Fig. 1

Genomic structure of SX1 and similarity analysis basing on full genome nucleotide sequences. The similarity analysis of complete genomes was calculated by Simplot 3.5.1 with a sliding window of 200 nucleotides moving in steps of 20 nucleotides. All positions with gaps were deleted, and the nucleotide similarity was plotted using the JC model of nucleotide substitution. All sequences were divided into four groups, group A marked with red line included 6 TMEV strains (GenBank accession no. KJ191558, EU718733, M16020, EU718732, M20562, and M20301), group B just included SX1 as query, group C marked with yellow line only had one TRV strain (GenBank accession no. AB090161), group D marked with blue line only had one SAFV strain (GenBank accession no. EF165067)