Biodiversity of Fusarium species in Mexico associated with ear rot in maize
I. Morales-Rodríguez, M. de J. Yáñez-Morales, H.V. Silva-Rojas, G. García-de-los-Santos and D.A. Guzmán-de-Peña.
Journal of Plant Pathology Volume 90 (2, Supplement) August 2008, Book of Abstract, 9th International Congress of Plant Pathology, August 24-29, 2008 Torino,Italy,. 507 pages.
2008
บทคัดย่อ
Biodiversity of Fusarium species in Mexico associated with ear rot in maize
Fusarium proliferatum, Fusarium subglutinans, andFusariumverticillioidesare known causes of ear and kernel rot in maizeworldwide. InMexico, onlyF. verticillioidesandF.subglutinans,have been reported previously as causal agents of this disease.However,Fusariumisolates with different morphological characteristics were obtained in the Highland-Valley region of this country from symptomatic and symptomless ears of native and commercial maize genotypes. Moreover, besides the morphological studies, analyses based on the Internal Transcribed Spacer region and the Nuclear Large Subunit Ribosomal partial sequences led to the identification of identification ofF. subglutinans,F. solani, andF. verticillioides, as well as four species (F. chlamydosporum,F. napiforme,F. poae, andF. pseudonygamai) that had not previously been reported to be associated with ear rot. In addition,F. napiformeandF. solaniwere absent from symptomless kernels. Phylogenetic analysis showed genetic changes inF. napiformeandF. pseudonygamaiisolates. Our results suggest that the biodiversity ofFusariumspecies involved in ear rot inMexicois greater than reported previously in other places in the world. This new knowledge will permit a better understanding of the relationship between all the species involved in ear rot disease and their relationship with maize.