Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia grisea

Detalhes bibliográficos
Autor(a) principal: de Araújo, Leila Garcês
Data de Publicação: 2002
Outros Autores: Prabhu, Anne Sitarama
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/6519
Resumo: Rice blast is one of the yield limiting factors of the rice cultivar Metica-1, in the State of Tocantins, Brazil. Plants of this cultivar were regenerated from the callus cultures derived from immature panicles with the objective of obtaining blast resistant somaclones. Two hundred eighty R2 plants were assessed utilizing pathotypes ID-14 and II-1 of Pyricularia grisea, retrieved from the cultivars Metica-1 and Cica-8, respectively. While all R2 plants of the cultivar Metica-1 were resistant to the pathotype II-1, the progenies of two R1 plants showed resistance to pathotype ID-14, indicating thereby the induction of genetic variation for blast resistance in the susceptible rice cultivar, in early generations. The R3 generation was advanced, and of 280 somaclones in R4 generation, 51 were selected including two somaclones CNAI10390 and CNAI10393, which exhibited vertical resistance, in blast nursery. In the advanced R5 and R6 generations, these two somaclones showed resistant reaction in blast nursery test, as well as in inoculation tests with the isolates from the cultivars Metica-1, Cica-8 and Epagri 108, and can be used as new blast resistant sources in rice breeding programs.
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spelling Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia griseaIndução de variabilidade na cultivar de arroz Metica-1 para resistência a Pyricularia griseaOryza sativa; rice blast; somaclonal variation; genetic variation; plant breedingOryza sativa; brusone; variação somaclonal; variação genética; melhoramento de plantas Rice blast is one of the yield limiting factors of the rice cultivar Metica-1, in the State of Tocantins, Brazil. Plants of this cultivar were regenerated from the callus cultures derived from immature panicles with the objective of obtaining blast resistant somaclones. Two hundred eighty R2 plants were assessed utilizing pathotypes ID-14 and II-1 of Pyricularia grisea, retrieved from the cultivars Metica-1 and Cica-8, respectively. While all R2 plants of the cultivar Metica-1 were resistant to the pathotype II-1, the progenies of two R1 plants showed resistance to pathotype ID-14, indicating thereby the induction of genetic variation for blast resistance in the susceptible rice cultivar, in early generations. The R3 generation was advanced, and of 280 somaclones in R4 generation, 51 were selected including two somaclones CNAI10390 and CNAI10393, which exhibited vertical resistance, in blast nursery. In the advanced R5 and R6 generations, these two somaclones showed resistant reaction in blast nursery test, as well as in inoculation tests with the isolates from the cultivars Metica-1, Cica-8 and Epagri 108, and can be used as new blast resistant sources in rice breeding programs.A brusone é um dos fatores limitantes da produtividade da cultivar Metica-1, no Estado do Tocantins. Objetivando obter somaclones resistentes, foi realizada a indução de calos e a regeneração de plantas a partir de panículas imaturas da cultivar Metica-1. Duzentas e oitenta plantas R2 foram submetidas a inoculação inóculo de patótipos de Pyricularia grisea, ID-14 e II-1, provenientes das cultivares Metica-1 e Cica-8, respectivamente. Enquanto todas as 280 plantas R2 de Metica-1 foram resistentes em relação ao patótipo II-1, as progênies de duas plantas R1 mostraram resistência ao patótipo ID-14, indicando a indução de variação genética com relação à resistência à brusone na cultivar suscetível, nas gerações iniciais. A geração R3 foi avançada e entre 280 somaclones R4 foram selecionados 51, incluindo dois somaclones, CNAI10390 e CNAI10393, que mostraram resistência vertical no viveiro de brusone. Nas gerações avançadas de R5 e R6, estes dois somaclones apresentaram resistência no viveiro e nas inoculações com cinco isolados, provenientes das cultivares Metica-1, Cica-8 e Epagri 108, e poderão ser usados como novas fontes de resistência à brusone nos programas de melhoramento de arroz.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária Brasileirade Araújo, Leila GarcêsPrabhu, Anne Sitarama2002-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/6519Pesquisa Agropecuaria Brasileira; v.37, n.12, dez. 2002; 1689-1695Pesquisa Agropecuária Brasileira; v.37, n.12, dez. 2002; 1689-16951678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/6519/3576info:eu-repo/semantics/openAccess2014-07-21T17:21:18Zoai:ojs.seer.sct.embrapa.br:article/6519Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-07-21T17:21:18Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia grisea
Indução de variabilidade na cultivar de arroz Metica-1 para resistência a Pyricularia grisea
title Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia grisea
spellingShingle Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia grisea
de Araújo, Leila Garcês
Oryza sativa; rice blast; somaclonal variation; genetic variation; plant breeding
Oryza sativa; brusone; variação somaclonal; variação genética; melhoramento de plantas
title_short Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia grisea
title_full Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia grisea
title_fullStr Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia grisea
title_full_unstemmed Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia grisea
title_sort Induction of variability for resistance in the rice cultivar Metica-1 to Pyricularia grisea
author de Araújo, Leila Garcês
author_facet de Araújo, Leila Garcês
Prabhu, Anne Sitarama
author_role author
author2 Prabhu, Anne Sitarama
author2_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv de Araújo, Leila Garcês
Prabhu, Anne Sitarama
dc.subject.por.fl_str_mv Oryza sativa; rice blast; somaclonal variation; genetic variation; plant breeding
Oryza sativa; brusone; variação somaclonal; variação genética; melhoramento de plantas
topic Oryza sativa; rice blast; somaclonal variation; genetic variation; plant breeding
Oryza sativa; brusone; variação somaclonal; variação genética; melhoramento de plantas
description Rice blast is one of the yield limiting factors of the rice cultivar Metica-1, in the State of Tocantins, Brazil. Plants of this cultivar were regenerated from the callus cultures derived from immature panicles with the objective of obtaining blast resistant somaclones. Two hundred eighty R2 plants were assessed utilizing pathotypes ID-14 and II-1 of Pyricularia grisea, retrieved from the cultivars Metica-1 and Cica-8, respectively. While all R2 plants of the cultivar Metica-1 were resistant to the pathotype II-1, the progenies of two R1 plants showed resistance to pathotype ID-14, indicating thereby the induction of genetic variation for blast resistance in the susceptible rice cultivar, in early generations. The R3 generation was advanced, and of 280 somaclones in R4 generation, 51 were selected including two somaclones CNAI10390 and CNAI10393, which exhibited vertical resistance, in blast nursery. In the advanced R5 and R6 generations, these two somaclones showed resistant reaction in blast nursery test, as well as in inoculation tests with the isolates from the cultivars Metica-1, Cica-8 and Epagri 108, and can be used as new blast resistant sources in rice breeding programs.
publishDate 2002
dc.date.none.fl_str_mv 2002-12-01
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/6519
url https://seer.sct.embrapa.br/index.php/pab/article/view/6519
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/6519/3576
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.37, n.12, dez. 2002; 1689-1695
Pesquisa Agropecuária Brasileira; v.37, n.12, dez. 2002; 1689-1695
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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