Kernel number response to plant density in tropical, temperate, and tropical × temperate maize hybrids
Kernel set response to plant density was examined in terms of physiological processes underlying kernel set in temperate (Te), tropical (Tr), and temperate × tropical (TeTr) maize (Zea mays L.) hybrids. Four field experiments were performed in a subtropical environment, and treatments combined two n...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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Crop Science Society of America
2020
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| Online Access: | http://hdl.handle.net/20.500.12123/7359 https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/csc2.20077 https://doi.org/10.1002/csc2.20077 |
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| author | Cerrudo, Diego Hernández, Mariano Tollenaar, Matthijs Vega, Claudia Rosa Cecilia Echarte, Laura |
| author_browse | Cerrudo, Diego Echarte, Laura Hernández, Mariano Tollenaar, Matthijs Vega, Claudia Rosa Cecilia |
| author_facet | Cerrudo, Diego Hernández, Mariano Tollenaar, Matthijs Vega, Claudia Rosa Cecilia Echarte, Laura |
| author_sort | Cerrudo, Diego |
| collection | INTA Digital |
| description | Kernel set response to plant density was examined in terms of physiological processes underlying kernel set in temperate (Te), tropical (Tr), and temperate × tropical (TeTr) maize (Zea mays L.) hybrids. Four field experiments were performed in a subtropical environment, and treatments combined two new and popular commercial hybrids of each group of germplasm background with five plant densities (2–30 plants m−2). Determinations included plant growth rate (PGRS) and topmost ear growth rate (EGRS) during the period bracketing silking, grain yield, and its components. In all hybrids, kernel number was the main grain yield component contributing to grain yield variations across densities. When grown in a high‐yielding subtropical environment, all hybrids exhibited increased kernel number per area with increasing plant density from 5 to 11 plants m−2. There was not a clear trend among groups of germplasm background in the number of kernel set at each plant density, but distinctive physiological processes underlying kernel number per plant (KNP) were evident between Te and Tr hybrids. Across plant densities, the KNP/PGRS ratio was larger and PGRS was lower in Te than in Tr hybrids. Larger KNP/PGRS in Te than in Tr hybrids were associated with greater prolificacy al low plant density and larger EGRS. In TeTr hybrids instead, there was not a common physiological process underlying kernel set, since genotypes representing this group shared traits similar to those of Te and Tr genotypes. |
| format | info:ar-repo/semantics/artículo |
| id | INTA7359 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Crop Science Society of America |
| publisherStr | Crop Science Society of America |
| record_format | dspace |
| spelling | INTA73592020-06-04T11:33:18Z Kernel number response to plant density in tropical, temperate, and tropical × temperate maize hybrids Cerrudo, Diego Hernández, Mariano Tollenaar, Matthijs Vega, Claudia Rosa Cecilia Echarte, Laura Maíz Híbridos Rendimiento Granos Germoplasma Maize Hybrids Yields Grain Germplasm Kernel set response to plant density was examined in terms of physiological processes underlying kernel set in temperate (Te), tropical (Tr), and temperate × tropical (TeTr) maize (Zea mays L.) hybrids. Four field experiments were performed in a subtropical environment, and treatments combined two new and popular commercial hybrids of each group of germplasm background with five plant densities (2–30 plants m−2). Determinations included plant growth rate (PGRS) and topmost ear growth rate (EGRS) during the period bracketing silking, grain yield, and its components. In all hybrids, kernel number was the main grain yield component contributing to grain yield variations across densities. When grown in a high‐yielding subtropical environment, all hybrids exhibited increased kernel number per area with increasing plant density from 5 to 11 plants m−2. There was not a clear trend among groups of germplasm background in the number of kernel set at each plant density, but distinctive physiological processes underlying kernel number per plant (KNP) were evident between Te and Tr hybrids. Across plant densities, the KNP/PGRS ratio was larger and PGRS was lower in Te than in Tr hybrids. Larger KNP/PGRS in Te than in Tr hybrids were associated with greater prolificacy al low plant density and larger EGRS. In TeTr hybrids instead, there was not a common physiological process underlying kernel set, since genotypes representing this group shared traits similar to those of Te and Tr genotypes. EEA Balcarce Fil: Cerrudo, Diego. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Fil: Hernández, Mariano. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Fil: Tollenaar, Matthijs. The Climate Corp; Estados Unidos Fil: Vega Claudia Rosa. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina. Fil: Echarte, Laura. Instituto Nacional de Tecnología Agropecuaria (INTA) Estación Experimental Agropecuaria Balcarce; Argentina Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina. 2020-06-04T11:14:05Z 2020-06-04T11:14:05Z 2020-02-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/7359 https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/csc2.20077 1435-0653 https://doi.org/10.1002/csc2.20077 eng info:eu-repo/semantics/restrictedAccess application/pdf Crop Science Society of America Crop Science 60 (1) : 381-390 (2020) |
| spellingShingle | Maíz Híbridos Rendimiento Granos Germoplasma Maize Hybrids Yields Grain Germplasm Cerrudo, Diego Hernández, Mariano Tollenaar, Matthijs Vega, Claudia Rosa Cecilia Echarte, Laura Kernel number response to plant density in tropical, temperate, and tropical × temperate maize hybrids |
| title | Kernel number response to plant density in tropical, temperate, and tropical × temperate maize hybrids |
| title_full | Kernel number response to plant density in tropical, temperate, and tropical × temperate maize hybrids |
| title_fullStr | Kernel number response to plant density in tropical, temperate, and tropical × temperate maize hybrids |
| title_full_unstemmed | Kernel number response to plant density in tropical, temperate, and tropical × temperate maize hybrids |
| title_short | Kernel number response to plant density in tropical, temperate, and tropical × temperate maize hybrids |
| title_sort | kernel number response to plant density in tropical temperate and tropical temperate maize hybrids |
| topic | Maíz Híbridos Rendimiento Granos Germoplasma Maize Hybrids Yields Grain Germplasm |
| url | http://hdl.handle.net/20.500.12123/7359 https://acsess.onlinelibrary.wiley.com/doi/abs/10.1002/csc2.20077 https://doi.org/10.1002/csc2.20077 |
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