Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)

Autores
Delgado, Eber Alexander; Carabajal, Dante Edgardo; Flores, Patricia Cecilia; Soler, Neus Aletà; Gariglio, Norberto Francisco
Año de publicación
2026
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The thermal requirements of deciduous fruit trees are crucial for expanding walnut and pecan cultivation in Catamarca, a warm region in northwestern Argentina. This study evaluated the chilling requirements of two Persian walnut cultivars (‘Chandler’ and ‘Trompito INTA’) and three pecan cultivars (‘Stuart’, ‘Pawnee’, and ‘Western’). Well-lignified budsticks, one-year-old branches of 40 cm, were removed from trees twice, in the autumns of 2018 and 2019, without damaging any apical (TB) or lateral buds (LT). They were stored at 5 ± 0.5°C to accumulate chilling hours (CH) across ten treatments (0-1000 CH in 100 CH intervals) before sprouting in greenhouse conditions. Results were quantified as the mean time (days) to reach budbreak (MTB) and as the percentage of budbreak. The ‘Western’ pecan required the least chilling (300-400 CH), followed by ‘Pawnee’ (400-500 CH) and ‘Stuart’ (600-800 CH). It should be noted that the pecan tree in cvs 'Pawnee' and 'Western' sprouted without cold in the first-year trials. Considering walnut, ‘Trompito INTA’ and ‘Chandler’, showed a chilling requirement of 500 and 800 CH, respectively. Persian walnuts needed at least 200 CH to budbreak. The study shows that pecan requires less cold to reach 50% sprouting than to stabilize MTB. ‘Trompito INTA’ stands out as a Persian walnut cultivar with low chilling requirements. This cultivar may be better adapted to milder winters and could contribute to climate change adaptation in walnut-growing regions. These results are valuable for cultivar selection and planning expansion of nut orchards in warm regions of Argentina
EEA Catamarca
Fil: Delgado, Eber Alexander. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Catamarca; Argentina
Fil: Delgado, Eber Alexander. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Energía y Ambiente para el Desarrollo Sustentable (CREAS); Argentina
Fil: Carabajal, Dante Edgardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Catamarca; Argentina
Fil: Flores, Patricia Cecilia. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; Argentina
Fil: Soler, Neus Aletà. Institute of Agrifood Research and Technology; España
Fil: Gariglio, Norberto Francisco. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Instituto de Ciencias Agropecuarias del Litoral; Argentina
Fil: Gariglio, Norberto Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias Agropecuarias del Litoral; Argentina
Fuente
International Journal of Horticultural Science and Technology 14 (1) : 41-58. (January 2027)
Materia
Nuez
Pacana
Variedades
Control Ambiental
Temperatura
Catamarca
Walnuts
Juglans regia
Pecans
Carya illinoinensis
Varieties
Environmental Control
Temperature
Nuez Pecán
Nivel de accesibilidad
acceso abierto
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:20.500.12123/27149
Acceder
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oai_identifier_str oai:localhost:20.500.12123/27149
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)Delgado, Eber AlexanderCarabajal, Dante EdgardoFlores, Patricia CeciliaSoler, Neus AletàGariglio, Norberto FranciscoNuezPacanaVariedadesControl AmbientalTemperaturaCatamarcaWalnutsJuglans regiaPecansCarya illinoinensisVarietiesEnvironmental ControlTemperatureNuez PecánThe thermal requirements of deciduous fruit trees are crucial for expanding walnut and pecan cultivation in Catamarca, a warm region in northwestern Argentina. This study evaluated the chilling requirements of two Persian walnut cultivars (‘Chandler’ and ‘Trompito INTA’) and three pecan cultivars (‘Stuart’, ‘Pawnee’, and ‘Western’). Well-lignified budsticks, one-year-old branches of 40 cm, were removed from trees twice, in the autumns of 2018 and 2019, without damaging any apical (TB) or lateral buds (LT). They were stored at 5 ± 0.5°C to accumulate chilling hours (CH) across ten treatments (0-1000 CH in 100 CH intervals) before sprouting in greenhouse conditions. Results were quantified as the mean time (days) to reach budbreak (MTB) and as the percentage of budbreak. The ‘Western’ pecan required the least chilling (300-400 CH), followed by ‘Pawnee’ (400-500 CH) and ‘Stuart’ (600-800 CH). It should be noted that the pecan tree in cvs 'Pawnee' and 'Western' sprouted without cold in the first-year trials. Considering walnut, ‘Trompito INTA’ and ‘Chandler’, showed a chilling requirement of 500 and 800 CH, respectively. Persian walnuts needed at least 200 CH to budbreak. The study shows that pecan requires less cold to reach 50% sprouting than to stabilize MTB. ‘Trompito INTA’ stands out as a Persian walnut cultivar with low chilling requirements. This cultivar may be better adapted to milder winters and could contribute to climate change adaptation in walnut-growing regions. These results are valuable for cultivar selection and planning expansion of nut orchards in warm regions of ArgentinaEEA CatamarcaFil: Delgado, Eber Alexander. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Catamarca; ArgentinaFil: Delgado, Eber Alexander. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Energía y Ambiente para el Desarrollo Sustentable (CREAS); ArgentinaFil: Carabajal, Dante Edgardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Catamarca; ArgentinaFil: Flores, Patricia Cecilia. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; ArgentinaFil: Soler, Neus Aletà. Institute of Agrifood Research and Technology; EspañaFil: Gariglio, Norberto Francisco. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Instituto de Ciencias Agropecuarias del Litoral; ArgentinaFil: Gariglio, Norberto Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias Agropecuarias del Litoral; ArgentinaIranian Society of Horticultural Science2026-07-27T14:01:39Z2026-07-27T14:01:39Z2027-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/27149https://ijhst.ut.ac.ir/article_106147.html2322-14612588-3143https://doi.org/10.22059/ijhst.2025.392411.1055International Journal of Horticultural Science and Technology 14 (1) : 41-58. (January 2027)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repograntAgreement/INTA/2023-PE-L01-I062, Desarrollo sostenible para el fortalecimiento estratégico de los sistemas productivos agrobioindustriales de los valles centrales irrigados de Catamarca-La Riojainfo:eu-repograntAgreement/INTA/2023-PE-L01-I105, Generación de conocimientos, tecnologías e innovaciones para una fruticultura sostenible adaptadas al riesgo ambiental y a la mecanizacióninfo:eu-repograntAgreement/INTA/2019-RIST-E6-I226-001, Red de evaluación de cultivaresCatamarca .......... (province) (World, South America, Argentina)1001182info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2026-09-24T11:43:35Zoai:localhost:20.500.12123/27149instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2026-09-24 11:43:36.51INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)
title Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)
spellingShingle Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)
Delgado, Eber Alexander
Nuez
Pacana
Variedades
Control Ambiental
Temperatura
Catamarca
Walnuts
Juglans regia
Pecans
Carya illinoinensis
Varieties
Environmental Control
Temperature
Nuez Pecán
title_short Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)
title_full Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)
title_fullStr Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)
title_full_unstemmed Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)
title_sort Chilling Requirement: A Main Step to Get Productive Response in Walnut and Pecan Cultivars in Catamarca (Argentina)
dc.creator.none.fl_str_mv Delgado, Eber Alexander
Carabajal, Dante Edgardo
Flores, Patricia Cecilia
Soler, Neus Aletà
Gariglio, Norberto Francisco
author Delgado, Eber Alexander
author_facet Delgado, Eber Alexander
Carabajal, Dante Edgardo
Flores, Patricia Cecilia
Soler, Neus Aletà
Gariglio, Norberto Francisco
author_role author
author2 Carabajal, Dante Edgardo
Flores, Patricia Cecilia
Soler, Neus Aletà
Gariglio, Norberto Francisco
author2_role author
author
author
author
dc.subject.none.fl_str_mv Nuez
Pacana
Variedades
Control Ambiental
Temperatura
Catamarca
Walnuts
Juglans regia
Pecans
Carya illinoinensis
Varieties
Environmental Control
Temperature
Nuez Pecán
topic Nuez
Pacana
Variedades
Control Ambiental
Temperatura
Catamarca
Walnuts
Juglans regia
Pecans
Carya illinoinensis
Varieties
Environmental Control
Temperature
Nuez Pecán
dc.description.none.fl_txt_mv The thermal requirements of deciduous fruit trees are crucial for expanding walnut and pecan cultivation in Catamarca, a warm region in northwestern Argentina. This study evaluated the chilling requirements of two Persian walnut cultivars (‘Chandler’ and ‘Trompito INTA’) and three pecan cultivars (‘Stuart’, ‘Pawnee’, and ‘Western’). Well-lignified budsticks, one-year-old branches of 40 cm, were removed from trees twice, in the autumns of 2018 and 2019, without damaging any apical (TB) or lateral buds (LT). They were stored at 5 ± 0.5°C to accumulate chilling hours (CH) across ten treatments (0-1000 CH in 100 CH intervals) before sprouting in greenhouse conditions. Results were quantified as the mean time (days) to reach budbreak (MTB) and as the percentage of budbreak. The ‘Western’ pecan required the least chilling (300-400 CH), followed by ‘Pawnee’ (400-500 CH) and ‘Stuart’ (600-800 CH). It should be noted that the pecan tree in cvs 'Pawnee' and 'Western' sprouted without cold in the first-year trials. Considering walnut, ‘Trompito INTA’ and ‘Chandler’, showed a chilling requirement of 500 and 800 CH, respectively. Persian walnuts needed at least 200 CH to budbreak. The study shows that pecan requires less cold to reach 50% sprouting than to stabilize MTB. ‘Trompito INTA’ stands out as a Persian walnut cultivar with low chilling requirements. This cultivar may be better adapted to milder winters and could contribute to climate change adaptation in walnut-growing regions. These results are valuable for cultivar selection and planning expansion of nut orchards in warm regions of Argentina
EEA Catamarca
Fil: Delgado, Eber Alexander. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Catamarca; Argentina
Fil: Delgado, Eber Alexander. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Regional de Energía y Ambiente para el Desarrollo Sustentable (CREAS); Argentina
Fil: Carabajal, Dante Edgardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Catamarca; Argentina
Fil: Flores, Patricia Cecilia. Universidad Nacional de Rosario. Facultad de Ciencias Agrarias; Argentina
Fil: Soler, Neus Aletà. Institute of Agrifood Research and Technology; España
Fil: Gariglio, Norberto Francisco. Universidad Nacional del Litoral. Facultad de Ciencias Agrarias. Instituto de Ciencias Agropecuarias del Litoral; Argentina
Fil: Gariglio, Norberto Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencias Agropecuarias del Litoral; Argentina
description The thermal requirements of deciduous fruit trees are crucial for expanding walnut and pecan cultivation in Catamarca, a warm region in northwestern Argentina. This study evaluated the chilling requirements of two Persian walnut cultivars (‘Chandler’ and ‘Trompito INTA’) and three pecan cultivars (‘Stuart’, ‘Pawnee’, and ‘Western’). Well-lignified budsticks, one-year-old branches of 40 cm, were removed from trees twice, in the autumns of 2018 and 2019, without damaging any apical (TB) or lateral buds (LT). They were stored at 5 ± 0.5°C to accumulate chilling hours (CH) across ten treatments (0-1000 CH in 100 CH intervals) before sprouting in greenhouse conditions. Results were quantified as the mean time (days) to reach budbreak (MTB) and as the percentage of budbreak. The ‘Western’ pecan required the least chilling (300-400 CH), followed by ‘Pawnee’ (400-500 CH) and ‘Stuart’ (600-800 CH). It should be noted that the pecan tree in cvs 'Pawnee' and 'Western' sprouted without cold in the first-year trials. Considering walnut, ‘Trompito INTA’ and ‘Chandler’, showed a chilling requirement of 500 and 800 CH, respectively. Persian walnuts needed at least 200 CH to budbreak. The study shows that pecan requires less cold to reach 50% sprouting than to stabilize MTB. ‘Trompito INTA’ stands out as a Persian walnut cultivar with low chilling requirements. This cultivar may be better adapted to milder winters and could contribute to climate change adaptation in walnut-growing regions. These results are valuable for cultivar selection and planning expansion of nut orchards in warm regions of Argentina
publishDate 2026
dc.date.none.fl_str_mv 2026-07-27T14:01:39Z
2026-07-27T14:01:39Z
2027-01
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/20.500.12123/27149
https://ijhst.ut.ac.ir/article_106147.html
2322-1461
2588-3143
https://doi.org/10.22059/ijhst.2025.392411.1055
url http://hdl.handle.net/20.500.12123/27149
https://ijhst.ut.ac.ir/article_106147.html
https://doi.org/10.22059/ijhst.2025.392411.1055
identifier_str_mv 2322-1461
2588-3143
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repograntAgreement/INTA/2023-PE-L01-I062, Desarrollo sostenible para el fortalecimiento estratégico de los sistemas productivos agrobioindustriales de los valles centrales irrigados de Catamarca-La Rioja
info:eu-repograntAgreement/INTA/2023-PE-L01-I105, Generación de conocimientos, tecnologías e innovaciones para una fruticultura sostenible adaptadas al riesgo ambiental y a la mecanización
info:eu-repograntAgreement/INTA/2019-RIST-E6-I226-001, Red de evaluación de cultivares
dc.rights.none.fl_str_mv 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)
eu_rights_str_mv openAccess
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.coverage.none.fl_str_mv Catamarca .......... (province) (World, South America, Argentina)
1001182
dc.publisher.none.fl_str_mv Iranian Society of Horticultural Science
publisher.none.fl_str_mv Iranian Society of Horticultural Science
dc.source.none.fl_str_mv International Journal of Horticultural Science and Technology 14 (1) : 41-58. (January 2027)
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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