Euphytica

, Volume 169, Issue 3, pp 335–344 | Cite as

Genetic variation for early flowering, survival and growth in sugar gum (Eucalyptus cladocalyx F. Muell) in southern Atacama Desert

  • Freddy Mora
  • Roslyn Gleadow
  • Sandra Perret
  • Carlos Alberto Scapim
Article

Abstract

The aim of this study was to examine the genetic control of time-to-flowering (precocity) in 39 open-pollinated families of Eucalyptus cladocalyx in southern Atacama Desert, Chile, with the view to the selection of trees that flower earlier but with minimal impact on survival and growth. A Bayesian approach, implemented using Gibbs sampling algorithm, was used in data analyses. Precocity was assessed as a binary response at age three and was found to be highly heritable. The estimates of posterior mean and of the 95% posterior interval of the heritability were 0.51 and [0.46–0.56], respectively. Estimated genetic gain ranged from 36.15 to 41.22% (selection intensities of 14.29 and 7.48%, respectively). Total height, basal diameter and survival (measured at age 5) had a positive and relatively moderate genetic correlation with early flowering (r = 0.23, 0.29 and 0.11, respectively) indicating that selection for early flowering alone would have a moderate impact on growth and survival. Early flowering of Eucalyptus cladocalyx was found to be highly heritable in southern Atacama Desert populations, which could be used to improve the honey production in situations where flowers from native species are not available in sufficient quantities.

Keywords

Arid environmental conditions Breeding value Genetic gain Gibbs sampling Heritability 

Abbreviations

D

Diameter

EF

Early flowering

GD

Genetic diversity

GG%

Predicted genetic advance

H

Height

MCMC

Monte-Carlo Markov Chain

NSF

Number of selected families

S

Survival

Notes

Acknowledgements

The financial support for this work was provided by the Development and Innovation Fund of the Chilean Ministry of Economy. We thank farmers of the rural community of Tunga Norte. CSIRO Australian Tree Seed Centre kindly provided seeds of the Australian population used in this study.

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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • Freddy Mora
    • 1
  • Roslyn Gleadow
    • 2
  • Sandra Perret
    • 3
  • Carlos Alberto Scapim
    • 4
  1. 1.Facultad de Ciencias ForestalesUniversidad de Concepción, Victoria 631, Barrio UniversitarioConcepciónChile
  2. 2.School of Biological SciencesMonash UniversityClaytonAustralia
  3. 3.Instituto de Investigación ForestalMinisterio de Agricultura de ChileSantiagoChile
  4. 4.Departamento de AgronomiaUniversidade Estadual de MaringáMaringaBrazil

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