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Unrooted phylogeneitc tree based on the 5′UTR sequences. Phylogenetic tree of the 5′UTR from 16 BVDV positive samples was constructed by the neighbor-joining (NJ) method (Kimura two-parameter method) with the sequences published in GenBank. The nucleotide length of the 5′UTR used for the analysis was 230 bp. The numbers at the phylogenetic branches indicate the bootstrap values (1000 replicates) in percentage supporting each group. The bar represents a genetic distance.
