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Harry Wu and Milos Ivkovich

Breeding For Wood Quality And End-Products in Radiata Pine: Adverse Genetic Correlation and Economic Weights. Harry Wu and Milos Ivkovich. IUFRO All Division 5 Conference, Taipei, 2007. Content. The issues arising from previous breeding in radiata pine

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Harry Wu and Milos Ivkovich

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  1. Breeding For Wood Quality And End-Products in Radiata Pine: Adverse Genetic Correlation and Economic Weights Harry Wu and Milos Ivkovich IUFRO All Division 5 Conference, Taipei, 2007

  2. Content • The issues arising from previous breeding in radiata pine • Adverse genetic correlation between wood quantity and quality traits in radiata pine • Strategies of breeding to address adverse genetic correlation

  3. Genetic gain from breeding for growth and form in radiata pine G1. 30% realized genetic gain ($1,395m NPV rotation)G2. 11% predicted genetic gain ($511m NPV rotation) Trees from native stands Trees from 1st gen. progeny Trees from 2st gen. progeny

  4. Adverse genetic correlation between juvenile wood quality traits and growth traits in the progeny of 2nd generation breeding population • -0.6, 0.27, -0.59 between growth and density, MfA, and MoE

  5. Adverse effect on stiffness from selection on growth in radiata pine population

  6. Genetic Parameters • 55 publications in radiata pine • 1960-2007 • 11 traits with focus on wood quality • DEN MfA MoE SGA SRG FBL DBH STS BRA BRS BRC • Heritability and genetic correlation

  7. Genetic correlation between DBH and wood density in radiata pine 13 Pub. 64 estimates, 94% negative Range -1.08 - 0.60

  8. Wood Density 25 Pub. 244 Estimates Range 0-1.21, Mean=0.59, Median=0.64,

  9. MfA 5 Pub. 122 Estimates Range 0-1.15, Mean=0.61, Median=0.62

  10. MoE 8 Pub. 134 Estimates Range 0.04-0.85, Mean=0.49, Median=0.51

  11. Summary of Heritability

  12. Strategies dealing with adverse genetic correlation • Develop economic breeding objective (weights) • Dissect genetic base of the adverse correlation and developing purging strategy

  13. -$4 Developing breeding objective Breeding for profit – which is the best tree?? $9 $14 $12 $10 $7

  14. Developing breeding objective Biological Values Economic Values BIO-ECONOMIC MODEL Economic Weight of Target Traits

  15. Link Relate Wood properties Structural grades Resource Product Sawing study and resource evaluation

  16. Breeding objective traits and their economic weights

  17. Genetic gain with selection intensity 1/10

  18. Genetic gain for radiata pine population (based on economic breeding objective and genetic parameters)

  19. Further studies addressing adverse genetic correlation • Juvenile Wood Initiative • Genetic bases of negative genetic correlation • Developing breeding and deployment strategies using a VIRTUE GENE • Deterministic model • Locus-based model • Silviculture + Genetics

  20. Thanks

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