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Early selection of parents and trees Eucalyptus full-sib progeny tests

Author(s): José Luis Lima | João Cândido de Souza | Magno Antônio Patto Ramalho | Hélder Bolognani Andrade | Leonardo Chagas de Sousa

Journal: Crop Breeding and Applied Biotechnology
ISSN 1518-7853

Volume: 11;
Issue: 1;
Start page: 10;
Date: 2011;
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Keywords: coincidence index | genetic correlation | correlated response | gain per year.

This study aimed to evaluate the efficiency of early selection for parents and trees for cloning in full-sib progeny testsof Eucalyptus spp. The 61 hybrid progenies were evaluated in the north, northwest and central state of Minas Gerais, Brazil, in arandomized complete block design with three replications, in 2001. The trait circumference at breast height (CBH) was evaluated30 and 84 months after planting in five-plant rows. The selection efficiency was assessed by the fluctuation of genetic and phenotypicparameters, coincidence index, genetic correlation, phenotypic correlation, Spearman rank correlation, correlated response, gainper year and repeatability of phenotypic values at the plant level. All methodologies indicated that early selection is effective both inthe selection of parents and the selection of trees for cloning.

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