Fig. 1.
Phylogenetic analysis of all PVYC isolates and three PVYN and three PVYO isolates based on the nucleotide sequence alignment of the CP cistron (nt 8567-9367 PRI-509). Only bootstrap values greater than 70% are shown. The bar represents a p-distance of 0.1. Strain groups are marked at the right side of the figure: groups PVYN and PVYO are indicated as N and O, respectively. The two different phylogenetic PVYC subgroups are referred to as C1 and C2, respectively. The CP sequence of bidens mosaic virus isolate b (BiMV-b) was used as an outgroup. Sequence identifiers are accession numbers, with isolate names given in brackets and potato isolates underlined