FIG. 1.

Genomic organization of RYMV (bottom) and nucleotide diversity index along the genome (top). The diversity index (π), average number of nucleotide differences per site between two sequences, was calculated along the genome by using a sliding window of 100 nt moved by steps of 25 nt after alignment of the 16 sequences. The value is assigned to the nucleotide at the midpoint of the window. Key conserved amino acid motifs and frameshift (FrSi) or transcription (TrSi) signals are indicated (see text for details).