INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y BIOTECNOLOGIA
Unidad Ejecutora - UE
Fusarium poae pathogenicity and mycotoxin accumulation on selected wheat and barley genotypes at a single location in Argentina
STENGLEIN S. A.; DINOLFO M.I.; BARRIOS G.G.; BONGIORNO F.; CHULZE S.N.; MORENO M.V.
AMER PHYTOPATHOLOGICAL SOC
Año: 2014 vol. 98 p. 1733 - 1738
Fusarium poae is a relatively weak pathogen with increasing importance in cereal grains principally due to its capacity to produce several mycotoxins. In this study we evaluated the pathogenicity and toxin accumulation of individual F. poae isolates on wheat and barley under natural conditions for 3 years. Analysis of variance demonstrated significant differences for year x genotype, year x isolate, genotype x isolate, and year x genotype x isolate interactions for both incidence and disease severity. Based on contrast analysis Apogee was more susceptible than the other wheat genotypes, wheat genotypes were more susceptible than barley genotypes, durum wheat genotypes were more susceptible than bread wheat genotypes, and barley genotype Scarlett had greater symptom development per spike than the other barley genotypes. Neither HT-2 nor T-2 toxins were detected in the grain samples. However, high levels of nivalenol were found in both wheat and barley samples. The increased reported isolation of F. poae from wheat and barley, and the high capacity to produce nivalenol of this fungus underlies the needs of more studies on F. poae-host interactions, especially for barley.