Cryptic species in the Puccinia monoica complex
1Roy, B. A., 2Vogler, D. R., 3Bruns, T. D., and 3 Szaro, T. M. (1998)
1Geobotanical Institute, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland
2 formerly, Biology Department, San Francisco State University, San Francisco, California;
3Department of Plant Biology, University of California, Berkeley, California.
Mycologia 90: 847-854.
In modern taxonomic treatments the Puccinia monoica complex
is treated as four species that are differentiated by the number of
spore states in their life cycles. However, other systematic
treatments have divided the group into species or forms based on host
association. Within the species based on spore state there is
morphological variation, but it has not been readily assignable to
either host species or geographic area.
We used DNA sequencing and phylogenetic analysis to determine
whether there are cryptic species in this group that are not evident
when only morphology is used. We sequenced the nuclear rDNA region
containing the internal transcribed spacers (ITS-1 + 5.8s rRNA gene +
ITS-2) of isolates from different hosts. Our results indicate that
there are cryptic species in the Puccinia monoica complex, and
that species in this group cannot be identified strictly by life