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Forests NSW
Forests NSW’ Spotted Gum (Corymbia spp.) Tree improvement and deployment strategy Michael Henson, Helen Smith, and Steve Boyton
www.dpi.nsw.gov.au
Forests NSW Forests NSW Spotted Gum ( Corymbia spp.) Tree improvement - - PowerPoint PPT Presentation
Forests NSW Forests NSW Spotted Gum ( Corymbia spp.) Tree improvement - - PowerPoint PPT Presentation
Forests NSW Forests NSW Spotted Gum ( Corymbia spp.) Tree improvement and deployment strategy Michael Henson, Helen Smith, and Steve Boyton www.dpi.nsw.gov.au Corymbia Tree Improvement Forests NSW Corymbia Plantations Breeding
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www.dpi.nsw.gov.au
Forests NSW
- 2.9 million hectares
under management
- 210,000 ha of P.
radiata
- 12,000 ha hybrid
southern pine
- 49,000 ha of
Eucalypt plantations
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www.dpi.nsw.gov.au
Spotted Gum Plantations in NSW
8000 ha of spotted gum
mainly Corymbia citroiodora
- subsp. Variegata established
in NSW. Significant amounts of C. maculata.
Spotted Gums mainly
established on poor quality low productivity sites.
SLIDE 5
www.dpi.nsw.gov.au
Spotted Gums - NSW
- C. citriodora subsp. variegata
- C. henyri
- C. maculata
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www.dpi.nsw.gov.au
Spotted Gum – Queensland
- C. citriodora subsp. citriodora
- C. torrelliana
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www.dpi.nsw.gov.au
Breeding and Deployment Strategy
AIM: PRODUCTION OF ELITE SEED FOR SEEDLING
DEPLOYMENT
Establishment of Progeny Trials
Early Health Assessments Growth Assessment at 3 – 4 Years Grafts Establishment in Clonal Seed Orchards Wood Quality Assessment 10 years Roguing of Clonal Seed Orchards
In parallel low level activity of exploring and improving
vegetative propagation methods.
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www.dpi.nsw.gov.au
Genetic Resources
Species Series Location Planted Prov Families Trees
- C. citriodora subsp. variegata (CCV)
1999-2001 Grafton Feb 01 17 88 1408
- C. citriodora subsp. variegata
1999-2001 Casino Mar 01 16 88 2640
- C. citriodora subsp. variegata
1999-2001 Casino Mar 99 38 205 4900
- C. citriodora subsp. variegata
1999-2001 Casino Apr 99 1 17 550
- C. citriodora subsp. variegata
2001 Quirindi Oct 01 19 120 2400
- C. citriodora subsp. variegata
2004 Grafton Feb 04 60 548 6600
- C. citriodora subsp. variegata
2004 Grafton Mar 04 58 528 6336
- C. citriodora subsp. variegata
2004 Casino Mar 04 58 544 9792
- C. maculata
2004 Singleton Apr 04 12 133 2800
- C. maculata
2004 Casino Mar 04 12 134 2680
- C. maculata
2006 Grafton Nov 06 11 98 2000
- C. citriodora subsp. citriodora ()
2006 Grafton Nov 06 5 24 500 CCV, C. maculata 2003 Quirindi Sep 03 5 Genetic gain 1600 CCV, C. torelliana 2004 Casino Apr 04 7 32 2176 CCV, , C. henryi 2006 Grafton Oct 06 80 319 6000 CCV, , C. maculata, C. henryi 2007 Casino Oct 07 Approx.400
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www.dpi.nsw.gov.au
Forests NSW – Pedigreed Trials
GENETIC RESOURCES
Corymbia citriodora subsp. citriodora Corymbia citriodora subsp. variegata Corymbia henyrii Corymbia maculata Corymbia torelliana
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www.dpi.nsw.gov.au
Breeding Objectives
Productivity – Growth Quality – Fit for Purpose Adaptability – Security
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www.dpi.nsw.gov.au
Quality
Fit for Purpose Early Age Wood Properties Dimensional Stability Form Kino production considerable risk
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www.dpi.nsw.gov.au
Adaptability
Frost Ramularia Shoot Blight
(RSB) – Quambalaria pitereka - MOST SIGNIFCIANT BOTTLENECK TO COMMERCIAL ESTABLISHMENT
Erinose mites (Rhombacus
sp.)
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www.dpi.nsw.gov.au
Erinose Mite Damage
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www.dpi.nsw.gov.au
Genetic Control
Corymbia citriodora subsp. variegata (99-01 Series)
Height @ 40 months – h2= 0.153 to 0.272 RSB @ 25 months – h2= 0.533 (0.116)
Corymbia citriodora subsp. variegata (2004 Series)
RSB @ 25 months – h2= 0.347 (0.076)
Corymbia maculata
Height @ 23 months – h2= 0.421 (0.075) RSB @ 23 months – h2= 0.564 (0.089)
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www.dpi.nsw.gov.au
RSB Tolernance Variation
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www.dpi.nsw.gov.au
Hybrid Development in NSW
Hybrid 2nd Priority Watching Brief – high risk, high cost and not proven Evaluating Brazilian and Queensland Material –
Propagation and Field Performance
Rooting similar to that of pure CCV Clones <50%and
erratic.
Identification and Capture Established 2 small hybridising orchards Supporting genetic pollution studies and risk management
plan development
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www.dpi.nsw.gov.au
Hybrid
Benefits
RSB Tolerance Frost Tolerance Improved Growth??
Risks
Cost of Development Cost of Deployment on low
productivity sites
Unknown rotation age performance Market acceptability and wood
properties
Large crown (Leaf Area) on driest
sites
- C. torrelliana declared weed in some
Shires
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www.dpi.nsw.gov.au
Economics of the Hybrid
Assumptions: discount rate 7%; seedling cost $0.35; rooted
cutting cost $1.00 per plant; royalty $0.10 per plant; establishment 1000sph; and average timber value $35 /m3
30 Year Rotation and MAI=12 m3/ha – require productivity
increase in MAI of 4.75 m3/ha (40%)
15 Year Rotation and MAI=12 m3/ha – require productivity
increase in MAI of 3.45 m3/ha (29%)
More realistic will be $1.50 to $2.00 if rooting not over 80% - on
30 year rotation – 66% to 87% improvement in productivity.
Compare to CSO seed no increase in production and estimated
volume gain of 40% - RSB is under strong additive control
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www.dpi.nsw.gov.au
CCV Clones
First Trials Established in 1997 2 Series of Trials Established >25 Hectares of tested clones
established in pilot plantations
Reliant on Tissue Culture Same Problem with costs as
hybrid clones
Currently used for Demonstation
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www.dpi.nsw.gov.au
Clonal Seed Orchards
Selections made in 1999-2001 Series of Progeny Trials Selections based on Productivity, RSB Tolerance and Form Significant Gains Predicted – CSO1 30% gain in volume
- ver Woodnum (Best Prov), CSO2 40% gain in volume.
Two Clonal Seed Orchards established to date in southern
NSW, third planned for establishment in Grafton
Bud production with in 18 months
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www.dpi.nsw.gov.au