Table 3.

Average nucleotide sequence homology within and between PCV2 genotypes

Nucleotide homology within genotypes (%)		Nucleotide homology between PCV2 genotypes (%)
	Genotype	PCV2a	PCV2b	PCV2d
99.4 ± 0.2 (99.1–99.6)	PCV2a	–	–	–
98.7 ± 0.5 (98.1–99.4)	PCV2b	91.4 ± 0.3 (91.0–92.0)	–	–
99.5 ± 0.3 (98.6–100)	PCV2d	90.4 ± 0.2 (89.6–91.0)	93.9 ± 0.3 (93.2–94.3)	–

Homology was determined by the maximum-likelihood method based on the GTR model with G + I in MEGA 6.06 software. Bootstrap values were calculated with 1000 replicates. The analysis includes Korean ORF2 sequences isolated after 2015