Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids

Autores
Luque, Sergio F.; Cirilo, Alfredo Gabriel; Otegui, María Elena
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Genetic gains in grain yield and related phenotypic attributes have been extensively documented in maize (Zea mays L.), but the effect of breeding on the physiological determinants of grain yield is yet poorly understood. We determined genetic gains in grain yield and related physiological traits for seven maize hybrids developed for the central region of Argentina between 1965 and 1997. Gains were expressed as a function of the year of release (YOR). Hybrids were cropped in the field at five stand densities (from almost isolated plants to supra-optimal levels) during two contrasting growing seasons (E1 and E2). Water and nutrient stress were prevented and pests controlled. Genetic gains in grain yield (≥13.2 g m−2 YOR−1) were mainly associated with improved kernel number, enhanced postsilking biomass production, and enhanced biomass allocation to reproductive sinks, but computed gains were affected by the environment. Differences among hybrids arose at the start of the critical period, and were evident as improved mean radiation use efficiency (≥0.026 g MJ−1 YOR−1), enhanced plant growth rate at near optimum stand density (≥0.04 g pl−1 YOR−1), and improved biomass partitioning to the ear around silking (0.0034 YOR−1, only for E1). Improved biomass production after silking was related to an increased light interception (≥4.7 MJ m−2 YOR−1), and allowed for an almost constant source–sink ratio during grain filling. This trend determined no trade-off between kernel number and kernel weight. In contrast to previous studies, genetic gains were detected for potential productivity (e.g., maximum grain yield) on a per plant basis (i.e., under no resource competition), a promising aspect for the improvement of crop grain yield potential.
EEA Pergamino
Fil: Luque, Sergio F. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Cereales y Oleaginosas; Argentina
Fil: Cirilo, Alfredo Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Ecofisiología; Argentina
Fil: Otegui, María E. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
Fuente
Field Crops Research 95 (2–3) : 383-397. (February 2006)
Materia
Maíz
Fisiología Vegetal
Fitomejoramient
Granos
Maize
Plant Physiology
Plant Breeding
Grain
Grain Yield
Genetic Gain
Nivel de accesibilidad
acceso restringido
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/14136
Acceder
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oai_identifier_str oai:localhost:20.500.12123/14136
network_acronym_str INTADig
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network_name_str INTA Digital (INTA)
spelling Genetic gains in grain yield and related physiological attributes in Argentine maize hybridsLuque, Sergio F.Cirilo, Alfredo GabrielOtegui, María ElenaMaízFisiología VegetalFitomejoramientGranosMaizePlant PhysiologyPlant BreedingGrainGrain YieldGenetic GainGenetic gains in grain yield and related phenotypic attributes have been extensively documented in maize (Zea mays L.), but the effect of breeding on the physiological determinants of grain yield is yet poorly understood. We determined genetic gains in grain yield and related physiological traits for seven maize hybrids developed for the central region of Argentina between 1965 and 1997. Gains were expressed as a function of the year of release (YOR). Hybrids were cropped in the field at five stand densities (from almost isolated plants to supra-optimal levels) during two contrasting growing seasons (E1 and E2). Water and nutrient stress were prevented and pests controlled. Genetic gains in grain yield (≥13.2 g m−2 YOR−1) were mainly associated with improved kernel number, enhanced postsilking biomass production, and enhanced biomass allocation to reproductive sinks, but computed gains were affected by the environment. Differences among hybrids arose at the start of the critical period, and were evident as improved mean radiation use efficiency (≥0.026 g MJ−1 YOR−1), enhanced plant growth rate at near optimum stand density (≥0.04 g pl−1 YOR−1), and improved biomass partitioning to the ear around silking (0.0034 YOR−1, only for E1). Improved biomass production after silking was related to an increased light interception (≥4.7 MJ m−2 YOR−1), and allowed for an almost constant source–sink ratio during grain filling. This trend determined no trade-off between kernel number and kernel weight. In contrast to previous studies, genetic gains were detected for potential productivity (e.g., maximum grain yield) on a per plant basis (i.e., under no resource competition), a promising aspect for the improvement of crop grain yield potential.EEA PergaminoFil: Luque, Sergio F. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Cereales y Oleaginosas; ArgentinaFil: Cirilo, Alfredo Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Ecofisiología; ArgentinaFil: Otegui, María E. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; ArgentinaElsevier2023-03-03T13:39:50Z2023-03-03T13:39:50Z2006-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/14136https://www.sciencedirect.com/science/article/pii/S03784290050009120378-4290https://doi.org/10.1016/j.fcr.2005.04.007Field Crops Research 95 (2–3) : 383-397. (February 2006)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-29T13:45:54Zoai:localhost:20.500.12123/14136instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-09-29 13:45:55.063INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
title Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
spellingShingle Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
Luque, Sergio F.
Maíz
Fisiología Vegetal
Fitomejoramient
Granos
Maize
Plant Physiology
Plant Breeding
Grain
Grain Yield
Genetic Gain
title_short Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
title_full Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
title_fullStr Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
title_full_unstemmed Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
title_sort Genetic gains in grain yield and related physiological attributes in Argentine maize hybrids
dc.creator.none.fl_str_mv Luque, Sergio F.
Cirilo, Alfredo Gabriel
Otegui, María Elena
author Luque, Sergio F.
author_facet Luque, Sergio F.
Cirilo, Alfredo Gabriel
Otegui, María Elena
author_role author
author2 Cirilo, Alfredo Gabriel
Otegui, María Elena
author2_role author
author
dc.subject.none.fl_str_mv Maíz
Fisiología Vegetal
Fitomejoramient
Granos
Maize
Plant Physiology
Plant Breeding
Grain
Grain Yield
Genetic Gain
topic Maíz
Fisiología Vegetal
Fitomejoramient
Granos
Maize
Plant Physiology
Plant Breeding
Grain
Grain Yield
Genetic Gain
dc.description.none.fl_txt_mv Genetic gains in grain yield and related phenotypic attributes have been extensively documented in maize (Zea mays L.), but the effect of breeding on the physiological determinants of grain yield is yet poorly understood. We determined genetic gains in grain yield and related physiological traits for seven maize hybrids developed for the central region of Argentina between 1965 and 1997. Gains were expressed as a function of the year of release (YOR). Hybrids were cropped in the field at five stand densities (from almost isolated plants to supra-optimal levels) during two contrasting growing seasons (E1 and E2). Water and nutrient stress were prevented and pests controlled. Genetic gains in grain yield (≥13.2 g m−2 YOR−1) were mainly associated with improved kernel number, enhanced postsilking biomass production, and enhanced biomass allocation to reproductive sinks, but computed gains were affected by the environment. Differences among hybrids arose at the start of the critical period, and were evident as improved mean radiation use efficiency (≥0.026 g MJ−1 YOR−1), enhanced plant growth rate at near optimum stand density (≥0.04 g pl−1 YOR−1), and improved biomass partitioning to the ear around silking (0.0034 YOR−1, only for E1). Improved biomass production after silking was related to an increased light interception (≥4.7 MJ m−2 YOR−1), and allowed for an almost constant source–sink ratio during grain filling. This trend determined no trade-off between kernel number and kernel weight. In contrast to previous studies, genetic gains were detected for potential productivity (e.g., maximum grain yield) on a per plant basis (i.e., under no resource competition), a promising aspect for the improvement of crop grain yield potential.
EEA Pergamino
Fil: Luque, Sergio F. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Cereales y Oleaginosas; Argentina
Fil: Cirilo, Alfredo Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino. Ecofisiología; Argentina
Fil: Otegui, María E. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
description Genetic gains in grain yield and related phenotypic attributes have been extensively documented in maize (Zea mays L.), but the effect of breeding on the physiological determinants of grain yield is yet poorly understood. We determined genetic gains in grain yield and related physiological traits for seven maize hybrids developed for the central region of Argentina between 1965 and 1997. Gains were expressed as a function of the year of release (YOR). Hybrids were cropped in the field at five stand densities (from almost isolated plants to supra-optimal levels) during two contrasting growing seasons (E1 and E2). Water and nutrient stress were prevented and pests controlled. Genetic gains in grain yield (≥13.2 g m−2 YOR−1) were mainly associated with improved kernel number, enhanced postsilking biomass production, and enhanced biomass allocation to reproductive sinks, but computed gains were affected by the environment. Differences among hybrids arose at the start of the critical period, and were evident as improved mean radiation use efficiency (≥0.026 g MJ−1 YOR−1), enhanced plant growth rate at near optimum stand density (≥0.04 g pl−1 YOR−1), and improved biomass partitioning to the ear around silking (0.0034 YOR−1, only for E1). Improved biomass production after silking was related to an increased light interception (≥4.7 MJ m−2 YOR−1), and allowed for an almost constant source–sink ratio during grain filling. This trend determined no trade-off between kernel number and kernel weight. In contrast to previous studies, genetic gains were detected for potential productivity (e.g., maximum grain yield) on a per plant basis (i.e., under no resource competition), a promising aspect for the improvement of crop grain yield potential.
publishDate 2006
dc.date.none.fl_str_mv 2006-02
2023-03-03T13:39:50Z
2023-03-03T13:39:50Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/14136
https://www.sciencedirect.com/science/article/pii/S0378429005000912
0378-4290
https://doi.org/10.1016/j.fcr.2005.04.007
url http://hdl.handle.net/20.500.12123/14136
https://www.sciencedirect.com/science/article/pii/S0378429005000912
https://doi.org/10.1016/j.fcr.2005.04.007
identifier_str_mv 0378-4290
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv Field Crops Research 95 (2–3) : 383-397. (February 2006)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.559606

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