FIG 2.

Radial phylogenetic tree showing evolutionary relationships between EEHV1, EEHV2, EEHV3, EEHV4, EEHV5, and EEHV6 in the highly conserved U38(POL) DNA gene. The diagram shows a distance-based Bayesian nearest-neighbor evolutionary tree dendrogram produced in MEGA5 illustrating the branching patterns of the GC-rich (EEHV3 plus EEHV4) compared to the AT-rich EEHV groups and of the two distinct subgroups (EEHV1 plus EEHV6 compared to EEHV2 and EEHV5) within the AT-rich branch. After several small gaps and nonaligned nucleotides were omitted, the final data set for the segment of U38(POL) gene DNA used that is common to all eight EEHV types was 1,077 bp. The number of nucleotide substitutions per site is shown by the bar.