Decay%20resistance%20of%20Scots%20pine%20wood

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Decay resistance of Scots pine wood

• Anni Harju and Martti Venäläinen
• Punkaharju Research Station

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1. Introduction

• 1. Introduction
• 2. Aims of the study
• 3. Material and methods
• 4. Results
• 5. Conclusions

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2. Aims of the study

• To answer the questions
• What is the range of phenotypic variation in the
  resistance of Scots pine wood against a brown-rot
  fungus?
• Is there genetic variation in the resistance of
  Scots pine wood against a brown-rot fungus?

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3. Material and methods
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Increment core from Scots pine
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Sampling

• Progeny tests
• Kerimäki (30 yrs)
• 25 half-sib families, 10 sibs/family
• Korpilahti (30 yrs)
• 26 half-sib families, 16 sibs/ family
• Clone archive
• Punkaharju (30 yrs.)
• 20 clones, 2 grafts/clone
• offspring growing at Korpilahti progeny test
• ? regression of offspring on their
  parents

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Malt agar plate decay test

• Duration 6 weeks
• Measurement
• ? weight loss of the wood specimen
• phenotypic variation
• h2, CVA

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4. Results
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Weight loss, Kerimäki
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Weight loss in a decay test (mg/cm3)
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A view over Kerimäki progeny test
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Weight loss, Korpilahti
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Weight loss in a decay test (mg/cm3)
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5. Conclusions
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• It seems possible to perform selective breeding
  to increase wood decay resistance
• Role of environmental factors remains unclear for
  the moment
• Growth habit of a tree may have an influence on
  the decay resistance
• reaction wood?
• Decay resistance a complicated combination of
  traits that are poorly known

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Project organization

• Finnish Forest Cluster Research Programme WOOD
  WISDOM (1998-2001), which lasts to the end of
  April
• Project
• Estimation of genetic variation in decay
  resistance of wood and development of
  non-destructive methods for evaluation of wood
  decay
• Subproject
• Genetic variation of decay resistance in Scots
  pine and Siberian larch wood

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Division of labour

• METLA
• Planning of the sampling scheme
• Sampling of the increment cores
• Analysis of the data
• VTT, Building and Transport
• in vitro decay tests
• IRG-reports
• Academy of Finland
• financing

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• Researchers
• METLA
• (Egbert Beuker)
• Pirkko Velling
• Martti Venäläinen
• Anni Harju
• VTT
• Hannu Viitanen