
Parsimony analysis of Y. pestis strain microarray data. Bootstrap 50% majority-rule consensus tree with bootstrap values (1000 replicates) overlying branch points. A total of 22 characters were used, of which 8 were parsimony informative and given equal weight. Six equally parsimonious trees were found (see Supplemental Data, available at www.genome.org). Strain names are followed by their biovar in parentheses.











