| Revista: | Ciencia florestal |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000274162 |
| ISSN: | 0103-9954 |
| Autores: | Rocha, Rodrigo Barros1 Muro-Abad, Jupiter Israel Araujo, Elza Fernandes de2 Cruz, Cosme Damiao3 |
| Instituciones: | 1Universidade Federal de Vicosa, Vicosa, Minas Gerais. Brasil 2Universidade Federal de Vicosa, Departamento de Microbiologia, Vicosa, Minas Gerais. Brasil 3Universidade Federal de Vicosa, Departamento de Biologia Geral, Vicosa, Minas Gerais. Brasil |
| Año: | 2005 |
| Periodo: | Sep-Dic |
| Volumen: | 15 |
| Número: | 3-4 |
| Paginación: | 255-266 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental |
| Resumen en inglés | The intense genotype x environment interaction present in many cultures make studies of adaptability to specific environments an important part of vegetal improvement programs. The different response of genotypes to favorable and unfavorable environments can be studied using methodologies based on three main strategies: analysis of variance, linear regression and non-parametric statistics. This work presents a new methodology for the study of genotype environment interaction, using principal components analysis, in order to facilitate the recommendation of specific genotypes to certain environments. This methodology, called centroid method, consists in the comparison of cartesian distance values between the genotypes and four ideal references using principal components. It differs from methods based in analysis of variance due to the aiming of genotypes according to environment variation and the facility of genotype identification, dispensing the analysis of several parameters as in methods based on regression. In order to exemplify the use of this method an experiment of Eucalyptus grandis planted in random blocks design and four environments was studied. Four clones of general adaptability were identified besides others of specific adaptation that can also be recommended aiming to capitalize the interaction effect. The results of this study were compared with the ones obtained through other methodologies by Eberhart e Russel (1966) and by Lin and Binns (1988) and allows to conclude that the centroid method was efficient in the identification of differentiated performance E. grandis clones; associated to the easiness of recommendation and ordering of the genotypes into specific adaptability groups |
| Resumen en portugués | associado à facilidade de recomendação e ordenamento dos genótipos a grupos de adaptabilidade específicos |
| Disciplinas: | Agrociencias, Matemáticas |
| Palabras clave: | Silvicultura, Matemáticas aplicadas, Eucalyptus grandis, Plantaciones forestales, Método centroide, Clones, Adaptabilidad |
| Keyword: | Agricultural sciences, Mathematics, Silviculture, Applied mathematics, Eucalyptus grandis, Forest plantations, Centroid method, Clones, Adaptability |
| Texto completo: | Texto completo (Ver PDF) |
