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Title: TOWARDS MONOPHYLETIC GENERA IN THE GNOMONIACEAE

Author
item Sogonov, M
item Castlebury, Lisa
item Rossman, Amy
item White, Jr., J

Submitted to: Inoculum
Publication Type: Abstract Only
Publication Acceptance Date: 4/25/2005
Publication Date: 7/1/2005
Citation: Sogonov, M., Castlebury, L.A., Rossman, A.Y., White, Jr., J.F. 2005. Towards monophyletic genera in the Gnomoniaceae. Inoculum. 56:54.

Interpretive Summary:

Technical Abstract: Gnomoniaceae is a diaporthaceous family, which includes agents of serious plant diseases such as dogwood, oak and sycamore anthracnoses. Existing generic concepts for the family are based on morphological characters such as presence or absence of stroma, position of the perithecial beak, septation of ascospores. After analyzing LSU and ITS sequence data for approximately 100 isolates of gnomoniaceous species, it is apparent that the largest and most common genera in the family, Gnomonia, Apiognomonia and Cryptodiaporthe are polyphyletic. The relationship of the type species of the family, Gnomonia gnomon, to other presumed species of Gnomonia is clarified. The type species of the anamorphic genus Discula has been linked to a species complex including Apiognomonia errabunda and the type species, A. veneta. However Discula is also apparently polyphyletic and the relationship of the A. veneta/A. errabunda complex to other species of Discula is characterized. Most phylogenetic lineages in the Gnomoniaceae have some preferences for host families but no strict fungus/host relationships were observed. The results of this work demonstrate that new character systems are required for delineating genera in this biologically diverse and economically important group of fungi.