Summary of sequence alterations in the field and laboratory-propagated FBNSV populations. Nanovirus DNAs are shown in a linear fashion as scaled line drawings, with ORF sequences represented as gray bars. Positions of variable sites are indicated by bicolored vertical lines: the upper parts of the vertical lines denote the nucleotide present in the FBNSV-[ET:Hol;1997] consensus sequence and the bottom part the allele. Mutations that were found completely fixed in the FBNSV-[ET:Hol;JKI-2000] population are shown in bold italics, and mutations found in the majority of cases are shown in bold. Nucleotides are color coded as in Applied Biosystems BigDye terminator sequencing: A, green; T, red; C, blue; and G, black. Deletions (Δ) or recombinant sequences are represented by blank or magenta sections of the scaled lines, respectively. Insertions are marked by a +.