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Tree Genetics & Genomes

, Volume 10, Issue 3, pp 711–719 | Cite as

Bayesian estimation of genetic parameters for growth, stem straightness, and survival in Eucalyptus globulus on an Andean Foothill site

  • Freddy Mora
  • Nicolle Serra
Original Paper

Abstract

Knowledge of the genetic variation of key economic traits in Eucalyptus globulus under cold conditions is crucial to the genetic improvement of environmental tolerances and other economic traits. A Bayesian analysis of genetic parameters for quantitative traits was carried out in 37 E. globulus open-pollinated families under cold conditions in southern Chile. The trial is located in the Andean foothills, in the Province of Bío-Bío. The Bayesian approach was performed using Gibbs sampling algorithm. Multi-trait linear and threshold models were fitted to phenotypic data (growth traits, survival, and stem straightness). Fifteen years after planting, height, diameter at breast height, and stem volume were found to be weakly to moderately heritable with Bayesian credible intervals (probability of 90 %): \( {\widehat{h}}^2 \) = 0.009–0.102, \( {\widehat{h}}^2 \) = 0.031–0.185, and \( {\widehat{h}}^2 \) = 0.045–0.205, respectively. Stem straightness was found to be weakly to moderately heritable ranging from 0.032 to 0.208 (Bayesian 90 % credible interval); posterior mode \( {\widehat{h}}^2 \) = 0.091. Tree survival at age of 15 years was high in the trial (84.8 %) with such heritability values ranging from 0.072 to 0.157. Survival was non-significantly genetically correlated to growth and stem straightness. Stem volume had the highest predicted genetic gains ranging from 17.9 to 23.7 % (selection rate of 15.8 and 8.3 %, respectively). The results of this study confirm the potential for selective breeding of this eucalypt in areas of southern Chile where cold is a significant constraint.

Keywords

Cold environments Genetic gain Heritability Breeding values Gibbs sampling 

Notes

Data archiving statement

We followed standard Tree Genetics and Genomes policy. In addition, supplementary information of the trial and family numbers are listed in Supplemental File 1.

Supplementary material

11295_2014_716_MOESM1_ESM.xlsx (60 kb)
Supplemental File 1 (XLSX 59 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Instituto de Biología Vegetal y BiotecnologíaUniversidad de TalcaTalcaChile
  2. 2.Semillas Imperial SpALos ÁngelesChile

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