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In vitro selection for resistance to Septoria tritici in wheat

By: Harrabi, M | Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico).
Contributor(s): Amara, H [coaut.] | Cherif, M [coaut.] | Daaloul, A [coaut.] | Ennaiffer, Z [coaut.] | Gilchrist, L.|Ginkel, M. van|McNab, A.|Kema, G.H.J [eds.].
Material type: materialTypeLabelBookAnalytics: Show analyticsPublisher: Mexico, DF (Mexico) CIMMYT : 1995ISBN: 968-6923-49-7.Subject(s): Crossbreeding | Disease resistance | Genetic inheritance | Hexaploidy AGROVOC | Mycosphaerella graminicola | Plant diseases | Septoria | Triticum aestivum AGROVOCDDC classification: 633.1194 Summary: Adult resistance to Septoria tritici was evaluated in the field on three and eleven local bread and durum wheat varieties, respectively. Based on LSD (1 percent) value, the fourteen genotypes were classified in five groups. Jeneh Khotifa seemed to have a excellent resistance, whereas DB 33-35 and Karim showed the highest susceptible reactions. All the three bread wheat genotypes had an acceptable level of Septoria tritici resistance. Wheat callus from three durum and two bread wheat genotypes were exposed in vitro to four concentrations of Septoria tritici crude toxin. The increase in fresh weight was recorded for 120 days of incubation in selective medium. For the five genotypes, losses in fresh weight increased with toxin concentration. However the reaction of genotypes according to toxin concentration differed from one variety to another. Cell response in the toxic medium was not in perfectly accordance with that of adult plants.|La resistencia a Septoria tritici en planta adulta fue evaluada en el campo en tres y once variedades locales de trigos harineros y duros respectivamente. Basado en el valor de LSD (1 porciento), los 14 genotipos fueron clasificados en 5 grupos. Jeneh Kotifa parece tener una resistencia excelente mientras que DB 33- 35 y Karim mostraron las reacciones mas suceptibles. Los tres genotipos de trigo harinero tuvieron un nivel de resistencia aceptable a Septoria tritici. Los callos de tres genotipos de trigo duro y dos de trigo harinero fueron expuestos in vitro a cuatro concentraciones de extracto crudo de la toxina de Septoria tritici. El incremento en peso fresco fue registrado a los 120 dias de incubacion en medio selectivo. Para los cinco genotipos, las perdidas en peso fresco aumentaron con la concentracion de toxina. Sin embargo la reaccion de los genotipos difirio de una variedad a otra de acuerdo a la concentracion de la toxina. La respuesta de la celula en el medio toxico no estuvo en perfecta concordancia con la de la planta adulta al hongo.Collection: CIMMYT Publications Collection
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Conference proceedings CIMMYT Knowledge Center: John Woolston Library

Lic. Jose Juan Caballero Flores

 

CIMMYT Publications Collection 633.1194 GIL (Browse shelf) 1 Available O623519
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Adult resistance to Septoria tritici was evaluated in the field on three and eleven local bread and durum wheat varieties, respectively. Based on LSD (1 percent) value, the fourteen genotypes were classified in five groups. Jeneh Khotifa seemed to have a excellent resistance, whereas DB 33-35 and Karim showed the highest susceptible reactions. All the three bread wheat genotypes had an acceptable level of Septoria tritici resistance. Wheat callus from three durum and two bread wheat genotypes were exposed in vitro to four concentrations of Septoria tritici crude toxin. The increase in fresh weight was recorded for 120 days of incubation in selective medium. For the five genotypes, losses in fresh weight increased with toxin concentration. However the reaction of genotypes according to toxin concentration differed from one variety to another. Cell response in the toxic medium was not in perfectly accordance with that of adult plants.|La resistencia a Septoria tritici en planta adulta fue evaluada en el campo en tres y once variedades locales de trigos harineros y duros respectivamente. Basado en el valor de LSD (1 porciento), los 14 genotipos fueron clasificados en 5 grupos. Jeneh Kotifa parece tener una resistencia excelente mientras que DB 33- 35 y Karim mostraron las reacciones mas suceptibles. Los tres genotipos de trigo harinero tuvieron un nivel de resistencia aceptable a Septoria tritici. Los callos de tres genotipos de trigo duro y dos de trigo harinero fueron expuestos in vitro a cuatro concentraciones de extracto crudo de la toxina de Septoria tritici. El incremento en peso fresco fue registrado a los 120 dias de incubacion en medio selectivo. Para los cinco genotipos, las perdidas en peso fresco aumentaron con la concentracion de toxina. Sin embargo la reaccion de los genotipos difirio de una variedad a otra de acuerdo a la concentracion de la toxina. La respuesta de la celula en el medio toxico no estuvo en perfecta concordancia con la de la planta adulta al hongo.

English

AGRIS 9602

CIMMYT Publications Collection

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Si tiene cualquier pregunta, contáctenos a CIMMYT-Knowledge-Center@cgiar.org