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Abstract
Breeding has developed better yielding maize hybrids for low N environments, which also have delayed leaf senescence (‘stay green’ trait, SG). Here, we studied whether the SG trait can further improve yield of modern hybrids under N-limiting conditions. In two field experiments, four maize hybrids with different senescence behaviour were grown under three N fertilization levels, from 0 to 200 kg N ha 1 (N0, N100 and N200). After silking, hybrids differed [ver mas...]
dc.contributor.authorAntonietta, Mariana
dc.contributor.authorAcciaresi, Horacio Abel
dc.contributor.authorGuiamet, Juan José
dc.coverage.spatialArgentina (nation)
dc.date.accessioned2017-08-07T12:02:25Z
dc.date.available2017-08-07T12:02:25Z
dc.date.issued2016-06
dc.identifier.issn0931-2250
dc.identifier.otherDOI: 10.1111/jac.12136
dc.identifier.urihttp://hdl.handle.net/20.500.12123/905
dc.identifier.urihttp://onlinelibrary.wiley.com/doi/10.1111/jac.12136/abstract
dc.description.abstractBreeding has developed better yielding maize hybrids for low N environments, which also have delayed leaf senescence (‘stay green’ trait, SG). Here, we studied whether the SG trait can further improve yield of modern hybrids under N-limiting conditions. In two field experiments, four maize hybrids with different senescence behaviour were grown under three N fertilization levels, from 0 to 200 kg N ha 1 (N0, N100 and N200). After silking, hybrids differed for senescence depending on the canopy layer (P < 0.05): the SG AX878 only delayed senescence at the mid and upper canopy layers while the SG NK880 delayed senescence of all layers. Across N doses, higher yields were achieved by both SG hybrids, AX878 and NK880 (P < 0.05) but yield was not only determined by senescence behaviour. Kernel weight (KW) response to N availability was larger for SGs than for their non-‘stay green’ counterparts. Delayed senescence in SG hybrids was not related to higher post-silking N uptake but to higher (P < 0.05) %N in leaves and lower (P < 0.05) %N in kernels at harvest (below the critical 1.1 % under N deficiency). Across N levels, KW positively related to N content per kernel, with a steeper slope (P < 0.05) for the SG hybrids. Taken together, our results suggest that a condition where N limits kernel growth, in a scenario of saturating C availability, may be common to stay green genotypes of maize.eng
dc.formatapplication/pdfeng
dc.language.isoeng
dc.rightsinfo:eu-repo/semantics/restrictedAccesseng
dc.sourceJournal of agronomy and crop science 202 (3) : 231-242. (2016)eng
dc.subjectMaízes_AR
dc.subjectMaizeeng
dc.subjectNitrógenoes_AR
dc.subjectNitrogeneng
dc.subjectHíbridoses_AR
dc.subjectHybridseng
dc.subjectDeficiencia de Nutrientes
dc.subjectNutrient Deficiencieseng
dc.titleResponses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maizeeng
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articleeng
dc.typeinfo:eu-repo/semantics/publishedVersioneng
dc.description.filFil: Antonietta, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Fisiología Vegetal. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Fisiología Vegetal; Argentina
dc.description.filFil: Acciaresi, Horacio Abel.. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino; Argentina
dc.description.filFil: Guiamet, Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico La Plata. Instituto de Fisiología Vegetal; Argentina; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Agrarias y Forestales; Argentina
dc.subtypecientifico


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