Vegetative propagation of patagonian cypress, a vulnerable species from the subantarctic forest of South America
Increasing risks of loosing forest genetic resources and the need for a sustainable quality wood supply make focusing research efforts on undomesticated tree species necessary. The study of their genetic variation in vegetative propagation ability and the development of practical methodologies to...
| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Universidad Austral de Chile
2020
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/7228 https://scielo.conicyt.cl/pdf/bosque/v30n1/art04.pdf http://dx.doi.org/10.4067/S0717-92002009000100004 |
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| author | Aparicio, Alejandro Gabriel Pastorino, Mario Juan Martinez Meier, Alejandro Gallo, Leonardo Ariel |
| author_browse | Aparicio, Alejandro Gabriel Gallo, Leonardo Ariel Martinez Meier, Alejandro Pastorino, Mario Juan |
| author_facet | Aparicio, Alejandro Gabriel Pastorino, Mario Juan Martinez Meier, Alejandro Gallo, Leonardo Ariel |
| author_sort | Aparicio, Alejandro Gabriel |
| collection | INTA Digital |
| description | Increasing risks of loosing forest genetic resources and the need for a sustainable quality wood supply make focusing research efforts
on undomesticated tree species necessary. The study of their genetic variation in vegetative propagation ability and the development
of practical methodologies to obtain genetic copies are essential tools for conservation and breeding programs. patagonian cypress
Austrocedrus chilensis is a vulnerable conifer native to the subantarctic forest of South America, with high ecological importance
and economical potential. Its genetic diversity, mostly sheltered within unprotected populations, is seriously threatened. This work
examined the ability of different genotypes of A. chilensis from xeric, mesic and humid populations to propagate asexually by stem
rooting and scion grafting. The influence of exogenous auxins, season of cutting collection, ontogenetic stage of the donor plants,
grafting season, and type of scions, was analyzed. Stem rooting ability was found to be poor both for adult (average = 0.27%) and
juvenile ortets (average = 2.10%). Only one treatment, a juvenile progeny from a xeric provenance, showed remarkable results with
33.33% of rooting capacity. Grafting showed good results in early spring experiment using vigorous semi-hardwood scions, with an
average of 80.95% of successful grafts. Compatibility between genotypes from different provenances used as scion and rootstock
was found to be wide. These results indicate that although A. chilensis is a difficult-to-root species, its vegetative propagation by
means of scion grafting is feasible using low cost technology |
| format | Artículo |
| id | INTA7228 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Universidad Austral de Chile |
| publisherStr | Universidad Austral de Chile |
| record_format | dspace |
| spelling | INTA72282020-05-12T15:46:19Z Vegetative propagation of patagonian cypress, a vulnerable species from the subantarctic forest of South America Propagación vegetativa del ciprés de la cordillera, una especie vulnerable del bosque subantártico de Sudamérica Aparicio, Alejandro Gabriel Pastorino, Mario Juan Martinez Meier, Alejandro Gallo, Leonardo Ariel Recursos Genéticos Forestales Forest Genetic Resources Madera Wood Austrocedrus Cupressus Bosques Forests Austrocedrus Chilensis Ciprés de la Cordillera Región Patagónica Scion Grafting Stem Rooting Increasing risks of loosing forest genetic resources and the need for a sustainable quality wood supply make focusing research efforts on undomesticated tree species necessary. The study of their genetic variation in vegetative propagation ability and the development of practical methodologies to obtain genetic copies are essential tools for conservation and breeding programs. patagonian cypress Austrocedrus chilensis is a vulnerable conifer native to the subantarctic forest of South America, with high ecological importance and economical potential. Its genetic diversity, mostly sheltered within unprotected populations, is seriously threatened. This work examined the ability of different genotypes of A. chilensis from xeric, mesic and humid populations to propagate asexually by stem rooting and scion grafting. The influence of exogenous auxins, season of cutting collection, ontogenetic stage of the donor plants, grafting season, and type of scions, was analyzed. Stem rooting ability was found to be poor both for adult (average = 0.27%) and juvenile ortets (average = 2.10%). Only one treatment, a juvenile progeny from a xeric provenance, showed remarkable results with 33.33% of rooting capacity. Grafting showed good results in early spring experiment using vigorous semi-hardwood scions, with an average of 80.95% of successful grafts. Compatibility between genotypes from different provenances used as scion and rootstock was found to be wide. These results indicate that although A. chilensis is a difficult-to-root species, its vegetative propagation by means of scion grafting is feasible using low cost technology Los crecientes riesgos de pérdida de recursos genéticos forestales y la necesidad de una producción sostenible de madera de calidad hacen necesario orientar la investigación hacia especies arbóreas nativas no domesticadas. Para rescatar la diversidad genética amenazada y como una importante herramienta para el mejoramiento genético, resulta necesario estudiar la capacidad de las especies para propagarse vegetativamente, así como desarrollar técnicas para obtener copias genéticas. El ciprés de la cordillera (Austrocedrus chilensis) es una conífera vulnerable del bosque subantártico de Sudamérica, de gran importancia ecológica y potencial económico. Su diversidad genética se encuentra seriamente amenazada. En este trabajo se examinó la capacidad de diferentes genotipos de poblaciones xéricas, mésicas y húmedas de A. chilensis, para propagarse asexualmente por enraizado de estacas y por injertos. Se analizó además la influencia de auxinas exógenas, de la estación de colecta, del estadio ontogénico de las plantas donantes, de la estación de injerto y del tipo de púa. La capacidad de enraizado fue muy pobre, tanto para ortets adultos (promedio = 0,27%) como para juveniles (promedio = 2,10%). Sólo una progenie juvenil de procedencia xérica mostró resultados remarcables, con 33% de enraizado. Los injertos mostraron buenos resultados a comienzos de primavera usando esquejes vigorosos y semileñosos, con un 80,95% de prendimiento. La compatibilidad entre genotipos de diferentes procedencias usados como púa y portainjertos fue amplia. Estos resultados indican que aunque A. chilensis es una especie de difícil enraizado, su propagación por injertos es factible utilizando tecnología de bajo costo. Estación Experimental Agropecuaria Bariloche Fil: Aparicio, Alejandro Gabriel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área de Recursos Forestales. Unidad de Genética Forestal; Argentina Fil: Pastorino, Mario Juan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área de Recursos Forestales. Unidad de Genética Forestal. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Martinez Meier, Alejandro. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área de Recursos Forestales. Unidad de Genética Forestal; Argentina Fil: Gallo, Leonardo Ariel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Bariloche. Área de Recursos Forestales. Unidad de Genética Forestal; Argentina 2020-05-12T15:29:54Z 2020-05-12T15:29:54Z 2009 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/7228 https://scielo.conicyt.cl/pdf/bosque/v30n1/art04.pdf 0304-8799 0717-9200 (Online) http://dx.doi.org/10.4067/S0717-92002009000100004 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 Universidad Austral de Chile Bosque [Valdivia] 30 (1) : 18-26. (2009) |
| spellingShingle | Recursos Genéticos Forestales Forest Genetic Resources Madera Wood Austrocedrus Cupressus Bosques Forests Austrocedrus Chilensis Ciprés de la Cordillera Región Patagónica Scion Grafting Stem Rooting Aparicio, Alejandro Gabriel Pastorino, Mario Juan Martinez Meier, Alejandro Gallo, Leonardo Ariel Vegetative propagation of patagonian cypress, a vulnerable species from the subantarctic forest of South America |
| title | Vegetative propagation of patagonian cypress, a vulnerable species from the subantarctic forest of South America |
| title_full | Vegetative propagation of patagonian cypress, a vulnerable species from the subantarctic forest of South America |
| title_fullStr | Vegetative propagation of patagonian cypress, a vulnerable species from the subantarctic forest of South America |
| title_full_unstemmed | Vegetative propagation of patagonian cypress, a vulnerable species from the subantarctic forest of South America |
| title_short | Vegetative propagation of patagonian cypress, a vulnerable species from the subantarctic forest of South America |
| title_sort | vegetative propagation of patagonian cypress a vulnerable species from the subantarctic forest of south america |
| topic | Recursos Genéticos Forestales Forest Genetic Resources Madera Wood Austrocedrus Cupressus Bosques Forests Austrocedrus Chilensis Ciprés de la Cordillera Región Patagónica Scion Grafting Stem Rooting |
| url | http://hdl.handle.net/20.500.12123/7228 https://scielo.conicyt.cl/pdf/bosque/v30n1/art04.pdf http://dx.doi.org/10.4067/S0717-92002009000100004 |
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