Population Structure of Fusarium graminearum Species Complex Genotypes and Chemotypes in Relation to Trichothecenes Production

Abstract

Argentina is the fourth largest exporter of wheat in the world. Fusarium Head Blight (FHB) is one of the most important fungal diseases of wheat worldwide. The main pathogen associated with FHB in Argentina is Fusarium graminearum sensu stricto (teleomorph Gibberella zeae) within the Fusarium graminearum species complex. This specie can produce the type B trichothecenes usually deoxynivalenol (DON) and its acetylated forms 3-ADON and 15-ADON or nivalenol (NIV). Also DON/NIV genotypes have been observed which chemotype was DON. The G. zeae populations from Argentina are genetically and genotypically diverse.