@ARTICLE{TreeBASE2Ref15642, author = {M. I. Groenwald and R. E. Barnes and A. V. Bradshaw and Angie Dale and Anna Brown and Johannes (Ewald) Zacharias Groenewald and Kathy J. Lewis and Brenda D Wingfield and Michael J Wingfield and Pedro W. Crous}, title = {Characterization and Distribution of Mating Type Genes in the Dothistroma Needle Blight Pathogens}, year = {2007}, keywords = {}, doi = {}, url = {}, pmid = {}, journal = {Phytopathology}, volume = {}, number = {}, pages = {}, abstract = {Dothistroma septosporum and D. pini are the two main causal agents of Dothistroma needle blight of Pinus spp. in natural forests and plantations. Degenerate primers were used to amplify the partial mating type genes (MAT1-1-1 and MAT1-2) and chromosome walking was applied to obtain the full-length genes in both species. The mating type-specific primers designed in this study could distinguish between the morphologically similar D. pini and D. septosporum as well as between the different mating types of these species Screening of isolates from global collections of D. septosporum, the pathogen that has spread throughout P. radiata plantations of the southern hemisphere, showed that only MAT2 isolates are present in Australian and New Zealand collections, where only the asexual form of the fungus have been found. In contrast, both mating types of D. septosporum were present in collections from Canada where the sexual state of the fungus is known. Intriguingly, collections from South Africa, where the sexual state of the fungus is unknown, , included both mating types. In D. pini, for which no teleomorph is known, both mating types were present in collections from the United States of America. These results provided new insights into the biology and global distribution of two of the worlds most important pine pathogens and they should facilitate management of the diseases caused by these fungi.} }

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