Resistance of Brazilian wheat cultivars to blast under controlled condition

Detalhes bibliográficos
Autor(a) principal: Maciel,João Leodato Nunes
Data de Publicação: 2022
Outros Autores: Santos,Gustavo Bilíbio dos, Pizolotto,Carlos Augusto, Kovaleski,Marcos, Silva,Alieze Nascimento da, Deuner,Carolina Cardoso, Costa,Ivan Francisco Dressler da
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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spelling 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
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repository.mail.fl_str_mv
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