The genome of the multicapsid baculovirus of Orgyia pseudotsugata: restriction map and analysis of two sets of GC-rich repeated sequences.

Five cosmids containing inserts that comprise the complete genome of the multicapsid nuclear polyhedrosis virus of Orgyia pseudotsugata were mapped with four restriction enzymes (Bg/II, ClaI, SstI, XhoI). From these cosmid maps, composite maps of the complete genome were constructed for each restriction enzyme. A region containing repeats of the sequence GGC downstream of the polyhedrin gene was used to probe the genome. It cross-hybridized with a region which, upon sequence analysis, was found to be a highly repetitive GC-rich region of nearly 500 nucleotides. The two GC-rich regions appeared to be evolutionarily unrelated.