Responses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maize
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 w...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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2017
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/905 http://onlinelibrary.wiley.com/doi/10.1111/jac.12136/abstract |
| _version_ | 1855482796312625152 |
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| author | Antonietta, Mariana Acciaresi, Horacio Abel Guiamet, Juan José |
| author_browse | Acciaresi, Horacio Abel Antonietta, Mariana Guiamet, Juan José |
| author_facet | Antonietta, Mariana Acciaresi, Horacio Abel Guiamet, Juan José |
| author_sort | Antonietta, Mariana |
| collection | INTA Digital |
| description | 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 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. |
| format | Artículo |
| id | INTA905 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| record_format | dspace |
| spelling | INTA9052019-08-26T12:26:29Z Responses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maize Antonietta, Mariana Acciaresi, Horacio Abel Guiamet, Juan José Maíz Nitrógeno Híbridos Maize Nitrogen Hybrids Nutrient Deficiencies Deficiencia de Nutrientes 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 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. Fil: 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 Fil: 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 Fil: 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 2017-08-07T12:02:25Z 2017-08-07T12:02:25Z 2016-06 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/905 http://onlinelibrary.wiley.com/doi/10.1111/jac.12136/abstract 0931-2250 DOI: 10.1111/jac.12136 eng info:eu-repo/semantics/restrictedAccess application/pdf Argentina (nation) Journal of agronomy and crop science 202 (3) : 231-242. (2016) |
| spellingShingle | Maíz Nitrógeno Híbridos Maize Nitrogen Hybrids Nutrient Deficiencies Deficiencia de Nutrientes Antonietta, Mariana Acciaresi, Horacio Abel Guiamet, Juan José Responses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maize |
| title | Responses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maize |
| title_full | Responses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maize |
| title_fullStr | Responses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maize |
| title_full_unstemmed | Responses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maize |
| title_short | Responses to N Deficiency in Stay Green and Non-Stay Green Argentinean Hybrids of Maize |
| title_sort | responses to n deficiency in stay green and non stay green argentinean hybrids of maize |
| topic | Maíz Nitrógeno Híbridos Maize Nitrogen Hybrids Nutrient Deficiencies Deficiencia de Nutrientes |
| url | http://hdl.handle.net/20.500.12123/905 http://onlinelibrary.wiley.com/doi/10.1111/jac.12136/abstract |
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