Exploratory numerical taxonomy based on biochemical and biophysical characters of the tymoviruses.

Three different exploratory analytical techniques, principal components analysis, reciprocal averaging and cluster analysis, were used to examine taxonomic relationships among the tymoviruses. The three techniques gave similar but not identical interpretations of the interrelationships within this group. Exploratory numerical analyses were useful in assessing relatedness, and they suggest that andean potato latent virus is misclassified as a strain of eggplant mosaic virus.