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Pesquisa Agropecuária Brasileira

Print version ISSN 0100-204XOn-line version ISSN 1678-3921

Abstract

PAULA, Rinaldo Cesar de; PIRES, Ismael Eleotério; BORGES, Rita de Cássia Gonçalves  and  CRUZ, Cosme Damião. Prediction of genetic gains in forest improvement. Pesq. agropec. bras. [online]. 2002, vol.37, n.2, pp.159-165. ISSN 0100-204X.  http://dx.doi.org/10.1590/S0100-204X2002000200007.

Total gains predicted by various selection criteria were evaluated, based on six characteristics of growth in half-sib families of Eucalyptus camaldulensis. The simulated situation consisted of selection of 25% among 44 families studied and of 17% of the plants in these families, totalizing a selection of 4.25% of the constant individuals of the essay. The selection criteria used were: direct and indirect selection; classical index of Smith & Hazel, with four economic weights, and index of Pesek & Baker, in three situations. The criteria used were similar to each other, with a slight superiority for the classical index when the genetic variation coefficient associated with each analysed characteristic was established as the vector of economic weights.

Keywords : Eucalyptus camaldulensis; selection; selection index; genetic variation.

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