INVESTIGADORES
CHULZE Sofia Noemi
congresos y reuniones científicas
Título:
-Diversity of Gibberella zeae population isolated from wheat in Argentina.
Autor/es:
RAMIREZ, M.L; REYNOSO, M.M; FARNOCHI, M.C; TORRES, A.M.; CHULZE, S.N; LESLIE, J.F
Lugar:
Cairns, Australia
Reunión:
Congreso; 8th International Mycological Congress.; 2006
Institución organizadora:
International Society of Mycology
Resumen:
Abstract:(Your abstract must use Normal style and must fit in this space) Wheat production in Argentina reaches about 16 millon tons. The main pathogen associated with Fusarium Heald Blight (FHB) in wheat in Argentina is Gibberella zeae (anamorph Fusarium graminearum). In Argentina during the last 50 years epidemic of varying degrees of severity occurred. The aims of this work was to evaluate the genetic diversity of G. zeae populations isolated from wheat in Argentina by Amplified Fragment Length Polymorphism (AFLP). We collected wheat spikes during severe FHB epidemic, harvest season 2001/02 in different wheat production areas in Argentina. Gibberella  zeae  was  isolated from 50 spikes showing symptoms from each field planted with the same hybrid (Pro Inta Granar, highly susceptible). The disease severity was estimated as > 70 % in all the localities. All the G. zeae strains identify by morphology were able to form perithecia on carrot agar.  The AFPL analysis using three specific primer pair combinations Eco+AA/Mse+AT, Eco+CC/Mse+CG, and Eco+TG/Mse+TT  allowed  to resolved 216 loci from130 isolates. Among the 216 loci scored 200 loci were polymorphic (88%). Populations of G. zeae causing FHB on wheat from Argentina include isolates that cluster with phylogenetic lineage 7. The high genetic diversity found by AFLP is correlated with the high degree of VCG diversity find in the same populations in a previous study. Generic template 1.1