Fig. 4.

Recombination events in the genome of GVI-1 strains. A Simplot analysis was performed to detect recombination within the genomes (A). The complete genomic sequence of the GX-YL5 strain was used as the query sequence in the SimPlot analysis. The window width and step size were set to 1000 bp and 100 bp, respectively. The grey region shows the spike gene and Gene 3 sequences of the GVI-1 viruses. Phylogenetic trees were constructed using different nucleotide fragments based on the results of the SimPlot analysis (B). The GenBank accession numbers for the S1 gene sequences of the viruses are the same as those presented in Supplementary Fig. 3.