Table 1.

The p-distances of S1 coding region¹ between our IBV isolates and the vaccine strains.

Strain	LJL/130906		LJL/140820		I1124/16		I0306/17
	NT2	AA2	NT	AA	NT	AA	NT	AA
H120 (M21970-Netherlands)	0.020	0.024	0.002	0.004	0.020	0.024	0.001	0.000
H120 (MK071267-Brazil)	0.021	0.026	0.002	0.006	0.021	0.026	0.002	0.002
H120 commercial vaccine D (KU736751-Brazil)	0.003	0.007	0.018	0.020	0.002	0.004	0.020	0.020
H120 (EU822341-China-Taiwan)	0.019	0.022	0.002	0.006	0.019	0.022	0.002	0.002
H120 (FJ807652-China)	0.020	0.026	0.003	0.009	0.020	0.026	0.004	0.006
H120 (MK937831-China)	0.020	0.024	0.001	0.004	0.020	0.024	0.003	0.004
H120 (FJ888351-China)	0.020	0.024	0.001	0.004	0.020	0.024	0.003	0.004
H120 (KF188436-India)	0.019	0.022	0.001	0.002	0.019	0.022	0.002	0.002
H120 (GU393335-USA)	0.020	0.022	0.001	0.002	0.020	0.022	0.002	0.002
H120 (KR605489-Iran)	0.021	0.024	0.002	0.004	0.021	0.024	0.001	0.000
W93 (AY842862-China	0.022	0.028	0.003	0.007	0.022	0.028	0.005	0.007
D41 (AH014596-China)	0.022	0.030	0.004	0.009	0.022	0.030	0.006	0.009
HK (AY761141-China)	0.020	0.024	0.002	0.007	0.020	0.024	0.004	0.007
H94 (DQ515801-China)	0.022	0.028	0.003	0.007	0.022	0.028	0.005	0.007
IBN (AY856348-China)	0.021	0.026	0.002	0.006	0.021	0.026	0.004	0.006
Ma5 (KY626045-Brazil)	0.019	0.024	0.001	0.000	0.019	0.024	0.004	0.004
Mass commercial vaccine (EU359657-USA)	0.001	0.002	0.020	0.023	0.001	0.002	0.021	0.023
H52 (EU817497-China)	0.019	0.030	0.009	0.017	0.019	0.030	0.010	0.013
M41 (MK937830-China)	0.018	0.034	0.025	0.039	0.018	0.034	0.025	0.037

Abbreviations: IBV, infectious bronchitis virus; Mass, Massachusetts.

¹The first 1620 nucleotides, starting at the AUG translation start codon, of the S1 protein genes were compared.

²NT, nucleotide; AA, amino acid.