Table 1 HdIV segments predicted to encode the rep genes analysed in this work. Segment names and putative sizes are indicated. Segment names were given alphabetically from the shortest to the longest; however only segments for which a real (completely sequenced; SH-E and SH-G) or estimated (PCR fragment; SH-J, SH-H and SH-A2 containing rep7 sequence) size could be given were named. SH-x and SH-y stand for segments of unknown size (since molecular weigh marker represents linear DNA).Rep7 is underlined because of discrepancy between PCR and Southern-blot results. For each segment, the rep gene(s) identified after sequencing of PCR amplification fragments or by Southern-blot analysis are reported