Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil

Autores
Navarro, Barbara Ludwig; Ramos Romero, Lucía; Kistner, María Belén; Iglesias, Juliana; Von Tiedemann, Andreas
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Northern corn leaf blight (NCLB) is one of the most important diseases in maize worldwide. It is caused by the fungus Exserohilum turcicum, which exhibits a high genetic variability for virulence, and hence physiological races have been reported. Disease control is based mainly on fungicide application and host resistance. Qualitative resistance has been widely used to control NCLB through the deployment of Ht genes. Known pathogen races are designated according to their virulence to the corresponding Ht gene. Knowledge about of E. turcicum race distribution in maize-producing areas is essential to develop and exploit resistant genotypes. Maize leaves showing distinct elliptical grey-green lesions were collected from maize-producing areas of Argentina and Brazil, and 184 monosporic E. turcicum isolates were obtained. A total of 66 isolates were collected from Argentina during 2015, 2018 and 2019, while 118 isolates from Brazil were collected during 2017, 2018 and 2019. All isolates were screened on maize differential lines containing Ht1, Ht2, Ht3 and Htn1 resistance genes. In greenhouse experiments, inoculated maize plants were evaluated at 14 days after inoculation. Resistance reaction was characterized by chlorosis, and susceptibility was defined by necrosis in the absence of chlorosis. The most frequent race was 0 in both Argentina (83%) and Brazil (65%). Frequencies of race 1 (6% and 24%) and race 23N (5% and 10%) were very low in Argentina and Brazil, respectively. The high frequency of race 0 isolates provides evidence that qualitative resistance based on the tested Ht genes is not being used extensively in Argentina and Brazil to control NCLB. This information may be relevant for growers and breeding programs as the incidence of NCLB is increasing in both countries.
EEA Pergamino
Fil: Navarro, Barbara Ludwig. Georg-August-Universität Göttingen. Division of Plant Pathology and Crop Protection. Department of Crop Sciences; Alemania
Fil: Ramos Romero, Lucía. Georg-August-Universität Göttingen. Division of Plant Pathology and Crop Protection. Department of Crop Sciences; Alemania
Fil: Ramos Romero, Lucía. The New Zealand Institute for Plant and Food Research Limited; Nueva Zelanda
Fil: Kistner, María Belén. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Departamento de Maíz; Argentina
Fil: Kistner, María Belén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Iglesias, Juliana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Departamento de Maíz; Argentina.
Fil: Iglesias, Juliana. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Escuela de Agrarias, Naturales y Ambientales; Argentina
Fil: Von Tiedemann, Andreas. Georg-August-Universität Göttingen. Division of Plant Pathology and Crop Protection. Department of Crop Sciences; Alemania
Fuente
Tropical Plant Pathology 46 : 1-10. (February 2021)
Materia
Maíz
Control de Enfermedades de Plantas
Exserohilum
Fungicidas
Argentina
Brasil
Tizón
Resistencia a la Enfermedad
Genes
Maize
Plant Disease Control
Fungicides
Brazil
Blight
Disease Resistance
Población Patógena
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/9049
Acceder
id INTADig_bc74eb68df888bd614b3437a5eb776c9
oai_identifier_str oai:localhost:20.500.12123/9049
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and BrazilNavarro, Barbara LudwigRamos Romero, LucíaKistner, María BelénIglesias, JulianaVon Tiedemann, AndreasMaízControl de Enfermedades de PlantasExserohilumFungicidasArgentinaBrasilTizónResistencia a la EnfermedadGenesMaizePlant Disease ControlFungicidesBrazilBlightDisease ResistancePoblación PatógenaNorthern corn leaf blight (NCLB) is one of the most important diseases in maize worldwide. It is caused by the fungus Exserohilum turcicum, which exhibits a high genetic variability for virulence, and hence physiological races have been reported. Disease control is based mainly on fungicide application and host resistance. Qualitative resistance has been widely used to control NCLB through the deployment of Ht genes. Known pathogen races are designated according to their virulence to the corresponding Ht gene. Knowledge about of E. turcicum race distribution in maize-producing areas is essential to develop and exploit resistant genotypes. Maize leaves showing distinct elliptical grey-green lesions were collected from maize-producing areas of Argentina and Brazil, and 184 monosporic E. turcicum isolates were obtained. A total of 66 isolates were collected from Argentina during 2015, 2018 and 2019, while 118 isolates from Brazil were collected during 2017, 2018 and 2019. All isolates were screened on maize differential lines containing Ht1, Ht2, Ht3 and Htn1 resistance genes. In greenhouse experiments, inoculated maize plants were evaluated at 14 days after inoculation. Resistance reaction was characterized by chlorosis, and susceptibility was defined by necrosis in the absence of chlorosis. The most frequent race was 0 in both Argentina (83%) and Brazil (65%). Frequencies of race 1 (6% and 24%) and race 23N (5% and 10%) were very low in Argentina and Brazil, respectively. The high frequency of race 0 isolates provides evidence that qualitative resistance based on the tested Ht genes is not being used extensively in Argentina and Brazil to control NCLB. This information may be relevant for growers and breeding programs as the incidence of NCLB is increasing in both countries.EEA PergaminoFil: Navarro, Barbara Ludwig. Georg-August-Universität Göttingen. Division of Plant Pathology and Crop Protection. Department of Crop Sciences; AlemaniaFil: Ramos Romero, Lucía. Georg-August-Universität Göttingen. Division of Plant Pathology and Crop Protection. Department of Crop Sciences; AlemaniaFil: Ramos Romero, Lucía. The New Zealand Institute for Plant and Food Research Limited; Nueva ZelandaFil: Kistner, María Belén. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Departamento de Maíz; ArgentinaFil: Kistner, María Belén. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Iglesias, Juliana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Departamento de Maíz; Argentina.Fil: Iglesias, Juliana. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Escuela de Agrarias, Naturales y Ambientales; ArgentinaFil: Von Tiedemann, Andreas. Georg-August-Universität Göttingen. Division of Plant Pathology and Crop Protection. Department of Crop Sciences; AlemaniaSpringer2021-04-08T15:48:09Z2021-04-08T15:48:09Z2021-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/9049https://link.springer.com/article/10.1007/s40858-020-00417-x1983-2052 (online)https://doi.org/10.1007/s40858-020-00417-xTropical Plant Pathology 46 : 1-10. (February 2021)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repograntAgreement/INTA/2019-PD-E4-I090-001/2019-PD-E4-I090-001/AR./Análisis de patosistemas en cultivos agrícolas y especies forestales. Caracterización de sus componentesinfo:eu-repograntAgreement/INTA/2019-PE-E6-I128-001/2019-PE-E6-I128-001/AR./Mejoramiento genético de maíz y sorgoinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-29T13:45:10Zoai:localhost:20.500.12123/9049instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:45:11.097INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil
title Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil
spellingShingle Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil
Navarro, Barbara Ludwig
Maíz
Control de Enfermedades de Plantas
Exserohilum
Fungicidas
Argentina
Brasil
Tizón
Resistencia a la Enfermedad
Genes
Maize
Plant Disease Control
Fungicides
Brazil
Blight
Disease Resistance
Población Patógena
title_short Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil
title_full Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil
title_fullStr Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil
title_full_unstemmed Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil
title_sort Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil
dc.creator.none.fl_str_mv Navarro, Barbara Ludwig
Ramos Romero, Lucía
Kistner, María Belén
Iglesias, Juliana
Von Tiedemann, Andreas
author Navarro, Barbara Ludwig
author_facet Navarro, Barbara Ludwig
Ramos Romero, Lucía
Kistner, María Belén
Iglesias, Juliana
Von Tiedemann, Andreas
author_role author
author2 Ramos Romero, Lucía
Kistner, María Belén
Iglesias, Juliana
Von Tiedemann, Andreas
author2_role author
author
author
author
dc.subject.none.fl_str_mv Maíz
Control de Enfermedades de Plantas
Exserohilum
Fungicidas
Argentina
Brasil
Tizón
Resistencia a la Enfermedad
Genes
Maize
Plant Disease Control
Fungicides
Brazil
Blight
Disease Resistance
Población Patógena
topic Maíz
Control de Enfermedades de Plantas
Exserohilum
Fungicidas
Argentina
Brasil
Tizón
Resistencia a la Enfermedad
Genes
Maize
Plant Disease Control
Fungicides
Brazil
Blight
Disease Resistance
Población Patógena
dc.description.none.fl_txt_mv Northern corn leaf blight (NCLB) is one of the most important diseases in maize worldwide. It is caused by the fungus Exserohilum turcicum, which exhibits a high genetic variability for virulence, and hence physiological races have been reported. Disease control is based mainly on fungicide application and host resistance. Qualitative resistance has been widely used to control NCLB through the deployment of Ht genes. Known pathogen races are designated according to their virulence to the corresponding Ht gene. Knowledge about of E. turcicum race distribution in maize-producing areas is essential to develop and exploit resistant genotypes. Maize leaves showing distinct elliptical grey-green lesions were collected from maize-producing areas of Argentina and Brazil, and 184 monosporic E. turcicum isolates were obtained. A total of 66 isolates were collected from Argentina during 2015, 2018 and 2019, while 118 isolates from Brazil were collected during 2017, 2018 and 2019. All isolates were screened on maize differential lines containing Ht1, Ht2, Ht3 and Htn1 resistance genes. In greenhouse experiments, inoculated maize plants were evaluated at 14 days after inoculation. Resistance reaction was characterized by chlorosis, and susceptibility was defined by necrosis in the absence of chlorosis. The most frequent race was 0 in both Argentina (83%) and Brazil (65%). Frequencies of race 1 (6% and 24%) and race 23N (5% and 10%) were very low in Argentina and Brazil, respectively. The high frequency of race 0 isolates provides evidence that qualitative resistance based on the tested Ht genes is not being used extensively in Argentina and Brazil to control NCLB. This information may be relevant for growers and breeding programs as the incidence of NCLB is increasing in both countries.
EEA Pergamino
Fil: Navarro, Barbara Ludwig. Georg-August-Universität Göttingen. Division of Plant Pathology and Crop Protection. Department of Crop Sciences; Alemania
Fil: Ramos Romero, Lucía. Georg-August-Universität Göttingen. Division of Plant Pathology and Crop Protection. Department of Crop Sciences; Alemania
Fil: Ramos Romero, Lucía. The New Zealand Institute for Plant and Food Research Limited; Nueva Zelanda
Fil: Kistner, María Belén. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Departamento de Maíz; Argentina
Fil: Kistner, María Belén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Iglesias, Juliana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Departamento de Maíz; Argentina.
Fil: Iglesias, Juliana. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Escuela de Agrarias, Naturales y Ambientales; Argentina
Fil: Von Tiedemann, Andreas. Georg-August-Universität Göttingen. Division of Plant Pathology and Crop Protection. Department of Crop Sciences; Alemania
description Northern corn leaf blight (NCLB) is one of the most important diseases in maize worldwide. It is caused by the fungus Exserohilum turcicum, which exhibits a high genetic variability for virulence, and hence physiological races have been reported. Disease control is based mainly on fungicide application and host resistance. Qualitative resistance has been widely used to control NCLB through the deployment of Ht genes. Known pathogen races are designated according to their virulence to the corresponding Ht gene. Knowledge about of E. turcicum race distribution in maize-producing areas is essential to develop and exploit resistant genotypes. Maize leaves showing distinct elliptical grey-green lesions were collected from maize-producing areas of Argentina and Brazil, and 184 monosporic E. turcicum isolates were obtained. A total of 66 isolates were collected from Argentina during 2015, 2018 and 2019, while 118 isolates from Brazil were collected during 2017, 2018 and 2019. All isolates were screened on maize differential lines containing Ht1, Ht2, Ht3 and Htn1 resistance genes. In greenhouse experiments, inoculated maize plants were evaluated at 14 days after inoculation. Resistance reaction was characterized by chlorosis, and susceptibility was defined by necrosis in the absence of chlorosis. The most frequent race was 0 in both Argentina (83%) and Brazil (65%). Frequencies of race 1 (6% and 24%) and race 23N (5% and 10%) were very low in Argentina and Brazil, respectively. The high frequency of race 0 isolates provides evidence that qualitative resistance based on the tested Ht genes is not being used extensively in Argentina and Brazil to control NCLB. This information may be relevant for growers and breeding programs as the incidence of NCLB is increasing in both countries.
publishDate 2021
dc.date.none.fl_str_mv 2021-04-08T15:48:09Z
2021-04-08T15:48:09Z
2021-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/9049
https://link.springer.com/article/10.1007/s40858-020-00417-x
1983-2052 (online)
https://doi.org/10.1007/s40858-020-00417-x
url http://hdl.handle.net/20.500.12123/9049
https://link.springer.com/article/10.1007/s40858-020-00417-x
https://doi.org/10.1007/s40858-020-00417-x
identifier_str_mv 1983-2052 (online)
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repograntAgreement/INTA/2019-PD-E4-I090-001/2019-PD-E4-I090-001/AR./Análisis de patosistemas en cultivos agrícolas y especies forestales. Caracterización de sus componentes
info:eu-repograntAgreement/INTA/2019-PE-E6-I128-001/2019-PE-E6-I128-001/AR./Mejoramiento genético de maíz y sorgo
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv Tropical Plant Pathology 46 : 1-10. (February 2021)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.559606

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