Tolerância à deficiência hídrica de genótipos de arroz de terras altas

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dc.contributor.authorGuimarães, Cleber M.
dc.contributor.authorStone, Luís F.
dc.contributor.authorRangel, Paulo H.N.
dc.contributor.authorSilva, Ana C. de L. [UNESP]
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:30:07Z
dc.date.available2014-05-27T11:30:07Z
dc.date.issued2013-08-01
dc.description.abstractWater 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.en
dc.description.affiliationEmbrapa Arroz e Feijão, C.P. 179, CEP 75375-000, Santo Antônio de Goiás, GO
dc.description.affiliationFCA/UNESP, C.P. 237, CEP 18610-307, Botucatu, SP
dc.description.affiliationUnespFCA/UNESP, C.P. 237, CEP 18610-307, Botucatu, SP
dc.description.sponsorshipOrygens program
dc.description.sponsorshipGeneration Challenge program
dc.description.sponsorshipDrought Phenotyping Networking program
dc.format.extent805-810
dc.identifierhttp://dx.doi.org/10.1590/S1415-43662013000800001
dc.identifier.citationRevista Brasileira de Engenharia Agricola e Ambiental, v. 17, n. 8, p. 805-810, 2013.
dc.identifier.doi10.1590/S1415-43662013000800001
dc.identifier.file2-s2.0-84883681444.pdf
dc.identifier.issn1415-4366
dc.identifier.issn1807-1929
dc.identifier.scieloS1415-43662013000800001
dc.identifier.scopus2-s2.0-84883681444
dc.identifier.urihttp://hdl.handle.net/11449/76183
dc.identifier.wosWOS:000328270600001
dc.language.isoeng
dc.language.isopor
dc.relation.ispartofRevista Brasileira de Engenharia Agrícola e Ambiental
dc.relation.ispartofjcr0.619
dc.relation.ispartofsjr0,541
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectGrain yielden
dc.subjectIrrigationen
dc.subjectLeaf temperatureen
dc.subjectOryza sativaen
dc.titleTolerância à deficiência hídrica de genótipos de arroz de terras altaspt
dc.title.alternativeTolerance of upland rice genotypes to water deficiten
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/rbeaa/paboutj.htm#a04

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