Classification of turnip mosaic virus isolates according to the 3'-untranslated region.

The 3'-untranslated region (3'UTR) of five isolates of turnip mosaic virus (TuMV) from United Kingdom, Canada, Greece, the Czech Republic and from Uzbekistan were sequenced and compared with another nine previously sequenced TuMV isolates. All the isolates had 209 nucleotides long 3'UTR, with the exception of the Uzbekistan isolate, which had one-base deletion at nucleotide (nt) position 162. Phylogenetic analysis identified three clusters of related isolates. The clusters correlated with secondary folding of the 3'UTRs, partially with the source host plant of the isolates but not with their geographical origin.