Figure 1

Genomic comparisons of the phages sequenced here. A) A neighbor joining tree based on presence/absence of orthologous gene families. This tree includes the phages sequenced here (in red) as well as previously sequenced Salmonella phages and known phage genera infecting Enterobacteriaceae (in black; see Additional file 1). Circles indicate the 8 phage clusters that contained phages characterized here; bootstrap values (grey numbers, based on 1,000 replicates) are shown for selected branches that lead to these 8 clusters. B) Dot plot comparison of nucleotide identity of the 22 phages sequenced here. This comparison was performed with Gepard [79]. The vertical axis shows the phage IDs and the horizontal axis indicates the phage clusters; the apparent diagonal lines indicate high levels of nucleotide identity; while each phage shows 100% identity to itself (displayed as a diagonal line), comparisons of two phages that differ only by a few SNPs (e.g., cluster 6 phages FSL SP-062 and FSL SP-069, which differ by 4 SNPs) will also show up as an apparent uninterrupted line as a small number of differences is not visible with the resolution possible.