Table 2. TVB genotypic frequency analysis among different breeds

Line	Genotypic frequency
	No.	tvb S1/S1	tvb S1/S3	tvb S3/S3	tvb S1/R1	tvb S3/R1	tvb S1/R3	tvb R1/R1	tvb R3/R3
White Leghorn	46	0.04 (2/46)	0.11 (5/46)	0.07 (3/46)	0.33 (15/46)	0.22 (10/46)	0	0.24 (11/46)	0
Korean Ogye	46	0	0	0	0	0	0.15 (7/46)	0	0.85 (39/46)
Korean Native Chicken	47	0	0	0	0	0	0.02 (1/46)	0	0.98 (46/47)