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. 2010 Feb 23;144(3):293–302. doi: 10.1016/j.vetmic.2010.02.027

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Copyright © 2010 Elsevier B.V. All rights reserved.

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Supplementary Fig. S1 — A phylogenetic relationship among the S1 genes of 74 IBVs. The tree was constructed by ME algorithms. Bootstrap values, estimated from 1000 replicates of the ME method, were conducted in MEGA4. TW strains in the US clade are shown in bold and CH strains in the US clade are shown in italic. The scale bar indicates the number of nucleotide replacement per site.