Abstract
The application of the polymerase chain reaction (PCR) method of DNA amplification for the isolation of full-length, infectious clones of geminiviruses is described. Non-overlapping, abutting 20-mer oligonucleotide primers were used to produce a linear product from the circular geminivirus genomic template. Clones of African cassava mosaic virus (ACMV) DNA A, obtained by this method, were infectious following mechanical inoculation (in the presence of ACMV DNA B) onto Nicotiana benthamiana. Normal ACMV symptoms resulted and typical geminate viral particles were detected by electron microscopy. The use of PCR for the detection and production of full-length, infectious geminivirus clones is discussed.
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