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. 2019 Sep 26;11(10):898. doi: 10.3390/v11100898

Figure 1.

Figure 1

Figure 1

Figure 1

Phylogenetic trees of gene S1 (a), E (b), M (c), and N (d) of IBVs, where the 64 IBV strains isolated during 2009–2017 are marked with filled black triangles and 27 IBV strains isolated during 1985–2008 are marked with filled red circles. Each type of IBV was grouped in one circle and the representative strains were boxed. Phylogenetic trees were constructed with the neighbor-joining method using MEGA version 6.06. The bootstrap values were determined from 1000 replicates of the original data. The branch number represents the percentage of times that the branch appeared in the tree. Bootstrap values greater than 50% are shown. The p-distance is indicated by the bar at the bottom of the figure.