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Title:   Author  item
                                            TORRIANI, STEFANO F - SWISS FED. INSTIT OF TECHitem
                                            Goodwin, Stephen

                                                         - *Steve*item
                                            KEMA, GERT H - PLANT RES. INTERN, NETHERitem
                                            PANGILINAN, JASMYN - ENERGY JOINT GENOME INSTIitem
                                            MCDONALD, BRUCE - SWISS FED. INST. OF TECH
  Submitted to: International Septoria Stagonospora Workshop
                                    Publication Type: Abstract Only
                                    Publication Acceptance Date: 7/26/2008
                                    Publication  Date: 8/18/2008
                                    Citation: Torriani, S.F., Goodwin, S.B., Kema, G.J., Pangilinan, J.L., Mcdonald, B.A. 2008. Intraspecific comparison and annotation of two complete mitochondrial genome sequences from the plant pathogenic fungus Mycosphaerella graminicola. International Septoria Stagonospora Workshop. Available at: http://www.path.ethz.ch/news/conferences/Mycosphaerella_Ascona_2007/00021_posterabstract.pdfInterpretive Summary:
                                Technical Abstract: The mitochondrial genomes of two isolates of the wheat pathogen Mycosphaerella graminicola were sequenced completely and compared to identify polymorphic regions. This organism is of interest because it is phylogenetically distant from other fungi with sequenced mitochondrial genomes and it has shown discordant patterns of nuclear and mitochondrial diversity. The mitochondrial genome of M. graminicola (EU090238) is a circular molecule of approximately 43,960 bp containing the typical genes coding for 14 proteins related to oxidative phosphorylation, one RNA polymerase, two rRNA genes and a set of 27 tRNAs. The mitochondrial DNA of M. graminicola lacks the gene encoding the putative ribosomal protein (rps5-like), commonly found in fungal mitochondrial genomes. Most of the tRNA genes were clustered with a gene order conserved with many other ascomycetes. A sample of thirty-five additional strains representing the known global mt diversity was partially sequenced to measure overall mitochondrial variability within the species. Little variation was found, confirming previous RFLP-based findings of low mitochondrial diversity and isolates of M. graminicola adapted to durum wheat had unique RFLP and SNP haplotypes. The mitochondrial sequence of M. graminicola is the first reported from the family Mycosphaerellaceae or the order Capnodiales. The sequence also provides a tool to better understand the development of fungicide resistance and the conflicting pattern of high nuclear and low mitochondrial diversity in global populations of this fungus.


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