Minimizing inter-genotypic competition effects to predict genetic values and selection in forestry genetic tests
DOI:
https://doi.org/10.1590/S0103-90162011000600011Palabras clave:
Eucalyptus spp., covariable analysis, selection gainsResumen
The effect of competition is an important source of variation in breeding experiments. This study aimed to compare the selection of plants of open-pollinated families of Eucalyptus with and without the use of competition covariables. Genetic values were determined for each family and tree and for the traits height, diameter at breast height and timber volume in a randomized block design, resulting in the variance components, genetic parameters, selection gains, effective size and selection coincidence, with and without the use of covariables. Intergenotypic competition is an important factor of environmental variation. The use of competition covariables generally reduces the estimates of variance components and influences genetic gains in the studied traits. Intergenotypic competition biases the selection of open-pollinated eucalypt progenies, and can result in an erroneous choice of superior genotypes; the inclusion of covariables in the model reduces this influence.Descargas
Los datos de descarga aún no están disponibles.
Descargas
Publicado
2011-12-01
Número
Sección
Genetics and Plant Breeding
Licencia
Todo el contenido de la revista, excepto donde esté identificado, está protegido por el Creative Commons del tipo BY-NCCómo citar
Minimizing inter-genotypic competition effects to predict genetic values and selection in forestry genetic tests . (2011). Scientia Agricola, 68(6), 671-678. https://doi.org/10.1590/S0103-90162011000600011