Expected genetic gain in Acacia mangium in Los Chiles, northern of Costa Rica
An Acacia mangium Willd. progeny test conformed by 25 families from six derivate provenances was evaluated. The trial was established in San Carlos, northern from Costa Rica in year 2006, and evaluated in 2007 and in 2010. Genetic material came from breeding selections obtained by GENFORES, a tree i...
| Autores Principales: | Pavlotzky-Blank, Benjamín, Murillo-Gamboa, Olman |
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| Formato: | Artículo |
| Idioma: | Español |
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Editorial Tecnológica de Costa Rica
2013
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| Acceso en línea: |
https://revistas.tec.ac.cr/index.php/kuru/article/view/1320 http://hdl.handle.net/2238/12576 |
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RepoTEC125762021-06-08T22:00:54Z Expected genetic gain in Acacia mangium in Los Chiles, northern of Costa Rica Ganancia genética esperada en Acacia mangium en San Carlos, Zona Norte de Costa Rica Pavlotzky-Blank, Benjamín Murillo-Gamboa, Olman mejoramiento genético procedencias progenie correlación genética Acacia mangium San Carlos Costa Rica tree improvement provenances progeny test genetic correlations Acacia mangium San Carlos Costa Rica An Acacia mangium Willd. progeny test conformed by 25 families from six derivate provenances was evaluated. The trial was established in San Carlos, northern from Costa Rica in year 2006, and evaluated in 2007 and in 2010. Genetic material came from breeding selections obtained by GENFORES, a tree improvement and gene conservation cooperative, in Costa Rica and Colombia. Each family was represented by 48 progenies, randomly distributed in four pairs within each of the six blocks of the trial. In 2010, DBH, survival rate, merchantable number of logs per tree, forking presence, forking height and log quality in the first four logs were evaluated. Based on these measurements, wood commercial volume per tree and hectare was estimated. Data was analyzed with SELEGEN software in order to obtain all genetic parameters from the breeding population. All traits, except survival rate, showed family mean heritability values over 0.62. Genetic gain in commercial volume per hectare was estimated as 31.24 %, when selecting as progenitors the two best individuals from the top 12 families at four-year old, which corresponds to an estimated commercial volume/ha at this age of 67.89 m3/ha, based on a growth rate of 16.97 m3/ha/year. The two Colombian provenances were significantly superior to the rest of the evaluated materials. Genetic correlations among traits showed that diameter growth rate is early expressed in this tree species, and therefore, could be used in future selections. Se evaluó un ensayo de progenie de Acacia mangium conformado por 25 familias provenientes de seis procedencias derivadas. El ensayo fue establecido en San Carlos, zona norte de Costa Rica, en el año 2006 y evaluado en el 2007 y en el 2010. Se utilizó material genético seleccionado por GENFORES, Cooperativa de Conservación y Mejoramiento Genético Forestal, en Costa Rica y Colombia. Cada familia estuvo representada por 48 progenies, plantadas en cuatro parejas distribuidas en forma aleatoria dentro de cada uno de los seis bloques del ensayo. En 2007 se midió el diámetro a la altura del pecho (dap), en 2010 se midió dap y se calculó el incremento diamétrico, número de trozas comerciales, presencia de bifurcación, altura de bifurcación y la calidad de las primeras cuatro trozas; además, se evaluó la adaptabilidad al sitio. Con las mediciones se determinó el volumen de madera comercial por árbol y hectárea. Los datos fueron analizados por medio del software SELEGEN, para obtener los parámetros genéticos. Todos los caracteres, excepto adaptabilidad, registraron valores de heredabilidad media familiar superiores a 0,62. Si se seleccionaran los dos mejores individuos dentro de las mejores 12 familias, se obtendría una ganancia genética del 31,24 % en volumen comercial/ha a los cuatro años de edad. Esta ganancia correspondería a un volumen comercial en troza de 67,89 m3/ha, a una tasa de 16,97 m3/ha/año. Las procedencias derivadas de Colombia fueron superiores significativamente a los demás materiales evaluados. El análisis de correlación genética entre caracteres mostró que la tasa de crecimiento diamétrico se expresa desde temprana edad en esta especie, lo que podría ser utilizado a futuro en una selección a menor edad. 2013-04-25 2021-06-08T22:00:54Z 2021-06-08T22:00:54Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://revistas.tec.ac.cr/index.php/kuru/article/view/1320 10.18845/rfmk.v10i24.1320 http://hdl.handle.net/2238/12576 spa https://revistas.tec.ac.cr/index.php/kuru/article/view/1320/1223 application/pdf Editorial Tecnológica de Costa Rica Revista Forestal Mesoamericana Kurú; Vol. 10 Núm. 24 (2013): Enero- Junio 2013; Pág. 14 - 25 2215-2504 |
| institution |
Tecnológico de Costa Rica |
| collection |
Repositorio TEC |
| language |
Español |
| topic |
mejoramiento genético procedencias progenie correlación genética Acacia mangium San Carlos Costa Rica tree improvement provenances progeny test genetic correlations Acacia mangium San Carlos Costa Rica |
| spellingShingle |
mejoramiento genético procedencias progenie correlación genética Acacia mangium San Carlos Costa Rica tree improvement provenances progeny test genetic correlations Acacia mangium San Carlos Costa Rica Pavlotzky-Blank, Benjamín Murillo-Gamboa, Olman Expected genetic gain in Acacia mangium in Los Chiles, northern of Costa Rica |
| description |
An Acacia mangium Willd. progeny test conformed by 25 families from six derivate provenances was evaluated. The trial was established in San Carlos, northern from Costa Rica in year 2006, and evaluated in 2007 and in 2010. Genetic material came from breeding selections obtained by GENFORES, a tree improvement and gene conservation cooperative, in Costa Rica and Colombia. Each family was represented by 48 progenies, randomly distributed in four pairs within each of the six blocks of the trial. In 2010, DBH, survival rate, merchantable number of logs per tree, forking presence, forking height and log quality in the first four logs were evaluated. Based on these measurements, wood commercial volume per tree and hectare was estimated. Data was analyzed with SELEGEN software in order to obtain all genetic parameters from the breeding population. All traits, except survival rate, showed family mean heritability values over 0.62. Genetic gain in commercial volume per hectare was estimated as 31.24 %, when selecting as progenitors the two best individuals from the top 12 families at four-year old, which corresponds to an estimated commercial volume/ha at this age of 67.89 m3/ha, based on a growth rate of 16.97 m3/ha/year. The two Colombian provenances were significantly superior to the rest of the evaluated materials. Genetic correlations among traits showed that diameter growth rate is early expressed in this tree species, and therefore, could be used in future selections. |
| format |
Artículo |
| author |
Pavlotzky-Blank, Benjamín Murillo-Gamboa, Olman |
| author_sort |
Pavlotzky-Blank, Benjamín |
| title |
Expected genetic gain in Acacia mangium in Los Chiles, northern of Costa Rica |
| title_short |
Expected genetic gain in Acacia mangium in Los Chiles, northern of Costa Rica |
| title_full |
Expected genetic gain in Acacia mangium in Los Chiles, northern of Costa Rica |
| title_fullStr |
Expected genetic gain in Acacia mangium in Los Chiles, northern of Costa Rica |
| title_full_unstemmed |
Expected genetic gain in Acacia mangium in Los Chiles, northern of Costa Rica |
| title_sort |
expected genetic gain in acacia mangium in los chiles, northern of costa rica |
| publisher |
Editorial Tecnológica de Costa Rica |
| publishDate |
2013 |
| url |
https://revistas.tec.ac.cr/index.php/kuru/article/view/1320 http://hdl.handle.net/2238/12576 |
| _version_ |
1796138990586298368 |
| score |
12.043273 |