Development of blast resistant somaclones of the upland rice cultivar Araguaia

Detalhes bibliográficos
Autor(a) principal: Araújo, Leila Garcês de
Data de Publicação: 2000
Outros Autores: Prabhu, Anne Sitarama, Freire, Adelson de Barros
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/5772
Resumo: The degree of blast resistance of upland rice (Oryza sativa L.) cultivar Araguaia has decreased over time causing significant yield losses. The major objective of this study was to obtain blast (Pyricularia grisea) resistant somaclones, adapting greenhouse and field selection procedures. Rice blast resistance and agronomic traits were assessed in R2 to R6 generations derived from regenerant plants (R1) from immature panicles of Araguaia. The evaluation and selection procedures include testing of early segregating populations and fixed lines in the advanced generations, under natural field conditions, and artificial inoculations in the greenhouse, with prevalent races IB-1 and IB-9 of P. grisea. Somaclones with both vertical resistance and slow blasting resistance were obtained. Twenty of 31 somaclones developed with a high degree of vertical resistance and fan shaped plant type maintained resistance in field and blast nursery tests in the R6 generation. Greenhouse selection with two specific physiologic races yielded 44 somaclones with slow blasting resistance, similar plant type and yield potential as that of Araguaia.
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spelling Development of blast resistant somaclones of the upland rice cultivar AraguaiaDesenvolvimento de somaclones da cultivar Araguaia resistentes à brusone em arroz de sequeiroOryza sativa; Pyricularia grisea; somaclonal variation; tissue cultureOryza sativa; Pyricularia grisea; variação somaclonal; cultura de tecidoThe degree of blast resistance of upland rice (Oryza sativa L.) cultivar Araguaia has decreased over time causing significant yield losses. The major objective of this study was to obtain blast (Pyricularia grisea) resistant somaclones, adapting greenhouse and field selection procedures. Rice blast resistance and agronomic traits were assessed in R2 to R6 generations derived from regenerant plants (R1) from immature panicles of Araguaia. The evaluation and selection procedures include testing of early segregating populations and fixed lines in the advanced generations, under natural field conditions, and artificial inoculations in the greenhouse, with prevalent races IB-1 and IB-9 of P. grisea. Somaclones with both vertical resistance and slow blasting resistance were obtained. Twenty of 31 somaclones developed with a high degree of vertical resistance and fan shaped plant type maintained resistance in field and blast nursery tests in the R6 generation. Greenhouse selection with two specific physiologic races yielded 44 somaclones with slow blasting resistance, similar plant type and yield potential as that of Araguaia.O grau de resistência à brusone da cultivar de arroz (Oryza sativa) Araguaia tem decrescido ao longo dos anos, resultando em prejuízos significativos na produtividade. O objetivo principal deste estudo foi obter somaclones resistentes à brusone (Pyricularia grisea), adaptando os métodos de seleção em casa de vegetação e de campo. Foram avaliadas plantas regeneradas (R1) de panículas imaturas da cultivar Araguaia nas gerações R2 a R6 para resistência à brusone e características agronômicas. O método de avaliação e seleção de plantas envolveu avaliações de populações segregantes e linhagens fixadas, em condições naturais de infecção no campo, e infecções artificiais em casa de vegetação com duas raças prevalecentes de P. grisea IB-1 e IB-9. Foram obtidos somaclones com resistência vertical e progresso lento de brusone. Vinte de 31 somaclones desenvolvidos com alto grau de resistência vertical e tipo de planta em leque apresentaram estabilidade da resistência no campo e nos viveiros de brusone na geração R6. No procedimento de seleção em casa de vegetação com duas raças específicas, foram obtidos 44 somaclones com progresso lento de brusone, as quais não diferiram da Araguaia quanto ao tipo de planta e potencial de produtividade.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraAraújo, Leila Garcês dePrabhu, Anne SitaramaFreire, Adelson de Barros2000-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5772Pesquisa Agropecuaria Brasileira; v.35, n.2, fev. 2000; 357-367Pesquisa Agropecuária Brasileira; v.35, n.2, fev. 2000; 357-3671678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/5772/2876info:eu-repo/semantics/openAccess2014-08-15T17:34:37Zoai:ojs.seer.sct.embrapa.br:article/5772Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-08-15T17:34:37Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Development of blast resistant somaclones of the upland rice cultivar Araguaia
Desenvolvimento de somaclones da cultivar Araguaia resistentes à brusone em arroz de sequeiro
title Development of blast resistant somaclones of the upland rice cultivar Araguaia
spellingShingle Development of blast resistant somaclones of the upland rice cultivar Araguaia
Araújo, Leila Garcês de
Oryza sativa; Pyricularia grisea; somaclonal variation; tissue culture
Oryza sativa; Pyricularia grisea; variação somaclonal; cultura de tecido
title_short Development of blast resistant somaclones of the upland rice cultivar Araguaia
title_full Development of blast resistant somaclones of the upland rice cultivar Araguaia
title_fullStr Development of blast resistant somaclones of the upland rice cultivar Araguaia
title_full_unstemmed Development of blast resistant somaclones of the upland rice cultivar Araguaia
title_sort Development of blast resistant somaclones of the upland rice cultivar Araguaia
author Araújo, Leila Garcês de
author_facet Araújo, Leila Garcês de
Prabhu, Anne Sitarama
Freire, Adelson de Barros
author_role author
author2 Prabhu, Anne Sitarama
Freire, Adelson de Barros
author2_role author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Araújo, Leila Garcês de
Prabhu, Anne Sitarama
Freire, Adelson de Barros
dc.subject.por.fl_str_mv Oryza sativa; Pyricularia grisea; somaclonal variation; tissue culture
Oryza sativa; Pyricularia grisea; variação somaclonal; cultura de tecido
topic Oryza sativa; Pyricularia grisea; somaclonal variation; tissue culture
Oryza sativa; Pyricularia grisea; variação somaclonal; cultura de tecido
description The degree of blast resistance of upland rice (Oryza sativa L.) cultivar Araguaia has decreased over time causing significant yield losses. The major objective of this study was to obtain blast (Pyricularia grisea) resistant somaclones, adapting greenhouse and field selection procedures. Rice blast resistance and agronomic traits were assessed in R2 to R6 generations derived from regenerant plants (R1) from immature panicles of Araguaia. The evaluation and selection procedures include testing of early segregating populations and fixed lines in the advanced generations, under natural field conditions, and artificial inoculations in the greenhouse, with prevalent races IB-1 and IB-9 of P. grisea. Somaclones with both vertical resistance and slow blasting resistance were obtained. Twenty of 31 somaclones developed with a high degree of vertical resistance and fan shaped plant type maintained resistance in field and blast nursery tests in the R6 generation. Greenhouse selection with two specific physiologic races yielded 44 somaclones with slow blasting resistance, similar plant type and yield potential as that of Araguaia.
publishDate 2000
dc.date.none.fl_str_mv 2000-02-01
dc.type.none.fl_str_mv
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/5772
url https://seer.sct.embrapa.br/index.php/pab/article/view/5772
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/5772/2876
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.35, n.2, fev. 2000; 357-367
Pesquisa Agropecuária Brasileira; v.35, n.2, fev. 2000; 357-367
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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