Phylogenetic analysis of the cycloviruses, circoviruses and circovirus-like virus, and representative cyclovirus and circovirus species based on the complete amino acid sequence of the Rep protein using the neighbour-joining method with p-distance and 1000 bootstrap replicates. The bar represents 10 % estimated phylogenetic divergence. The GenBank accession numbers of the Rep sequences of viruses used in the phylogenetic analyses are as follows: beak and feather disease virus (BFDV, AF071878), canary circovirus (CaCV, AJ301633), CoCV (AF252610), duck circovirus (DuCV, DQ100076), goose circovirus (GoCV, AJ304456), gull circovirus (GuCV, DQ845074), finch circovirus (FiCV, DQ845075), raven circovirus (RaCV, DQ146997), starling circovirus (StCV, DQ172906), cygnus olor circovirus (SwCV, EU056310), PCV1 (AY660574), PCV2 (AY424401), chicken anemia virus (CAV, M55918), milk vetch dwarf virus (AB009047), pepper golden mosaic virus (U57457), cycloviruses (GQ404844–GQ404850, GQ404854–GQ404858, HM228874 and HM228875).