Gene distribution based on M-CGH and PCR. a) PCR-based characterization of the 174 strains. b) Clustered M-CGH data by the UPGMA method. Each column represents a strain, while each row stands for a different gene. Genes are arranged according to the genomic location of strain RIMD2210633. For each strain, a black area indicates the presence of a gene, whereas white absence, and grey missing data. The GC content curve is shown on the right. The UPGMA tree is shown at bottom.