Resistance of Brazilian wheat cultivars to blast under controlled condition
Autor(a) principal: | |
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Data de Publicação: | 2022 |
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=S0103-84782022000700152 |
Resumo: | ABSTRACT: The first report of wheat blast in the world was in Brazil, in 1986. Since then, a great effort has been made towards the development of wheat cultivars resistant to this disease, which is caused by the fungus Pyricularia oryzae Triticum (PoT). The objective of this research was to (i) evaluate the resistance of wheat genotypes to blast and (ii) verify the correlation between disease severity on wheat spikes and sporulation rate of PoT on spike rachises. Plants of 40 cultivars grown in pots, at the flowering stage (stage 65 on the Zadoks scale), were inoculated with a suspension of conidia of a PoT isolate representative of the main variant of the fungus reported in Brazil. Severity of blast on the spikes at 5 and 7 days after inoculation (dai) and the rate of sporulation of the fungus on the rachis (conidia per g of rachis) were evaluated. Eighty percent of the cultivars that were classified in the group with the lowest sporulation rate were also classified in the group with the highest resistance at 7 dai. However, the correlation coefficients of the analysis established between the cultivar severity at 5 and 7 dai averages and the PoT sporulation rate averages were not significant (r=0.2464 and r=0.2047, respectively). Results obtained represent the updated characterization to blast of wheat cultivars in Brazil and constitute an important exploratory framework for the evaluation of the reaction of wheat genotypes based on the sporulation rate of PoT on their tissues. |
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Resistance of Brazilian wheat cultivars to blast under controlled conditionPyricularia oryzae TriticumseveritysporulationABSTRACT: The first report of wheat blast in the world was in Brazil, in 1986. Since then, a great effort has been made towards the development of wheat cultivars resistant to this disease, which is caused by the fungus Pyricularia oryzae Triticum (PoT). The objective of this research was to (i) evaluate the resistance of wheat genotypes to blast and (ii) verify the correlation between disease severity on wheat spikes and sporulation rate of PoT on spike rachises. Plants of 40 cultivars grown in pots, at the flowering stage (stage 65 on the Zadoks scale), were inoculated with a suspension of conidia of a PoT isolate representative of the main variant of the fungus reported in Brazil. Severity of blast on the spikes at 5 and 7 days after inoculation (dai) and the rate of sporulation of the fungus on the rachis (conidia per g of rachis) were evaluated. Eighty percent of the cultivars that were classified in the group with the lowest sporulation rate were also classified in the group with the highest resistance at 7 dai. However, the correlation coefficients of the analysis established between the cultivar severity at 5 and 7 dai averages and the PoT sporulation rate averages were not significant (r=0.2464 and r=0.2047, respectively). Results obtained represent the updated characterization to blast of wheat cultivars in Brazil and constitute an important exploratory framework for the evaluation of the reaction of wheat genotypes based on the sporulation rate of PoT on their tissues.Universidade Federal de Santa Maria2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000700152Ciência Rural v.52 n.7 2022reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20210417info:eu-repo/semantics/openAccessMaciel,João Leodato NunesSantos,Gustavo Bilíbio dosPizolotto,Carlos AugustoKovaleski,MarcosSilva,Alieze Nascimento daDeuner,Carolina CardosoCosta,Ivan Francisco Dressler daeng2021-11-24T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Resistance of Brazilian wheat cultivars to blast under controlled condition |
title |
Resistance of Brazilian wheat cultivars to blast under controlled condition |
spellingShingle |
Resistance of Brazilian wheat cultivars to blast under controlled condition Maciel,João Leodato Nunes Pyricularia oryzae Triticum severity sporulation |
title_short |
Resistance of Brazilian wheat cultivars to blast under controlled condition |
title_full |
Resistance of Brazilian wheat cultivars to blast under controlled condition |
title_fullStr |
Resistance of Brazilian wheat cultivars to blast under controlled condition |
title_full_unstemmed |
Resistance of Brazilian wheat cultivars to blast under controlled condition |
title_sort |
Resistance of Brazilian wheat cultivars to blast under controlled condition |
author |
Maciel,João Leodato Nunes |
author_facet |
Maciel,João Leodato Nunes Santos,Gustavo Bilíbio dos Pizolotto,Carlos Augusto Kovaleski,Marcos Silva,Alieze Nascimento da Deuner,Carolina Cardoso Costa,Ivan Francisco Dressler da |
author_role |
author |
author2 |
Santos,Gustavo Bilíbio dos Pizolotto,Carlos Augusto Kovaleski,Marcos Silva,Alieze Nascimento da Deuner,Carolina Cardoso Costa,Ivan Francisco Dressler da |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Maciel,João Leodato Nunes Santos,Gustavo Bilíbio dos Pizolotto,Carlos Augusto Kovaleski,Marcos Silva,Alieze Nascimento da Deuner,Carolina Cardoso Costa,Ivan Francisco Dressler da |
dc.subject.por.fl_str_mv |
Pyricularia oryzae Triticum severity sporulation |
topic |
Pyricularia oryzae Triticum severity sporulation |
description |
ABSTRACT: The first report of wheat blast in the world was in Brazil, in 1986. Since then, a great effort has been made towards the development of wheat cultivars resistant to this disease, which is caused by the fungus Pyricularia oryzae Triticum (PoT). The objective of this research was to (i) evaluate the resistance of wheat genotypes to blast and (ii) verify the correlation between disease severity on wheat spikes and sporulation rate of PoT on spike rachises. Plants of 40 cultivars grown in pots, at the flowering stage (stage 65 on the Zadoks scale), were inoculated with a suspension of conidia of a PoT isolate representative of the main variant of the fungus reported in Brazil. Severity of blast on the spikes at 5 and 7 days after inoculation (dai) and the rate of sporulation of the fungus on the rachis (conidia per g of rachis) were evaluated. Eighty percent of the cultivars that were classified in the group with the lowest sporulation rate were also classified in the group with the highest resistance at 7 dai. However, the correlation coefficients of the analysis established between the cultivar severity at 5 and 7 dai averages and the PoT sporulation rate averages were not significant (r=0.2464 and r=0.2047, respectively). Results obtained represent the updated characterization to blast of wheat cultivars in Brazil and constitute an important exploratory framework for the evaluation of the reaction of wheat genotypes based on the sporulation rate of PoT on their tissues. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
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=S0103-84782022000700152 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000700152 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20210417 |
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.52 n.7 2022 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_ |
1749140556951322624 |