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Resumen
Postflowering heat stress causes the arrest of kernel growth, increasing kernel protein concentration and the relative abundance of γ-zeins, two biochemical traits contributing to maize (Zea mays L.) hardness. The impact of early and late postflowering heat stress on kernel physical traits related to hardness was studied on field-grown maize hybrids differing in their prevailing endosperm texture (two hybrids with a vitreous texture, and two others with a
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dc.contributor.author | Mayer, Luis Ignacio | |
dc.contributor.author | Cirilo, Alfredo Gabriel | |
dc.contributor.author | Maddonni, Gustavo Angel | |
dc.date.accessioned | 2019-12-26T13:51:28Z | |
dc.date.available | 2019-12-26T13:51:28Z | |
dc.date.issued | 2019-02 | |
dc.identifier.issn | 0011-183X | |
dc.identifier.issn | 1435-0653 (online) | |
dc.identifier.other | https://doi.org/10.2135/cropsci2018.04.0245 | |
dc.identifier.uri | https://dl.sciencesocieties.org/publications/cs/abstracts/59/1/318 | |
dc.identifier.uri | http://hdl.handle.net/20.500.12123/6574 | |
dc.description.abstract | Postflowering heat stress causes the arrest of kernel growth, increasing kernel protein concentration and the relative abundance of γ-zeins, two biochemical traits contributing to maize (Zea mays L.) hardness. The impact of early and late postflowering heat stress on kernel physical traits related to hardness was studied on field-grown maize hybrids differing in their prevailing endosperm texture (two hybrids with a vitreous texture, and two others with a floury texture). Kernel texture was softened by heat stress (P < 0.001), as indicated by decreases in traits that are usually positively related to hardness (thousand-kernel weight [up to 185 g], proportion of large kernels [up to 50–65 percentage points], kernel or bulk density [up to 7 kg hL−1] and milling ratio [up to 1 g g−1]) and increases in those usually negatively related (proportion of the smaller kernels and floater percentage [up to 30 and 75 percentage points, respectively]). Most of these effects were larger (P < 0.01), as heat stress occurred earlier in the grain-filling period. Kernel physical traits of the genotypes with a predominantly floury texture varied the most (P < 0.05) in response to heat stress. Genotypic and environmental variation effects in most hardness-related traits could be accounted for by kernel density (r2 = 0.74–0.87) or bulk density (r2 = 0.79–0.93). Sowing date and genotype selections should be considered as crop management practices for reducing or preventing the potential impact of heat stress on maize hardness. | eng |
dc.format | application/pdf | es_AR |
dc.language.iso | eng | es_AR |
dc.publisher | Crop Science Society of America | es_AR |
dc.rights | info:eu-repo/semantics/restrictedAccess | es_AR |
dc.source | Crop Science 59 (1) : 318-332. (Jenuary-February 2019) | es_AR |
dc.subject | Maíz | es_AR |
dc.subject | Maize | eng |
dc.subject | Llenado | es_AR |
dc.subject | Filling | eng |
dc.subject | Granos | es_AR |
dc.subject | Grain | eng |
dc.subject | Cultivo | es_AR |
dc.subject | Cultivation | eng |
dc.subject | Temperatura Ambiental | es_AR |
dc.subject | Environmental Temperature | eng |
dc.subject | Estrés Térmico | |
dc.subject | Heat Stress | eng |
dc.title | Kernel hardness-related traits in response to heat stress during the grain-filling period of maize crops | es_AR |
dc.type | info:ar-repo/semantics/artículo | es_AR |
dc.type | info:eu-repo/semantics/article | es_AR |
dc.type | info:eu-repo/semantics/publishedVersion | es_AR |
dc.description.origen | EEA Pergamino | es_AR |
dc.description.fil | Fil: Mayer, Luis Ignacio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Luis; Argentina | es_AR |
dc.description.fil | Fil: Cirilo, Alfredo Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Ecofisiología; Argentina | es_AR |
dc.description.fil | Fil: Maddonni, Gustavo Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura. Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura; Argentina. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina | es_AR |
dc.subtype | cientifico |
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