Fig. 2: Genotype analysis and lineage determination of the viral genomes and the difference among the three groups.
a The viral genotypes from our data and public genome data. The heatmap shows genome clustering based on 17 high-frequency SNPs. The purple lines above the heatmap indicate the genomes sequenced in this study. The sublineages are marked on the top16, and the geographic sources of the genomes are marked below the lineage. b The minimum-spanning tree of the seven clusters. The genomes from different continents are displayed on the pie by colors. The SNP differences are displayed on the lines between two clusters, and those caused by non-synonymous mutations are in red. c The histogram on the top displays the numbers of genomes we sequenced from each group in each cluster, and that at the bottom displays the early major lineages16 corresponding to each cluster. d The numbers of viruses from different clusters emerged in the three groups during the outbreak. The pie charts at the right show the proportion of the clusters in the three groups. Source data are provided as a Source Data file.
