Otro
Minimizing inter-genotypic competition effects to predict genetic values and selection in forestry genetic tests
Registro en:
Scientia Agricola. São Paulo - Escola Superior de Agricultura Luiz de Queiroz, v. 68, n. 6, p. 671-678, 2011.
0103-9016
10.1590/S0103-90162011000600011
S0103-90162011000600011
WOS:000298334200011
S0103-90162011000600011.pdf
Autor
Pavan, Bruno Ettore
Paula, Rinaldo César de
Perecin, Dilermando
Candido, Liliam Silvia
Scarpinati, Edimar Aparecido
Resumen
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.