African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12191

Full Length Research Paper

Early selection in Eucalyptus camaldulensis Dehnh. progenies in Savanna, Brazil

Mariana de Moura Queiroz
  • Mariana de Moura Queiroz
  • Forestry and Environmental Sciences Graduation Program – UFMT, Cuiabá/MT, Brazil.
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Daniele Aparecida Alvarenga Arriel
  • Daniele Aparecida Alvarenga Arriel
  • Department of Forest Engineering, Faculty of Forestry – UFMT, Cuiabá/MT, Brazil.
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Antônio de Arruda Tsukamoto Filho
  • Antônio de Arruda Tsukamoto Filho
  • Department of Forest Engineering, Faculty of Forestry – UFMT, Cuiabá/MT, Brazil.
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Oacy Eurcio de Oliveira
  • Oacy Eurcio de Oliveira
  • Federal Institute of Education, Science and Technology of Mato Grosso – IFMT, São Vicente/MT, Brazil.
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Paula Martin de Moraes
  • Paula Martin de Moraes
  • Local Development Postgraduate Program – UCDB, Campo Grande/MS, Brazil.
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Leandro Skowronski
  • Leandro Skowronski
  • Environmental Sciences and Agricultural Sustainability Postgraduate Program – UCDB, Campo Grande/MS, Brazil.
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Reginaldo Brito da Costa
  • Reginaldo Brito da Costa
  • Local Development Postgraduate Program – UCDB, Campo Grande/MS, Brazil.
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  •  Received: 12 December 2018
  •  Accepted: 22 March 2019
  •  Published: 17 April 2019

Abstract

Genetic parameters were assessed and correlated to evaluate the feasibility of early selection for diameter at breast height (DBH) and total height (TH) in a half-sib progenies test of Eucalyptus camaldulensis. The test is established in the Santo Antônio do Leverger municipality, Mato Grosso State, Brazil, with 132 progenies, five blocks and three plants per plot at 3 x 2 m spacing. REML/BLUP procedure was applied at three and six years of age of trees for estimation. Analysis of deviance revealed no significance for progeny effects for variable TH in both age groups. Genetic parameters were of low magnitude and gains were almost zero. However, for variable DBH, significance in the analysis of deviance was recorded. The accuracies were of high magnitude and there was low heritability variation for the assessed ages. Gains with direct selection for DBH were 38.03% (DBH 3) and 34.86% (DBH 6), the genetic correlation between the two ages was high and positive (0.958) and the indirect selection gain was 33.65%, indicating a situation favourable to early selection. The results will subsidize the first breeding program of E. camaldulensis in the Mato Grosso State.

 

Key words: Forest tree improvement, half-sib progenies, indirect selection.