Abstract
A map of the sites in the genome of Costelytra zealandica iridescent virus (CzIV), using the restriction enzymes BamHI, KpnI, and PstI, showed the genome size to be 170.2 kbp in length. It was found that the genome was cyclically permuted and that 39% of the genome of CzIV contained repetitive sequence elements. The genome was found to hybridize with the genome of another iridescent virus, type 9 (WIV), in DNA-DNA hybridization experiments. A region of the WIV DNA genome (23.4 kbp) did not hybridize with CzIV DNA and this region is similar in size to the total genomic size difference between CzIV and WIV (22.4 kbp). A unique repeat sequence from iridescent virus type 6 (CIV) was shown to be present in the genome of WIV but not that of CzIV. Finally, the positions of the major capsid protein genes, VP53 and VP52, in the restriction enzyme maps for type 16 and type 9 respectively were determined.
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