The Unique Homothallic Mating-Type Loci of the Fungal Tree Pathogens Chrysoporthe syzygiicola and Chrysoporthe zambiensis from Africa.

and are ascomycete tree pathogens first described from Zambia, causing stem canker on and , respectively. The taxonomic descriptions of these two species were based on their anamorphic states, as no sexual states are known. The main purpose of this work was to use whole genome sequences to identify and define the mating-type () loci of these two species. The unique loci for and consist of the , , and genes, but the gene is absent. Genes canonically associated with opposite mating types were present at the single mating-type locus, suggesting that and have homothallic mating systems.