FIG. 2.

Compatibility matrix for concatenated sequence data of six genes of S. uberis. White squares and black squares indicate compatibility and incompatibility of sequence polymorphisms, respectively. The number of parsimony-informative sites for each gene is shown in parentheses after the gene designation. The right panel shows results for housekeeping genes of 50 isolates, while the left panel shows results for the core set of 49 isolates obtained after exclusion of highly divergent isolate FSL Z1-015. The core set shows perfect within-gene compatibility for gapC, sodA, and tuf as indicated by the white triangles. Results for oppF and pauA did not differ between panels because FSL Z1-015 did not yield amplicons for those genes, and sequence data were thus not included in either reticulogram.