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. 2018 Jun 8;36(29):4245–4254. doi: 10.1016/j.vaccine.2018.05.123

Fig. 1.

Fig. 1

Phylogenetic analysis based on S1 gene sequences of IBV strains. Bootstrap values were determined from 1000 replicates of the original data. Black circle indicates the isolated ZYY-2014 strain. Scale bar indicates amino acid substitution rate.