Sequence analysis of the tuf gene of different isolates of
“Ca. P. australiense” in New Zealand determined that there
are nine different tuf variant groups (I-IX) that cluster into
two distinct clades (Andersen et al. 2006). Out of 36
isolates there was no obvious correlation between the tuf
group, host or geographic location. Andersen et al. (2006)
also analysed the available tuf gene sequences from
Australian isolates and determined that some isolates
formed a third distinct tuf gene clade while other isolates
clustered into one of the clades formed by the New Zealand
isolates.