Drought tolerance in upland rice: identification of genotypes and agronomic characteristics

Detalhes bibliográficos
Autor(a) principal: Guimarães, Cleber Morais
Data de Publicação: 2016
Outros Autores: Castro, Adriano Pereira de, Stone, Luís Fernando, Oliveira, Jaison Pereira de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Acta Scientiarum. Agronomy (Online)
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27164
Resumo: This study aimed to identify upland rice cultivars and elite lines that are tolerant to drought and the agronomic traits associated with this tolerance. Forty-one genotypes were evaluated in a randomized block design with three replications in experiments with and without water stress at the Experimental Station of Emater, in Porangatu, Goiás State, in 2011 and 2012. The first experiment was well-irrigated throughout plant development and the second experiment was irrigated only up to 40 days after emergence, after which water stress was imposed. A multivariate analysis using Ward’s method was applied, and the genotypes with and without water stress were classified into six and seven clusters, respectively, based on the average yield in the two years of experimentation. The most productive cluster under water stress comprised the genotypes AB062041, Douradão, Guarani, BRS Aimoré, and Tangará. The first four genotypes of this cluster were also ranked in the second most productive cluster under  well-irrigated conditions. In the selection for drought tolerance, the genotypes that exhibit precocity, less dense panicles, low sterility and greater 100-grain weight under water stress should be prioritized. 
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spelling Drought tolerance in upland rice: identification of genotypes and agronomic characteristicsOryza sativa L.spikelet sterilityearlinessgrain weightFisiologia de Plantas CultivadasThis study aimed to identify upland rice cultivars and elite lines that are tolerant to drought and the agronomic traits associated with this tolerance. Forty-one genotypes were evaluated in a randomized block design with three replications in experiments with and without water stress at the Experimental Station of Emater, in Porangatu, Goiás State, in 2011 and 2012. The first experiment was well-irrigated throughout plant development and the second experiment was irrigated only up to 40 days after emergence, after which water stress was imposed. A multivariate analysis using Ward’s method was applied, and the genotypes with and without water stress were classified into six and seven clusters, respectively, based on the average yield in the two years of experimentation. The most productive cluster under water stress comprised the genotypes AB062041, Douradão, Guarani, BRS Aimoré, and Tangará. The first four genotypes of this cluster were also ranked in the second most productive cluster under  well-irrigated conditions. In the selection for drought tolerance, the genotypes that exhibit precocity, less dense panicles, low sterility and greater 100-grain weight under water stress should be prioritized. Universidade Estadual de Maringá2016-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa de Campoapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/2716410.4025/actasciagron.v38i2.27164Acta Scientiarum. Agronomy; Vol 38 No 2 (2016); 201-206Acta Scientiarum. Agronomy; v. 38 n. 2 (2016); 201-2061807-86211679-9275reponame:Acta Scientiarum. Agronomy (Online)instname:Universidade Estadual de Maringá (UEM)instacron:UEMenghttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27164/pdf_128Guimarães, Cleber MoraisCastro, Adriano Pereira deStone, Luís FernandoOliveira, Jaison Pereira deinfo:eu-repo/semantics/openAccess2022-02-16T21:48:12Zoai:periodicos.uem.br/ojs:article/27164Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgronPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/oaiactaagron@uem.br||actaagron@uem.br|| edamasio@uem.br1807-86211679-9275opendoar:2022-02-16T21:48:12Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
title Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
spellingShingle Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
Guimarães, Cleber Morais
Oryza sativa L.
spikelet sterility
earliness
grain weight
Fisiologia de Plantas Cultivadas
title_short Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
title_full Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
title_fullStr Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
title_full_unstemmed Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
title_sort Drought tolerance in upland rice: identification of genotypes and agronomic characteristics
author Guimarães, Cleber Morais
author_facet Guimarães, Cleber Morais
Castro, Adriano Pereira de
Stone, Luís Fernando
Oliveira, Jaison Pereira de
author_role author
author2 Castro, Adriano Pereira de
Stone, Luís Fernando
Oliveira, Jaison Pereira de
author2_role author
author
author
dc.contributor.author.fl_str_mv Guimarães, Cleber Morais
Castro, Adriano Pereira de
Stone, Luís Fernando
Oliveira, Jaison Pereira de
dc.subject.por.fl_str_mv Oryza sativa L.
spikelet sterility
earliness
grain weight
Fisiologia de Plantas Cultivadas
topic Oryza sativa L.
spikelet sterility
earliness
grain weight
Fisiologia de Plantas Cultivadas
description This study aimed to identify upland rice cultivars and elite lines that are tolerant to drought and the agronomic traits associated with this tolerance. Forty-one genotypes were evaluated in a randomized block design with three replications in experiments with and without water stress at the Experimental Station of Emater, in Porangatu, Goiás State, in 2011 and 2012. The first experiment was well-irrigated throughout plant development and the second experiment was irrigated only up to 40 days after emergence, after which water stress was imposed. A multivariate analysis using Ward’s method was applied, and the genotypes with and without water stress were classified into six and seven clusters, respectively, based on the average yield in the two years of experimentation. The most productive cluster under water stress comprised the genotypes AB062041, Douradão, Guarani, BRS Aimoré, and Tangará. The first four genotypes of this cluster were also ranked in the second most productive cluster under  well-irrigated conditions. In the selection for drought tolerance, the genotypes that exhibit precocity, less dense panicles, low sterility and greater 100-grain weight under water stress should be prioritized. 
publishDate 2016
dc.date.none.fl_str_mv 2016-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Pesquisa de Campo
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27164
10.4025/actasciagron.v38i2.27164
url http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27164
identifier_str_mv 10.4025/actasciagron.v38i2.27164
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/27164/pdf_128
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 Universidade Estadual de Maringá
publisher.none.fl_str_mv Universidade Estadual de Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Agronomy; Vol 38 No 2 (2016); 201-206
Acta Scientiarum. Agronomy; v. 38 n. 2 (2016); 201-206
1807-8621
1679-9275
reponame:Acta Scientiarum. Agronomy (Online)
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta Scientiarum. Agronomy (Online)
collection Acta Scientiarum. Agronomy (Online)
repository.name.fl_str_mv Acta Scientiarum. Agronomy (Online) - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv actaagron@uem.br||actaagron@uem.br|| edamasio@uem.br
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