Behavior of Clones of Gmelina arborea Roxb. (Melina) in Acidic Soil Conditions
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| Autores: | , , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2021 |
| Descripción: | [Introduction]: Gmelina arborea has become the second most used species in commercial reforestation in Costa Rica. [Objective]: To evaluate the behavior of G. arborea clones in acidic soil conditions. [Methodology]: A randomized complete block experimental design was used, with six replications, 29 clones, and five controls, with a distance of 4 m x 4 m. A soil analysis was performed, and genetic parameters were calculated at different ages for the variables diameter at breast height (DBH), height, and commercial volume, using the SELEGEN software, which is based on the REML/BLUP method; and genetic correlations were made between the evaluated variables. [Results]: Soil analysis showed nutritional deficiencies of essential elements for the development of melina, a pH lower than 5.5, high iron (Fe) contents, and high aluminum (Al) saturation. The highest individual and mean heritability coefficients of the clone were obtained at the age of 4.5 years, where DBH presented the highest values. The highest genetic correlations were found between the DBH and commercial volume variables from 3.5 years onwards. Ten clones showed the best adaptation to the site conditions, presenting the highest values in dasometric variables, with genetic gains in the range of 12.7 % and 28 %, compared to the general mean of the test and the material used as control. [Conclusions]: There is genetic material of melina with the potential to adapt to acidic soil conditions. |
| País: | Portal de Revistas UNA |
| Institución: | Universidad Nacional de Costa Rica |
| Repositorio: | Portal de Revistas UNA |
| Lenguaje: | Español |
| OAI Identifier: | oai:ojs.www.una.ac.cr:article/15626 |
| Acceso en línea: | https://www.revistas.una.ac.cr/index.php/ambientales/article/view/15626 |
| Palabra clave: | genetic gain, genetic improvement, genetic parameters, soil pH ganancia genética; mejoramiento genético; parámetros genéticos; pH del suelo logro genético, melhoramento genético, parâmetros genéticos, pH do solo |