Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments

Autores
Rossini, María; Curin, Facundo; Otegui, María Elena
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context or problem: Kernel number per ear (KNE) is the main driver of improved grain yield per ear (GYE) in maize (Zea mays L.). Under non-limiting conditions, KNE responded to variations in ear developmental traits such as the number of completely developed florets (CDFE) and exposed silks per ear (ESE), which have been positively affected by breeding. This trend needs to be assessed under common abiotic constraints that usually affect rainfed maize production. Objective or research question: The aim of the current research was to study breeding effects on maize grain yield and its associated reproductive developmental traits as well as the sources of loss of kernel number under a wide range of growing conditions per plant. Methods: Field experiments were conducted at two sites of the Central Pampas of Argentina, where hybrids of different year of release (from 1980 to 2012) were evaluated under 10 managed environments generated by the combination of (i) three growing seasons (2015–16: S1; 2017–18: S2; 2018–19: S3), (ii) two nitrogen rates (N0: no nitrogen added; N200: 200 kg N ha-1), and (iii) two stand densities in S1 and S2 (9 and 12 plants m-2). Plant biomass at R1 was used as a classifier of pre-flowering growth conditions (LOW, MID-LOW, MID-HIGH, and HIGH environments). Results: Although modern hybrids always presented more GYE and KNE than old hybrids, the reproductive developmental processes behind this response were different depending on the environment. Under HIGH en vironments, the KNE improvement (4.53 kernels year-1) was the result of a greater CDFE (7.55 florets year-1) and more ESE (6.01 silks year-1). Under LOW environments, the genetic progress in KNE (2.41 kernels year-1) was associated with a reduced kernel abortion (− 0.48 % year-1). Non-significant trend with year of release was observed in spikelet growth rate in all groups of evaluated environments, however, there was a significant decrease in the residual effect of the relationship between spikelet growth rate during the critical period and kernel abortion under LOW environments. Conclusions: Traits responsible for improved grain yield differed across environments because the relative importance of the determinant processes of kernel set vary across them. Under low-yielding environments, decreased kernel abortion is more beneficial than increased potential ear size (i.e., florets per ear) to enhance kernel number and grain yield. Implications or significance: This finding highlights the relevance of focusing on processes conducive to kernel abortion under stress-prone environments to improve maize grain yield.
EEA Pergamino
Fil: Rossini, M. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional de San Antonio de Areco. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires (CITNOBA); Argentina
Fil: Rossini, María. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Escuela de Ciencias Agrarias, Naturales y Ambientales (ECANA); Argentina
Fil: Curín, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional de San Antonio de Areco. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires (CITNOBA); Argentina
Fil: Otegui, María Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino; Argentina
Fil: Otegui, María Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Otegui, María Elena. Universidad de Buenos. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
Fuente
Field Crops Research 304 : 109150. (1 December 2023)
Materia
Maíz
Mejoramiento Genético
Estres
Producción de Semillas
Maize
Genetic Improvement
Stress
Seed Production
Reproductive Development
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:20.500.12123/15789
Acceder
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oai_identifier_str oai:localhost:20.500.12123/15789
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environmentsRossini, MaríaCurin, FacundoOtegui, María ElenaMaízMejoramiento GenéticoEstresProducción de SemillasMaizeGenetic ImprovementStressSeed ProductionReproductive DevelopmentContext or problem: Kernel number per ear (KNE) is the main driver of improved grain yield per ear (GYE) in maize (Zea mays L.). Under non-limiting conditions, KNE responded to variations in ear developmental traits such as the number of completely developed florets (CDFE) and exposed silks per ear (ESE), which have been positively affected by breeding. This trend needs to be assessed under common abiotic constraints that usually affect rainfed maize production. Objective or research question: The aim of the current research was to study breeding effects on maize grain yield and its associated reproductive developmental traits as well as the sources of loss of kernel number under a wide range of growing conditions per plant. Methods: Field experiments were conducted at two sites of the Central Pampas of Argentina, where hybrids of different year of release (from 1980 to 2012) were evaluated under 10 managed environments generated by the combination of (i) three growing seasons (2015–16: S1; 2017–18: S2; 2018–19: S3), (ii) two nitrogen rates (N0: no nitrogen added; N200: 200 kg N ha-1), and (iii) two stand densities in S1 and S2 (9 and 12 plants m-2). Plant biomass at R1 was used as a classifier of pre-flowering growth conditions (LOW, MID-LOW, MID-HIGH, and HIGH environments). Results: Although modern hybrids always presented more GYE and KNE than old hybrids, the reproductive developmental processes behind this response were different depending on the environment. Under HIGH en vironments, the KNE improvement (4.53 kernels year-1) was the result of a greater CDFE (7.55 florets year-1) and more ESE (6.01 silks year-1). Under LOW environments, the genetic progress in KNE (2.41 kernels year-1) was associated with a reduced kernel abortion (− 0.48 % year-1). Non-significant trend with year of release was observed in spikelet growth rate in all groups of evaluated environments, however, there was a significant decrease in the residual effect of the relationship between spikelet growth rate during the critical period and kernel abortion under LOW environments. Conclusions: Traits responsible for improved grain yield differed across environments because the relative importance of the determinant processes of kernel set vary across them. Under low-yielding environments, decreased kernel abortion is more beneficial than increased potential ear size (i.e., florets per ear) to enhance kernel number and grain yield. Implications or significance: This finding highlights the relevance of focusing on processes conducive to kernel abortion under stress-prone environments to improve maize grain yield.EEA PergaminoFil: Rossini, M. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional de San Antonio de Areco. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires (CITNOBA); ArgentinaFil: Rossini, María. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Escuela de Ciencias Agrarias, Naturales y Ambientales (ECANA); ArgentinaFil: Curín, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional de San Antonio de Areco. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires (CITNOBA); ArgentinaFil: Otegui, María Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino; ArgentinaFil: Otegui, María Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Otegui, María Elena. Universidad de Buenos. Facultad de Agronomía. Departamento de Producción Vegetal; ArgentinaElsevier2023-11-01T15:54:46Z2023-11-01T15:54:46Z2023-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/15789https://www.sciencedirect.com/science/article/pii/S037842902300343X0378-4290https://doi.org/10.1016/j.fcr.2023.109150Field Crops Research 304 : 109150. (1 December 2023)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)2025-11-27T08:39:45Zoai:localhost:20.500.12123/15789instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-11-27 08:39:45.433INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
title Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
spellingShingle Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
Rossini, María
Maíz
Mejoramiento Genético
Estres
Producción de Semillas
Maize
Genetic Improvement
Stress
Seed Production
Reproductive Development
title_short Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
title_full Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
title_fullStr Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
title_full_unstemmed Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
title_sort Ear reproductive development components associated with kernel set in maize: breeding effects under contrasting environments
dc.creator.none.fl_str_mv Rossini, María
Curin, Facundo
Otegui, María Elena
author Rossini, María
author_facet Rossini, María
Curin, Facundo
Otegui, María Elena
author_role author
author2 Curin, Facundo
Otegui, María Elena
author2_role author
author
dc.subject.none.fl_str_mv Maíz
Mejoramiento Genético
Estres
Producción de Semillas
Maize
Genetic Improvement
Stress
Seed Production
Reproductive Development
topic Maíz
Mejoramiento Genético
Estres
Producción de Semillas
Maize
Genetic Improvement
Stress
Seed Production
Reproductive Development
dc.description.none.fl_txt_mv Context or problem: Kernel number per ear (KNE) is the main driver of improved grain yield per ear (GYE) in maize (Zea mays L.). Under non-limiting conditions, KNE responded to variations in ear developmental traits such as the number of completely developed florets (CDFE) and exposed silks per ear (ESE), which have been positively affected by breeding. This trend needs to be assessed under common abiotic constraints that usually affect rainfed maize production. Objective or research question: The aim of the current research was to study breeding effects on maize grain yield and its associated reproductive developmental traits as well as the sources of loss of kernel number under a wide range of growing conditions per plant. Methods: Field experiments were conducted at two sites of the Central Pampas of Argentina, where hybrids of different year of release (from 1980 to 2012) were evaluated under 10 managed environments generated by the combination of (i) three growing seasons (2015–16: S1; 2017–18: S2; 2018–19: S3), (ii) two nitrogen rates (N0: no nitrogen added; N200: 200 kg N ha-1), and (iii) two stand densities in S1 and S2 (9 and 12 plants m-2). Plant biomass at R1 was used as a classifier of pre-flowering growth conditions (LOW, MID-LOW, MID-HIGH, and HIGH environments). Results: Although modern hybrids always presented more GYE and KNE than old hybrids, the reproductive developmental processes behind this response were different depending on the environment. Under HIGH en vironments, the KNE improvement (4.53 kernels year-1) was the result of a greater CDFE (7.55 florets year-1) and more ESE (6.01 silks year-1). Under LOW environments, the genetic progress in KNE (2.41 kernels year-1) was associated with a reduced kernel abortion (− 0.48 % year-1). Non-significant trend with year of release was observed in spikelet growth rate in all groups of evaluated environments, however, there was a significant decrease in the residual effect of the relationship between spikelet growth rate during the critical period and kernel abortion under LOW environments. Conclusions: Traits responsible for improved grain yield differed across environments because the relative importance of the determinant processes of kernel set vary across them. Under low-yielding environments, decreased kernel abortion is more beneficial than increased potential ear size (i.e., florets per ear) to enhance kernel number and grain yield. Implications or significance: This finding highlights the relevance of focusing on processes conducive to kernel abortion under stress-prone environments to improve maize grain yield.
EEA Pergamino
Fil: Rossini, M. A. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional de San Antonio de Areco. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires (CITNOBA); Argentina
Fil: Rossini, María. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Escuela de Ciencias Agrarias, Naturales y Ambientales (ECANA); Argentina
Fil: Curín, Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Noroeste de la Provincia de Buenos Aires. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires; Argentina. Universidad Nacional de San Antonio de Areco. Centro de Investigaciones y Transferencias del Noroeste de la Provincia de Buenos Aires (CITNOBA); Argentina
Fil: Otegui, María Elena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Pergamino; Argentina
Fil: Otegui, María Elena. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Otegui, María Elena. Universidad de Buenos. Facultad de Agronomía. Departamento de Producción Vegetal; Argentina
description Context or problem: Kernel number per ear (KNE) is the main driver of improved grain yield per ear (GYE) in maize (Zea mays L.). Under non-limiting conditions, KNE responded to variations in ear developmental traits such as the number of completely developed florets (CDFE) and exposed silks per ear (ESE), which have been positively affected by breeding. This trend needs to be assessed under common abiotic constraints that usually affect rainfed maize production. Objective or research question: The aim of the current research was to study breeding effects on maize grain yield and its associated reproductive developmental traits as well as the sources of loss of kernel number under a wide range of growing conditions per plant. Methods: Field experiments were conducted at two sites of the Central Pampas of Argentina, where hybrids of different year of release (from 1980 to 2012) were evaluated under 10 managed environments generated by the combination of (i) three growing seasons (2015–16: S1; 2017–18: S2; 2018–19: S3), (ii) two nitrogen rates (N0: no nitrogen added; N200: 200 kg N ha-1), and (iii) two stand densities in S1 and S2 (9 and 12 plants m-2). Plant biomass at R1 was used as a classifier of pre-flowering growth conditions (LOW, MID-LOW, MID-HIGH, and HIGH environments). Results: Although modern hybrids always presented more GYE and KNE than old hybrids, the reproductive developmental processes behind this response were different depending on the environment. Under HIGH en vironments, the KNE improvement (4.53 kernels year-1) was the result of a greater CDFE (7.55 florets year-1) and more ESE (6.01 silks year-1). Under LOW environments, the genetic progress in KNE (2.41 kernels year-1) was associated with a reduced kernel abortion (− 0.48 % year-1). Non-significant trend with year of release was observed in spikelet growth rate in all groups of evaluated environments, however, there was a significant decrease in the residual effect of the relationship between spikelet growth rate during the critical period and kernel abortion under LOW environments. Conclusions: Traits responsible for improved grain yield differed across environments because the relative importance of the determinant processes of kernel set vary across them. Under low-yielding environments, decreased kernel abortion is more beneficial than increased potential ear size (i.e., florets per ear) to enhance kernel number and grain yield. Implications or significance: This finding highlights the relevance of focusing on processes conducive to kernel abortion under stress-prone environments to improve maize grain yield.
publishDate 2023
dc.date.none.fl_str_mv 2023-11-01T15:54:46Z
2023-11-01T15:54:46Z
2023-12
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/20.500.12123/15789
https://www.sciencedirect.com/science/article/pii/S037842902300343X
0378-4290
https://doi.org/10.1016/j.fcr.2023.109150
url http://hdl.handle.net/20.500.12123/15789
https://www.sciencedirect.com/science/article/pii/S037842902300343X
https://doi.org/10.1016/j.fcr.2023.109150
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 304 : 109150. (1 December 2023)
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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