Abstract
The 25R strain of porcine adenovirus type 1 (PAV-1) and the A47 strain of PAV-2 were propagated in ST cells, and DNA was extracted from the infected cells by a modified Hirt method. The DNA of each virus was digested by each of nine restriction endonucleases, and restriction enzyme fragments representing the entire genome were cloned. The genomic size of each virus was approximately 33 kb. Physical maps for the nine restriction endonucleases were constructed from the results of double digestion and Southern blot hybridization experiments, and oriented with respect to the PAV-3 genome. PAV-1 and PAV-2 were found to be related genetically to PAV-3, and there was a closer relationship between PAV-1 and PAV-3 than between PAV-1 and PAV-2 or between PAV-2 and PAV-3.
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