Data from: Phylogenetic and population genetic analyses of Phaeosphaeria nodorum and its close relatives indicate cryptic species and an origin in the Fertile Crescent
McDonald, Megan C., Swiss Federal Institute of Technology in Zurich
Razavi, Mohammad, Iranian Research Institute of Plant Protection
Friesen, Timothy L., North Dakota State University
Brunner, Patrick C., Swiss Federal Institute of Technology in Zurich
McDonald, Bruce A., Swiss Federal Institute of Technology in Zurich
Published Sep 13, 2012 on Dryad.
Cite this dataset
McDonald, Megan C. et al. (2012). Data from: Phylogenetic and population genetic analyses of Phaeosphaeria nodorum and its close relatives indicate cryptic species and an origin in the Fertile Crescent [Dataset]. Dryad. https://doi.org/10.5061/dryad.cg32n
The origin of the fungal wheat pathogen Phaeosphaeria nodorum remains unclear despite earlier intensive global population genetic and phylogeographical studies. We sequenced 1,683 bp distributed across three loci in 355 globally distributed Phaeosphaeria isolates, including 74 collected in Iran near the center of origin of wheat. We identified nine phylogenetically distinct clades, including two previously unknown species tentatively named P1 and P2 collected in Iran. Coalescent analysis indicates that P1 and P2 are sister species of P. nodorum and the other Phaeosphaeria species identified in our analysis. Two species, P. nodorum and P. avenaria f. sp. tritici 1 (Pat1), comprised ∼85% of the sampled isolates, making them the dominant wheat-infecting pathogens within the species complex. We designed a PCR-RFLP assay to distinguish P. nodorum from Pat1. Approximately 4% of P. nodorum and Pat1 isolates showed evidence of hybridization. Measures of private allelic richness at SSR and sequence loci suggest that the center of origin of P. nodorum coincides with its host in the Fertile Crescent. We hypothesize that the origin of this species complex is also in the Fertile Crescent, with four species out of nine found exclusively in the Iranian collections.
Coalescent Tree Model for Phaeospaheria spp. Complex
This is a ready to execute XML file generated in Beauti that will run in the program *BEAST. It contains the full dataset, including all isolates and 3 separate loci for the referenced paper. Isolates are grouped into taxa according to species classification. This grouping allows the TMRCA to be estimated for specific taxa or groups of taxa.