Abstract
This study aimed to evaluate the efficiency of early selection for parents and trees for cloning in full-sib progeny tests of Eucalyptus spp. The 61 hybrid progenies were evaluated in the north, northwest and central state of Minas Gerais, Brazil, in a randomized complete block design with three replications, in 2001. The trait circumference at breast height (CBH) was evaluated 30 and 84 months after planting in five-plant rows. The selection efficiency was assessed by the fluctuation of genetic and phenotypic parameters, coincidence index, genetic correlation, phenotypic correlation, Spearman rank correlation, correlated response, gain per year and repeatability of phenotypic values at the plant level. All methodologies indicated that early selection is effective both in the selection of parents and the selection of trees for cloning.
Highlights
One of the main economic activities in Minas Gerais state is the steel industry, which consumes large quantities of charcoal
Results indicated that the species E. camaldulensis, E. urophylla, E. cloeziana, E. terenticornis, E. pellita and Corimbia citriodora were the most promising (Andrade et al 1994)
This study aimed to evaluate the efficiency of early selection in progeny trials of Eucalyptus hybrid, both in the selection of parents as well as the selection of trees for cloning
Summary
One of the main economic activities in Minas Gerais state is the steel industry, which consumes large quantities of charcoal. This raw material is produced mainly in the north and northwestern regions of the state, where severe droughts occur. This climatic condition makes it difficult to obtain eucalyptus high-yielding clones. Efforts were directed towards the mass selection of superior plants and selection with half-sib families, leading to an improvement of the species as well as better seed quality for commercial plantations. As clonal propagation became available, the entire forestry sector turned to clonal plantations, increasing the gains with the use of this technique even more (Gonçalves et al 2001)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
