Submitted to: International Botanical Congress
Publication Type: Abstract Only
Publication Acceptance Date: 8/7/1999
Publication Date: N/A
Technical Abstract: Gene phylogenies have revealed considerable phylogeographic patterns of molecular variation in several species-rich lineages of Fusarium, the single most important genus of plant pathogenic and toxigenic fungi. These include the Gibberella fujikuroi species complex noted for the gibberellin plant hormones, the Fusarium solani species complex comprising at least 50 species, the Fusarium oxysporum complex with over 120 plant host-specific taxa called formae speciales, and the Fusarium graminearum species complex noted for the ongoing wheat scab epidemic in the northern hemisphere and for production of trichothecene mycotoxins. Multigene genealogies are concordant within the F. solani and F. oxysporum complexes.