Artículo
Responses to selection of S5inbreds for broad-based resistance to ear rots and grain mycotoxin contamination caused by Fusarium spp. in maize
Presello, Daniel; Pereyra, Andrés O.; Iglesias, Juliana; Fauguel, Carolina María; Sampietro, Diego Alejandro
; Eyherabide, Guillermo Hugo
Fecha de publicación:
03/2011
Editorial:
Springer
Revista:
Euphytica
ISSN:
0014-2336
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Random S5inbreds derived from three F2maize (Zea mays L.) populations (L1934 × LP918, LP915 × LP2541 and L7310 × L7266) were selected for ear rot resistance after inoculation with a low-fumonisin producing isolate belonging to F. proliferatum. The four less susceptible and the four most susceptible inbreds from each population were crossed and F1seeds were pooled. Resistant and susceptible pools from each population were evaluated for disease severity (percentage of the ear visibly diseased) after inoculation with the isolate used for selection, and high toxigenic isolates belonging to F. verticillioides and F. graminearum. Grain mycotoxin concentration was assessed by ELISA. Differences in disease resistance to each fungus were observed between resistant and susceptible pools in most populations and environments indicating that selection after inoculation with a single species might be effective to develop broad-based resistance to Fusarium. Resistant pools exhibited, after inoculation with F. verticillioides, low grain fumonisin concentrations in most populations and years. Positive genotypic correlations between disease severity and fumonisin concentration (0.89 < rg< 0.98, depending on fungal species and year) indicate that selection for disease severity accounted for most of the variability for field fumonisin accumulation. Selection seemed to be also effective to reduce grain deoxynivalenol and zearalenone concentrations after inoculation with F. graminearum. Ratios between grain deoxynivalenol concentration and disease severity were lower in L7310 × L7266 than those observed in the other populations suggesting that mechanisms affecting mycotoxin accumulation might exist in this population and additional responses should be feasible if including deoxynivalenol concentration as another selection parameter.
Palabras clave:
Deoxynivalenol
,
Disease Resistance
,
Fumonisins
,
Fusarium
,
Maize
,
Zearalenone
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - NOA SUR)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Articulos(INQUINOA)
Articulos de INST.DE QUIMICA DEL NOROESTE
Articulos de INST.DE QUIMICA DEL NOROESTE
Citación
Presello, Daniel; Pereyra, Andrés O.; Iglesias, Juliana; Fauguel, Carolina María; Sampietro, Diego Alejandro; et al.; Responses to selection of S5inbreds for broad-based resistance to ear rots and grain mycotoxin contamination caused by Fusarium spp. in maize; Springer; Euphytica; 178; 1; 3-2011; 23-29
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