Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops
Identifying the physiological traits indirectly selected during the search for high-yielding maize hybrids is useful for guiding further improvements. To investigate such traits, in this study we focused on the critical period of kernel formation because kernel number is the main yield component aff...
| Autores principales: | , , , , , , , , , |
|---|---|
| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Oxford University Press
2022
|
| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/12730 https://academic.oup.com/jxb/article/72/10/3902/6179302 https://doi.org/10.1093/jxb/erab119 |
| _version_ | 1855036813034389504 |
|---|---|
| author | Cagnola, Juan I. Parco, Martín Rotili, Diego Hernán Ploschuk, Edmundo L. Curin, Facundo Amas, Juan Ignacio Luque, Sergio F. Maddonni, Gustavo Angel Otegui, María Elena Casal, Jorge José |
| author_browse | Amas, Juan Ignacio Cagnola, Juan I. Casal, Jorge José Curin, Facundo Luque, Sergio F. Maddonni, Gustavo Angel Otegui, María Elena Parco, Martín Ploschuk, Edmundo L. Rotili, Diego Hernán |
| author_facet | Cagnola, Juan I. Parco, Martín Rotili, Diego Hernán Ploschuk, Edmundo L. Curin, Facundo Amas, Juan Ignacio Luque, Sergio F. Maddonni, Gustavo Angel Otegui, María Elena Casal, Jorge José |
| author_sort | Cagnola, Juan I. |
| collection | INTA Digital |
| description | Identifying the physiological traits indirectly selected during the search for high-yielding maize hybrids is useful for guiding further improvements. To investigate such traits, in this study we focused on the critical period of kernel formation because kernel number is the main yield component affected by breeding. Our results show that breeding has increased the number of florets per ear and ear growth rate but not the vegetative shoot growth rate, suggesting localised effects around the ear. Consistent with this possibility, breeding has increased the net CO2 exchange of the ear leaf in field-grown crops grown at high population densities. This response is largely accounted for by increased light interception (which increases photosynthesis) and by reduced rates of respiration of the ear leaf in modern hybrids compared to older ones. Modern hybrids show increased ear-leaf area per unit leaf dry matter (specific leaf area), which accounts for the reduced respiratory load per unit leaf area. These observations are consistent with a model where the improved ear leaf CO2 exchange helps the additional florets produced by modern hybrids to survive the critical period of high susceptibility to stress and hence to produce kernels. |
| format | info:ar-repo/semantics/artículo |
| id | INTA12730 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Oxford University Press |
| publisherStr | Oxford University Press |
| record_format | dspace |
| spelling | INTA127302022-08-30T16:52:18Z Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops Cagnola, Juan I. Parco, Martín Rotili, Diego Hernán Ploschuk, Edmundo L. Curin, Facundo Amas, Juan Ignacio Luque, Sergio F. Maddonni, Gustavo Angel Otegui, María Elena Casal, Jorge José Maíz Rendimiento Fitomejoramiento Carbono Fotosíntesis Granos Maize Yields Plant Breeding Carbon Photosynthesis Grain Canopy Density Specific Leaf Area Identifying the physiological traits indirectly selected during the search for high-yielding maize hybrids is useful for guiding further improvements. To investigate such traits, in this study we focused on the critical period of kernel formation because kernel number is the main yield component affected by breeding. Our results show that breeding has increased the number of florets per ear and ear growth rate but not the vegetative shoot growth rate, suggesting localised effects around the ear. Consistent with this possibility, breeding has increased the net CO2 exchange of the ear leaf in field-grown crops grown at high population densities. This response is largely accounted for by increased light interception (which increases photosynthesis) and by reduced rates of respiration of the ear leaf in modern hybrids compared to older ones. Modern hybrids show increased ear-leaf area per unit leaf dry matter (specific leaf area), which accounts for the reduced respiratory load per unit leaf area. These observations are consistent with a model where the improved ear leaf CO2 exchange helps the additional florets produced by modern hybrids to survive the critical period of high susceptibility to stress and hence to produce kernels. EEA Pergamino Fil: Cagnola, Juan I. Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Facultad de Agronomía; Argentina Fil: Cagnola, Juan I. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Fisiología Vegetal; Argentina Fil: Parco, Martín. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina Fil: Rotili, Diego H. Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Facultad de Agronomía; Argentina Fil: Rotili, Diego H. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina Fil: Ploschuk, Edmundo L. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cultivos Industriales; Argentina Fil: Curín, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires (CIT-NOBA-CONICET); Argentina Fil: Amas, Juan I. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencia del noroeste de la Provincia de Buenos Aires (CIT-NOBA-CONICET); Argentina Fil: Luque, Sergio F. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias; Argentina Fil: Maddoni, Gustavo A. Universidad de Buenos Aires. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Facultad de Agronomía; Argentina Fil: Maddoni, Gustavo A. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Cerealicultura; Argentina Fil: Otegui, María Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Ecofisiología; Argentina Fil: Otegui, María E. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Otegui, María E. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Producción Vegetal; Argentina Fil: Casal, Jorge J. Universidad de Buenos Aires, Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Facultad de Agronomía; Argentina Fil: Casal, Jorge J. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Fisiología Vegetal; Argentina Fil: Casal, Jorge J. Fundación Instituto Leloir. Instituto de Investigaciones Bioquímicas de Buenos Aires. CONICET; Argentina 2022-08-30T16:42:26Z 2022-08-30T16:42:26Z 2021-03 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/12730 https://academic.oup.com/jxb/article/72/10/3902/6179302 0022-0957 1460-2431 (online) https://doi.org/10.1093/jxb/erab119 eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Oxford University Press Journal of Experimental Botany 72 (10) : 3902–3913. (May 2021) |
| spellingShingle | Maíz Rendimiento Fitomejoramiento Carbono Fotosíntesis Granos Maize Yields Plant Breeding Carbon Photosynthesis Grain Canopy Density Specific Leaf Area Cagnola, Juan I. Parco, Martín Rotili, Diego Hernán Ploschuk, Edmundo L. Curin, Facundo Amas, Juan Ignacio Luque, Sergio F. Maddonni, Gustavo Angel Otegui, María Elena Casal, Jorge José Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops |
| title | Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops |
| title_full | Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops |
| title_fullStr | Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops |
| title_full_unstemmed | Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops |
| title_short | Artificial selection for grain yield has increased net CO2 exchange of the ear leaf in maize crops |
| title_sort | artificial selection for grain yield has increased net co2 exchange of the ear leaf in maize crops |
| topic | Maíz Rendimiento Fitomejoramiento Carbono Fotosíntesis Granos Maize Yields Plant Breeding Carbon Photosynthesis Grain Canopy Density Specific Leaf Area |
| url | http://hdl.handle.net/20.500.12123/12730 https://academic.oup.com/jxb/article/72/10/3902/6179302 https://doi.org/10.1093/jxb/erab119 |
| work_keys_str_mv | AT cagnolajuani artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops AT parcomartin artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops AT rotilidiegohernan artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops AT ploschukedmundol artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops AT curinfacundo artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops AT amasjuanignacio artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops AT luquesergiof artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops AT maddonnigustavoangel artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops AT oteguimariaelena artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops AT casaljorgejose artificialselectionforgrainyieldhasincreasednetco2exchangeoftheearleafinmaizecrops |