Tree Genetics & Genomes

, Volume 7, Issue 3, pp 641–653 | Cite as

The influence of cambial age on breeding for wood properties in Picea glauca

  • Patrick Lenz
  • John MacKay
  • André Rainville
  • Alain Cloutier
  • Jean Beaulieu
Original Paper

Abstract

We investigated the influence of cambial age on correlations between different wood traits and the possibility of early selection in order to help decision-making for the improvement of juvenile wood in white spruce (Picea glauca (Moench) Voss). Increment cores were analysed from 375 trees covering 25 open-pollinated families from a 30-year-old provenance–progeny trial in Quebec, Canada. Genetic and phenotypic correlations between different mechanical and fibre anatomy-related wood traits were found to vary with cambial age. Most correlations became stronger in magnitude in rings closer to the bark. An exception is the correlation between microfibril angle (MFA) and the modulus of elasticity where correlations were strongly negative from the pith to the bark. Age–age correlations for different wood traits were found to be high and possible gains from early selection were estimated to be good in ring 8 and older for most traits. MFA was the trait with the strongest potential for selection as early as ring 4, but a detrimental correlation with wood density may represent a drawback of such a juvenile selection approach. Estimates showed that selection concentrated on a few easily measurable traits such as wood density and core length holds promise to obtain superior genetic gains for mechanical properties, but negative impacts would be expected on fibre anatomy traits related to pulp quality. These findings show the need for more carefully planned breeding and selection strategies if one wishes to improve several traits for different end uses.

Keywords

Wood properties Genetic correlations Selection efficiency Picea glauca (Moench) Voss Cambial age 

Notes

Acknowledgements

The authors thank D. Plourde, É. Dussault and P. Labrie (Natural Resources Canada) for field assistance, the EvalueTree laboratory at FPInnovations for SilviScan analysis and S. Clement, P.L. Poulin and S.Yuen for their help in database management. Funding was provided by FQRNT (Fonds Québecois de Recherche sur la Nature et les Technologies) to AC, JB and JM; Genome Canada and Génome Québec for the Arborea project to JB and JM; the Canadian Wood Fibre Centre to JB; and NSERC (Natural Sciences and Engineering Research Council of Canada) to JM. The authors would like to thank William ‘Bill’ Parsons for the manuscript revision and helpful comments.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Patrick Lenz
    • 1
    • 2
  • John MacKay
    • 1
  • André Rainville
    • 3
  • Alain Cloutier
    • 4
  • Jean Beaulieu
    • 5
  1. 1.Centre d’étude de la forêt, Département des sciences du bois et de la forêtUniversité LavalQuébecCanada
  2. 2.Centre canadien sur la fibre de bois, Service canadien des forêtsRessources naturelles CanadaQuébecCanada
  3. 3.Direction de la recherche forestièreMinistère des ressources naturelles et de la faune de QuébecQuébecCanada
  4. 4.Centre de recherche sur le bois, Département des sciences du bois et de la forêtUniversité LavalQuébecCanada
  5. 5.Centre canadien sur la fibre de bois, Service canadien des forêtsRessources naturelles CanadaQuébecCanada

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