Fig. 2

Phenotypic profiles of Phytophthora ramorum isolates. Each dot represents the standardized mean value of one of 34 isolates for which irregularity index (percent difference of the maximum and minimum radii within a 45-degree sector) of axenic culture and lesion size on Rhododendron foliage were measured. K-means clustering grouped isolates into three clusters. Isolates with nwt colony phenotype (shown in red circles and squares) are found only in Cluster 3. Cluster 1 contains wt isolates that were aggressive on Rhododendron leaves, whereas Cluster 2 contains isolates that were less aggressive and had wild-type colony morphology. Symbols are: red circle, nwt Washington state isolates; red square, nwt California isolates; green circle, wt Washington State isolates; green square, wt California isolates. Isolate numbers and chromosomal aberration types are indicated for those subjected to genome analyses