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Fusarium head blight in Argentina

By: De Galich, M.T.V | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Dubin, H.J.|Gilchrist, L.|Reeves, J.|McNab, A [eds.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 1997ISBN: 968-6923-94-2.Subject(s): Argentina | Blights | Breeding methods | Chemical control | Disease resistance | Epidemics | Fusarium | Germplasm | Pathogens | Soft wheat AGROVOC | Toxins | CIMMYT | Triticum | Genotypes AGROVOC | Plant breeding AGROVOCDDC classification: 632.4 Summary: During the last 50 years, 16 fusarium head blight (FHB) epidemics, mainly caused by Fusarium graminearum, have occurred in the central-north area of Argentina. Other known Fusarium species less pathogenic on wheat include F. equiseti, F. semitectum, F. poae, F. acuminatum, F. moniliforme, F. m. var. subglutinans, F. m. var. anthophilum, F. Oxysporum, and F. solani. Studies on the toxigenic capacity of isolated F. graminearum strains noted the abundance of deoxynivalenol (DON) producers, with a lesser proportion of nivalenol (NIV) producers. Some strains produced both DON and NIV. Zearalone (ZEA) was identified in more than half of the strains, and no relation was found between DON and NIV groups with regard to ZEA production. An integrated approach should be adopted to decrease FHB damage, taking into account the epidemiological characteristics of the pathogen, scarce genetic resistance in the host, and the strong environmental influence on FHB. Studies carried out at Marcos Juarez agricultural Experiment Station aim to develop germplasm with higher FHB resistance levels and good agronomic traits to be used as parents in the bread wheat breeding program. The methodology includes: 1) identification of resistance sources under semicontrolled conditions and artificial inoculation, and 2) incorporation of resistance into genotypes that have good agronomic traits. Despite some references suggesting that resistance is controlled by a few major genes / most indicate poligenic inheritance with additive effects and components of dominance. It may therefore be considered possible to obtain higher levels of resistance through a process of crossing and selection in order to accumulate resistance genes. To achieve this objective, a recurrent selection scheme with planned crosses combining parents of different origins is underway. Two cycles of combination are performed, alternating between selection for resistance under semicontrolled conditions and selection for agronomic traits in the field. To date, about 20 lines show resistance levels similar to the controls Sumai 3 and YMI #6 under test conditions.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 632.4 DUB (Browse shelf) 1 Available D624324
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During the last 50 years, 16 fusarium head blight (FHB) epidemics, mainly caused by Fusarium graminearum, have occurred in the central-north area of Argentina. Other known Fusarium species less pathogenic on wheat include F. equiseti, F. semitectum, F. poae, F. acuminatum, F. moniliforme, F. m. var. subglutinans, F. m. var. anthophilum, F. Oxysporum, and F. solani. Studies on the toxigenic capacity of isolated F. graminearum strains noted the abundance of deoxynivalenol (DON) producers, with a lesser proportion of nivalenol (NIV) producers. Some strains produced both DON and NIV. Zearalone (ZEA) was identified in more than half of the strains, and no relation was found between DON and NIV groups with regard to ZEA production. An integrated approach should be adopted to decrease FHB damage, taking into account the epidemiological characteristics of the pathogen, scarce genetic resistance in the host, and the strong environmental influence on FHB. Studies carried out at Marcos Juarez agricultural Experiment Station aim to develop germplasm with higher FHB resistance levels and good agronomic traits to be used as parents in the bread wheat breeding program. The methodology includes: 1) identification of resistance sources under semicontrolled conditions and artificial inoculation, and 2) incorporation of resistance into genotypes that have good agronomic traits. Despite some references suggesting that resistance is controlled by a few major genes / most indicate poligenic inheritance with additive effects and components of dominance. It may therefore be considered possible to obtain higher levels of resistance through a process of crossing and selection in order to accumulate resistance genes. To achieve this objective, a recurrent selection scheme with planned crosses combining parents of different origins is underway. Two cycles of combination are performed, alternating between selection for resistance under semicontrolled conditions and selection for agronomic traits in the field. To date, about 20 lines show resistance levels similar to the controls Sumai 3 and YMI #6 under test conditions.

English

9806|AGRIS 9802

Jose Juan Caballero

CIMMYT Publications Collection

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