Fig. 4
From: Prevalence and sequence analysis of equid herpesviruses from the respiratory tract of Polish horses
Phylogenetic tree of equid γ-herpesviruses (EHV) based on 726 bp fragment from gB gene (nt 703–1429 in EHV-2 accession number NC_001650.2 and nt 700–1426 in EHV-5 accession number NC_026421.1). The sequences used included Polish EHV-2 sequences (n = 57), Polish EHV-5 sequences (n = 2), and international sequences of EHV-2 (n = 26) and EHV-5 (n = 7) sourced from GenBank. The Polish sequences obtained in the current study are labelled PL_EHV2_ID number_ stud number. Accession numbers for sequences from GenBank are included in the description of each sequence. The evolutionary history was inferred by using the maximum likelihood method based on the Kimura 2-parameter model. The tree with the highest log likelihood (− 6036.44) is shown. The percentage of trees in which the associated taxa clustered together is shown next to the branches. The tree is drawn to scale, with branch lengths measured in the number of substitutions per site. Evolutionary analyses were conducted in MEGA5 [43]. The phylogenetic groups 1, 2, and 3 as defined by Sharp et al. [33] are shown on the right, with new groups labelled 4, 5, and 6. Clades within group 1 are labelled A, B, and C. Samples from the same stud are labelled with the rectangle of the same colour