Tolerância à deficiência hídrica de genótipos de arroz de terras altas
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1415-43662013000800001 http://hdl.handle.net/11449/76183 |
Resumo: | Water deficit is one of the environmental factors that cause a great reduction in the upland rice grain yield. The objective of this study was to evaluate genotypes of upland rice with broad genetic diversity for tolerance to this stress and to identify secondary traits for evaluation of this tolerance. Sixty-four genotypes were evaluated during two years at the Experiment Station of EMATER, in Porangatu, GO, under well-watered and water deficit conditions. The genotypes showed differences in grain yield and were influenced differently by the water treatments, both under a mild water deficit in the first year and under a severe one in the second year. The genotype grain yield under water deficiency was significantly and positively correlated with tiller fertility, number of panicles m-2, 100-grain weight, and plant height, and negatively with spikelet sterility and the number of days for the occurrence of 50% panicle emergence. It was also observed that the most productive genotypes under water deficit conditions showed lower leaf temperature, indicating improved water status. Nine genotypes were productive in both water conditions and three were productive only when well-watered. |
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Tolerância à deficiência hídrica de genótipos de arroz de terras altasTolerance of upland rice genotypes to water deficitGrain yieldIrrigationLeaf temperatureOryza sativaWater deficit is one of the environmental factors that cause a great reduction in the upland rice grain yield. The objective of this study was to evaluate genotypes of upland rice with broad genetic diversity for tolerance to this stress and to identify secondary traits for evaluation of this tolerance. Sixty-four genotypes were evaluated during two years at the Experiment Station of EMATER, in Porangatu, GO, under well-watered and water deficit conditions. The genotypes showed differences in grain yield and were influenced differently by the water treatments, both under a mild water deficit in the first year and under a severe one in the second year. The genotype grain yield under water deficiency was significantly and positively correlated with tiller fertility, number of panicles m-2, 100-grain weight, and plant height, and negatively with spikelet sterility and the number of days for the occurrence of 50% panicle emergence. It was also observed that the most productive genotypes under water deficit conditions showed lower leaf temperature, indicating improved water status. Nine genotypes were productive in both water conditions and three were productive only when well-watered.Orygens programGeneration Challenge programDrought Phenotyping Networking programEmbrapa Arroz e Feijão, C.P. 179, CEP 75375-000, Santo Antônio de Goiás, GOFCA/UNESP, C.P. 237, CEP 18610-307, Botucatu, SPFCA/UNESP, C.P. 237, CEP 18610-307, Botucatu, SPEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)Universidade Estadual Paulista (Unesp)Guimarães, Cleber M.Stone, Luís F.Rangel, Paulo H.N.Silva, Ana C. de L. [UNESP]2014-05-27T11:30:07Z2014-05-27T11:30:07Z2013-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article805-810application/pdfhttp://dx.doi.org/10.1590/S1415-43662013000800001Revista Brasileira de Engenharia Agricola e Ambiental, v. 17, n. 8, p. 805-810, 2013.1415-43661807-1929http://hdl.handle.net/11449/7618310.1590/S1415-43662013000800001S1415-43662013000800001WOS:0003282706000012-s2.0-848836814442-s2.0-84883681444.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengporRevista Brasileira de Engenharia Agrícola e Ambiental0.6190,541info:eu-repo/semantics/openAccess2024-04-09T15:10:26Zoai:repositorio.unesp.br:11449/76183Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-05-23T11:38:40.032572Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Tolerância à deficiência hídrica de genótipos de arroz de terras altas Tolerance of upland rice genotypes to water deficit |
title |
Tolerância à deficiência hídrica de genótipos de arroz de terras altas |
spellingShingle |
Tolerância à deficiência hídrica de genótipos de arroz de terras altas Guimarães, Cleber M. Grain yield Irrigation Leaf temperature Oryza sativa |
title_short |
Tolerância à deficiência hídrica de genótipos de arroz de terras altas |
title_full |
Tolerância à deficiência hídrica de genótipos de arroz de terras altas |
title_fullStr |
Tolerância à deficiência hídrica de genótipos de arroz de terras altas |
title_full_unstemmed |
Tolerância à deficiência hídrica de genótipos de arroz de terras altas |
title_sort |
Tolerância à deficiência hídrica de genótipos de arroz de terras altas |
author |
Guimarães, Cleber M. |
author_facet |
Guimarães, Cleber M. Stone, Luís F. Rangel, Paulo H.N. Silva, Ana C. de L. [UNESP] |
author_role |
author |
author2 |
Stone, Luís F. Rangel, Paulo H.N. Silva, Ana C. de L. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Guimarães, Cleber M. Stone, Luís F. Rangel, Paulo H.N. Silva, Ana C. de L. [UNESP] |
dc.subject.por.fl_str_mv |
Grain yield Irrigation Leaf temperature Oryza sativa |
topic |
Grain yield Irrigation Leaf temperature Oryza sativa |
description |
Water deficit is one of the environmental factors that cause a great reduction in the upland rice grain yield. The objective of this study was to evaluate genotypes of upland rice with broad genetic diversity for tolerance to this stress and to identify secondary traits for evaluation of this tolerance. Sixty-four genotypes were evaluated during two years at the Experiment Station of EMATER, in Porangatu, GO, under well-watered and water deficit conditions. The genotypes showed differences in grain yield and were influenced differently by the water treatments, both under a mild water deficit in the first year and under a severe one in the second year. The genotype grain yield under water deficiency was significantly and positively correlated with tiller fertility, number of panicles m-2, 100-grain weight, and plant height, and negatively with spikelet sterility and the number of days for the occurrence of 50% panicle emergence. It was also observed that the most productive genotypes under water deficit conditions showed lower leaf temperature, indicating improved water status. Nine genotypes were productive in both water conditions and three were productive only when well-watered. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-08-01 2014-05-27T11:30:07Z 2014-05-27T11:30:07Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S1415-43662013000800001 Revista Brasileira de Engenharia Agricola e Ambiental, v. 17, n. 8, p. 805-810, 2013. 1415-4366 1807-1929 http://hdl.handle.net/11449/76183 10.1590/S1415-43662013000800001 S1415-43662013000800001 WOS:000328270600001 2-s2.0-84883681444 2-s2.0-84883681444.pdf |
url |
http://dx.doi.org/10.1590/S1415-43662013000800001 http://hdl.handle.net/11449/76183 |
identifier_str_mv |
Revista Brasileira de Engenharia Agricola e Ambiental, v. 17, n. 8, p. 805-810, 2013. 1415-4366 1807-1929 10.1590/S1415-43662013000800001 S1415-43662013000800001 WOS:000328270600001 2-s2.0-84883681444 2-s2.0-84883681444.pdf |
dc.language.iso.fl_str_mv |
eng por |
language |
eng por |
dc.relation.none.fl_str_mv |
Revista Brasileira de Engenharia Agrícola e Ambiental 0.619 0,541 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
805-810 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1803045856766590976 |