Characterization of Alternaria isolates and reaction of potato genotypes to early blight

Detalhes bibliográficos
Autor(a) principal: Alvarenga, Thayssa Vilela Miguel
Data de Publicação: 2016
Outros Autores: Ribeiro, Silvia Regina Rodrigues de Paula, Souza, Elaine Aparecida de, Pereira, Francielly de Cássia, Pinto, César Augusto Brasil Pereira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/29457
Resumo: Early blight is one of the most important fungal diseases of potato. The objective of this study was to evaluate the in vitro reaction of potato genotypes to the severity of early blight and compare the species Alternaria solani and Alternaria grandis , etiologic agents of disease, through the evaluation of physiological characteristics. Twenty-two genotypes of the Potato Breeding Program at UFLA, two cultivars, Aracy and Bintje, patterns of resistance and susceptibility, respectively were evaluated. For inoculation, three isolates of A. grandis and two isolates of A. solani were used. Plantlets obtained in vitro were inoculated with a 5mm diameter mycelial disk of isolates Alternaria spp. of. These were incubated in severity and classified according to the rating scale. Isolates of Alternaria spp. were evaluated for mycelial growth index (MGI) and for formation of mycelial compatibility groups (MCG). The methodology for evaluating the in vitro reaction of genotypes to severity of early blight was efficient for both isolates. The isolates of A. solani and A. grandis were similar in their aggressiveness. The isolates of A. grandis MGI's had higher, and therefore mycelium grew faster when compared to those isolated from A. solani . The occurrence of mycelial compatibility among isolates of A. solani and A. grandis indicated the possible occurrence of parasexual cycle.
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spelling Characterization of Alternaria isolates and reaction of potato genotypes to early blightCaracterização de isolados de Alternaria e reação de genótipos de batata à pinta pretaAlternaria grandisAlternaria solaniMycelial compatibilityPotato - BreedingPotatoe - Early blightCompatibilidade micelialBatata - Melhoramento genéticoBatata - Pinta pretaEarly blight is one of the most important fungal diseases of potato. The objective of this study was to evaluate the in vitro reaction of potato genotypes to the severity of early blight and compare the species Alternaria solani and Alternaria grandis , etiologic agents of disease, through the evaluation of physiological characteristics. Twenty-two genotypes of the Potato Breeding Program at UFLA, two cultivars, Aracy and Bintje, patterns of resistance and susceptibility, respectively were evaluated. For inoculation, three isolates of A. grandis and two isolates of A. solani were used. Plantlets obtained in vitro were inoculated with a 5mm diameter mycelial disk of isolates Alternaria spp. of. These were incubated in severity and classified according to the rating scale. Isolates of Alternaria spp. were evaluated for mycelial growth index (MGI) and for formation of mycelial compatibility groups (MCG). The methodology for evaluating the in vitro reaction of genotypes to severity of early blight was efficient for both isolates. The isolates of A. solani and A. grandis were similar in their aggressiveness. The isolates of A. grandis MGI's had higher, and therefore mycelium grew faster when compared to those isolated from A. solani . The occurrence of mycelial compatibility among isolates of A. solani and A. grandis indicated the possible occurrence of parasexual cycle.A pinta preta é uma das doenças fúngicas mais importantes da cultura da batata. O objetivo deste trabalho foi avaliar, in vitro, a reação de genótipos de batata à pinta-preta e comparar as espécies Alternaria grandis e Alternaria solani , por meio da avaliação de características fisiológicas. Foram avaliados 22 genótipos do Programa de Melhoramento Genético de Batata da UFLA, sendo duas cultivares, padrões de resistência e suscetibilidade. Foram inoculados três isolados de A. grandis e dois de A. solani . As plântulas, obtidas in vitro, foram inoculadas com os isolados de Alternaria spp., incubadas e classificadas quanto à severidade. Os isolados de Alternaria spp. foram avaliados quanto ao índice de velocidade de crescimento micelial (IVCM) e a formação de grupos de compatibilidade micelial (GCM). A metodologia de avaliação precoce in vitro da reação dos genótipos à severidade da pinta-preta foi eficiente para os isolados de ambas as espécies de Alternaria . Os isolados de A. grandis e A. solani apresentaram comportamento semelhante quanto à agressividade. Os isolados de A. grandis apresentaram IVCMs superiores e, portanto, crescimento micelial mais rápido. A ocorrência de compatibilidade micelial entre isolados de A. grandis e A. solani indica a possibilidade de ocorrência do ciclo parassexual.Universidade Federal de Santa Maria2018-06-15T19:32:46Z2018-06-15T19:32:46Z2016-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfALVARENGA, T. V. M. et al. Characterization of Alternaria isolates and reaction of potato genotypes to early blight. Ciência Rural, Santa Maria, v. 46, n. 10, p. 1783-1789, Oct. 2016.http://repositorio.ufla.br/jspui/handle/1/29457Ciência Ruralreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessAlvarenga, Thayssa Vilela MiguelRibeiro, Silvia Regina Rodrigues de PaulaSouza, Elaine Aparecida dePereira, Francielly de CássiaPinto, César Augusto Brasil Pereiraeng2023-05-30T17:23:28Zoai:localhost:1/29457Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2023-05-30T17:23:28Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Characterization of Alternaria isolates and reaction of potato genotypes to early blight
Caracterização de isolados de Alternaria e reação de genótipos de batata à pinta preta
title Characterization of Alternaria isolates and reaction of potato genotypes to early blight
spellingShingle Characterization of Alternaria isolates and reaction of potato genotypes to early blight
Alvarenga, Thayssa Vilela Miguel
Alternaria grandis
Alternaria solani
Mycelial compatibility
Potato - Breeding
Potatoe - Early blight
Compatibilidade micelial
Batata - Melhoramento genético
Batata - Pinta preta
title_short Characterization of Alternaria isolates and reaction of potato genotypes to early blight
title_full Characterization of Alternaria isolates and reaction of potato genotypes to early blight
title_fullStr Characterization of Alternaria isolates and reaction of potato genotypes to early blight
title_full_unstemmed Characterization of Alternaria isolates and reaction of potato genotypes to early blight
title_sort Characterization of Alternaria isolates and reaction of potato genotypes to early blight
author Alvarenga, Thayssa Vilela Miguel
author_facet Alvarenga, Thayssa Vilela Miguel
Ribeiro, Silvia Regina Rodrigues de Paula
Souza, Elaine Aparecida de
Pereira, Francielly de Cássia
Pinto, César Augusto Brasil Pereira
author_role author
author2 Ribeiro, Silvia Regina Rodrigues de Paula
Souza, Elaine Aparecida de
Pereira, Francielly de Cássia
Pinto, César Augusto Brasil Pereira
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Alvarenga, Thayssa Vilela Miguel
Ribeiro, Silvia Regina Rodrigues de Paula
Souza, Elaine Aparecida de
Pereira, Francielly de Cássia
Pinto, César Augusto Brasil Pereira
dc.subject.por.fl_str_mv Alternaria grandis
Alternaria solani
Mycelial compatibility
Potato - Breeding
Potatoe - Early blight
Compatibilidade micelial
Batata - Melhoramento genético
Batata - Pinta preta
topic Alternaria grandis
Alternaria solani
Mycelial compatibility
Potato - Breeding
Potatoe - Early blight
Compatibilidade micelial
Batata - Melhoramento genético
Batata - Pinta preta
description Early blight is one of the most important fungal diseases of potato. The objective of this study was to evaluate the in vitro reaction of potato genotypes to the severity of early blight and compare the species Alternaria solani and Alternaria grandis , etiologic agents of disease, through the evaluation of physiological characteristics. Twenty-two genotypes of the Potato Breeding Program at UFLA, two cultivars, Aracy and Bintje, patterns of resistance and susceptibility, respectively were evaluated. For inoculation, three isolates of A. grandis and two isolates of A. solani were used. Plantlets obtained in vitro were inoculated with a 5mm diameter mycelial disk of isolates Alternaria spp. of. These were incubated in severity and classified according to the rating scale. Isolates of Alternaria spp. were evaluated for mycelial growth index (MGI) and for formation of mycelial compatibility groups (MCG). The methodology for evaluating the in vitro reaction of genotypes to severity of early blight was efficient for both isolates. The isolates of A. solani and A. grandis were similar in their aggressiveness. The isolates of A. grandis MGI's had higher, and therefore mycelium grew faster when compared to those isolated from A. solani . The occurrence of mycelial compatibility among isolates of A. solani and A. grandis indicated the possible occurrence of parasexual cycle.
publishDate 2016
dc.date.none.fl_str_mv 2016-10
2018-06-15T19:32:46Z
2018-06-15T19:32:46Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv ALVARENGA, T. V. M. et al. Characterization of Alternaria isolates and reaction of potato genotypes to early blight. Ciência Rural, Santa Maria, v. 46, n. 10, p. 1783-1789, Oct. 2016.
http://repositorio.ufla.br/jspui/handle/1/29457
identifier_str_mv ALVARENGA, T. V. M. et al. Characterization of Alternaria isolates and reaction of potato genotypes to early blight. Ciência Rural, Santa Maria, v. 46, n. 10, p. 1783-1789, Oct. 2016.
url http://repositorio.ufla.br/jspui/handle/1/29457
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
publisher.none.fl_str_mv Universidade Federal de Santa Maria
dc.source.none.fl_str_mv Ciência Rural
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
_version_ 1807835153681088512

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