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- Minimizing inter-genotypic competition effects to predict genetic values and selection in forestry genetic tests
- Universidade Federal do Piauí (UFPI)
- Universidade Estadual Paulista (UNESP)
- Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF)
- Fibria S/A Celulose
- 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.
- Scientia Agricola. São Paulo - Escola Superior de Agricultura Luiz de Queiroz, v. 68, n. 6, p. 671-678, 2011.
- Universidade de São Paulo (USP), Escola Superior de Agricultura Luiz de Queiroz (ESALQ)
- Eucalyptus spp
- covariable analysis
- selection gains
- Acesso aberto
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