribution. a The phylogenetic tree generated from the core genome SNPs of the twelve Moritella viscosa isolates using the Maximum likelihood method. Bootstrap values of 1000 repetitions are shown adjacent to nodes. The twelve M. viscosa strains used in this study separates into four different lineages; variant M. viscosa (as defined by [5]) sub-grouped into clade 1–3, and typical (as defined by [5]) M. viscosa. Colour-coding of the phylogenetic tree represent the presence of CRISPR-Cas system type I (light grey, clade 1 and 2), and CRISPR-Cas system type II (dark grey, typical M. viscosa). Variant clade 3 without colour has no predicted CRISPR-Cas system. Spacer distribution that matches plasmid-like elements are show for each isolate and denoted to the right of strains as a = spacer matching plasmid A, b = spacer matching plasmid B, and c = spacer matching plasmid C. The following black box represent the presence of pA = plasmid A, pB = plasmid B or pC = plasmid C. b Gene content tree of the twelve M. viscosa genomes examined. The topology of the tree is congruent, with exception of the NVI 5450 strain, to the SNP phylogeny providing further support to the relationships among the divergent M. viscosa lineages. c Distribution of the putative prophages in M. viscosa. The strain organization in the table column reflects the phylogenetic relationships in the gene content tree and the SNP tree. There are nine prophages that are shared by more than one genome. Cells highlighted in black or grey are categorized by the PHAST prediction tool as an intact or questionable prophage region, respectively. The letter(s) S-SSS denote the number of matching spacers to this prophage