Characterization of Alternaria isolates and reaction of potato genotypes to early blight
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001783 |
Resumo: | ABSTRACT: 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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Characterization of Alternaria isolates and reaction of potato genotypes to early blightAlternaria grandisAlternaria solanimycelial compatibilityaggressivenessgenetic resistance.ABSTRACT: 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.Universidade Federal de Santa Maria2016-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001783Ciência Rural v.46 n.10 2016reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20151447info:eu-repo/semantics/openAccessAlvarenga,Thayssa Vilela MiguelRibeiro,Silvia Regina Rodrigues de PaulaSouza,Elaine Aparecida dePereira,Francielly de CássiaPinto,César Augusto Brasil Pereiraeng2016-10-20T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Characterization of Alternaria isolates and reaction of potato genotypes to early blight |
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 aggressiveness genetic resistance. |
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 aggressiveness genetic resistance. |
topic |
Alternaria grandis Alternaria solani mycelial compatibility aggressiveness genetic resistance. |
description |
ABSTRACT: 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 |
2016-10-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001783 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016001001783 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20151447 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
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 v.46 n.10 2016 reponame:Ciência Rural instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Rural |
collection |
Ciência Rural |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1749140550509920256 |