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

Autores
Navarro, Barbara Ludwig; Ramos Romero, Lucia; 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.
Fil: Navarro, Barbara Ludwig. Universität Göttingen; Alemania
Fil: Ramos Romero, Lucia. Universität Göttingen; Alemania. The New Zealand Institute for Plant and Food Research Limited; Nueva Zelanda
Fil: Kistner, María Belén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Buenos Aires Norte. Estacion Experimental Agropecuaria Pergamino. Agencia de Extension Rural 25 de Mayo.; Argentina
Fil: Iglesias, Juliana. Universidad Nacional del Noroeste de la Provincia de Buenos Aires; Argentina. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Buenos Aires Norte. Estacion Experimental Agropecuaria Pergamino. Agencia de Extension Rural 25 de Mayo.; Argentina
Fil: Von Tiedemann, Andreas. Universität Göttingen; Alemania
Materia
NORTHERN CORN LEAF BLIGHT
PATHOGEN POPULATION
QUALITATIVE RESISTANCE
R GENES
RACE DIVERSITY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/155219
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and BrazilNavarro, Barbara LudwigRamos Romero, LuciaKistner, María BelénIglesias, JulianaVon Tiedemann, AndreasNORTHERN CORN LEAF BLIGHTPATHOGEN POPULATIONQUALITATIVE RESISTANCER GENESRACE DIVERSITYhttps://purl.org/becyt/ford/1.7https://purl.org/becyt/ford/1Northern 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.Fil: Navarro, Barbara Ludwig. Universität Göttingen; AlemaniaFil: Ramos Romero, Lucia. Universität Göttingen; Alemania. The New Zealand Institute for Plant and Food Research Limited; Nueva ZelandaFil: Kistner, María Belén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Buenos Aires Norte. Estacion Experimental Agropecuaria Pergamino. Agencia de Extension Rural 25 de Mayo.; ArgentinaFil: Iglesias, Juliana. Universidad Nacional del Noroeste de la Provincia de Buenos Aires; Argentina. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Buenos Aires Norte. Estacion Experimental Agropecuaria Pergamino. Agencia de Extension Rural 25 de Mayo.; ArgentinaFil: Von Tiedemann, Andreas. Universität Göttingen; AlemaniaSociedade Brasileira de Fitopatologia2021-02-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/155219Navarro, Barbara Ludwig; Ramos Romero, Lucia; Kistner, María Belén; Iglesias, Juliana; Von Tiedemann, Andreas; Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil; Sociedade Brasileira de Fitopatologia; Tropical Plant Pathology; 46; 23-2-2021; 371–3801982-56761983-2052CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1007/s40858-020-00417-xinfo:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s40858-020-00417-xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:23:01Zoai:ri.conicet.gov.ar:11336/155219instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:23:01.96CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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
NORTHERN CORN LEAF BLIGHT
PATHOGEN POPULATION
QUALITATIVE RESISTANCE
R GENES
RACE DIVERSITY
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, Lucia
Kistner, María Belén
Iglesias, Juliana
Von Tiedemann, Andreas
author Navarro, Barbara Ludwig
author_facet Navarro, Barbara Ludwig
Ramos Romero, Lucia
Kistner, María Belén
Iglesias, Juliana
Von Tiedemann, Andreas
author_role author
author2 Ramos Romero, Lucia
Kistner, María Belén
Iglesias, Juliana
Von Tiedemann, Andreas
author2_role author
author
author
author
dc.subject.none.fl_str_mv NORTHERN CORN LEAF BLIGHT
PATHOGEN POPULATION
QUALITATIVE RESISTANCE
R GENES
RACE DIVERSITY
topic NORTHERN CORN LEAF BLIGHT
PATHOGEN POPULATION
QUALITATIVE RESISTANCE
R GENES
RACE DIVERSITY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.7
https://purl.org/becyt/ford/1
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.
Fil: Navarro, Barbara Ludwig. Universität Göttingen; Alemania
Fil: Ramos Romero, Lucia. Universität Göttingen; Alemania. The New Zealand Institute for Plant and Food Research Limited; Nueva Zelanda
Fil: Kistner, María Belén. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Buenos Aires Norte. Estacion Experimental Agropecuaria Pergamino. Agencia de Extension Rural 25 de Mayo.; Argentina
Fil: Iglesias, Juliana. Universidad Nacional del Noroeste de la Provincia de Buenos Aires; Argentina. Instituto Nacional de Tecnologia Agropecuaria. Centro Regional Buenos Aires Norte. Estacion Experimental Agropecuaria Pergamino. Agencia de Extension Rural 25 de Mayo.; Argentina
Fil: Von Tiedemann, Andreas. Universität Göttingen; 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 2021-02-23
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/11336/155219
Navarro, Barbara Ludwig; Ramos Romero, Lucia; Kistner, María Belén; Iglesias, Juliana; Von Tiedemann, Andreas; Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil; Sociedade Brasileira de Fitopatologia; Tropical Plant Pathology; 46; 23-2-2021; 371–380
1982-5676
1983-2052
CONICET Digital
CONICET
url http://hdl.handle.net/11336/155219
identifier_str_mv Navarro, Barbara Ludwig; Ramos Romero, Lucia; Kistner, María Belén; Iglesias, Juliana; Von Tiedemann, Andreas; Assessment of physiological races of Exserohilum turcicum isolates from maize in Argentina and Brazil; Sociedade Brasileira de Fitopatologia; Tropical Plant Pathology; 46; 23-2-2021; 371–380
1982-5676
1983-2052
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1007/s40858-020-00417-x
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s40858-020-00417-x
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Sociedade Brasileira de Fitopatologia
publisher.none.fl_str_mv Sociedade Brasileira de Fitopatologia
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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