Abstract

Summary

Double-stranded cDNA has been synthesized from RNA of a severe strain of potato spindle tuber viroid using a synthetic oligodeoxyribonucleotide as a primer. Upon Cloning in bacteriophage. M13mp9, two recombinant phages were selected to construct a p8R322-derived plasmid containing a complete viroid DNA copy. Elucidation of the nucleotide sequence revealed four differences with the previously establishment sequence of another PSTV strain, three of which were base exchanges and one a deletion.

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Author notes

* Present address: Laboratory of Biochemistry, University of Nijmegen, 6525 EZ Nijmegen, The Netherlands

+ Gorlaeus Laboratories, State University of Leiden, P.O. BoX 9502, 2300 RA Leiden The Netherlands

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