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J Gen Virol 88 (2007), 1733-1737; DOI 10.1099/vir.0.82629-0

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Short Communication

Evidence for recombination in natural populations of porcine circovirus type 2 in Hong Kong and mainland China

Ching-Man Ma1, Chung-Chau Hon1, Tsan-Yuk Lam1, Vince Yik-Yeung Li1, Creany Ka-Wai Wong1, Tulio de Oliveira2 and Frederick Chi-Ching Leung1

1 Department of Zoology, The University of Hong Kong, Hong Kong SAR
2 Department of Zoology, The University of Oxford, Oxford OX1 3PS, UK

Correspondence
Frederick Chi-Ching Leung
fcleung{at}hkucc.hku.hk

Porcine circovirus type 2 (PCV2) belongs to the family Circoviridae, and is the causative agent of post-weaning multisystemic wasting syndrome (PMWS) in pigs. In this study, phylogenetic analyses of three complete PCV2 genomic sequences from Hong Kong suggest that natural recombination happened among different lineages of PCV2. A preliminary investigation of the parental strains of these potential recombinants was carried out using bootscanning. Statistical significance of this recombination event was tested and positions of the potential recombination breakpoints were estimated in a maximum-likelihood framework. The recombinant breakpoints were estimated to be located within the origin of replication (ori) and replicase (rep) gene of PCV2. Interestingly, several GenBank sequences of PCV2 in mainland China were found to have a recombination pattern similar to that of the potential PCV2 recombinants from Hong Kong, implying that this recombinant genotype might already be widespread within mainland China.

The GenBank/EMBL/DDBJ accession numbers for the sequences determined in this study are DQ997815–DQ997817.

Supplementary material is available with the online version of this paper.






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