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Variation of radial wood properties from genetically improved Sitka spruce growing in the UK
- Source :
- Forestry, Forestry, Oxford University Press (OUP), 2016, 89 (2), pp.109-116. ⟨10.1093/forestry/cpv035⟩
- Publication Year :
- 2016
- Publisher :
- HAL CCSD, 2016.
-
Abstract
- International audience; There is little information about the impacts of past Sitka spruce (Picea sitchensis [Bong.] Carr.) tree breeding on wood properties because the emphasis has traditionally been on improving stem form and growth rates. This study used both SilviScan and mechanical testing to investigate the radial variations in wood stiffness, bending strength, density and microfibril angle in defect-free samples taken from the first United Kingdom progeny trial to reach merchantable size. We tested for differences in these radial patterns of variation in half-sibling progeny of three plus trees originally selected for superior growth rate and stem form against a non-selected control. Large differences in all of the properties were observed with radial position, with properties generally being less desirable in the corewood. Significant undesirable differences between the improved families and the control were found for stiffness, strength and microfibril angle. There was no significant relationship between wood density and stiffness in samples taken from the inner part of the tree, where stiffness was more closely associated with microfibril angle. Overall, previous selections for growth rate and/or stem form have compromised timber properties. It is recommended that current breeding programmes focus on corewood stiffness to prevent further degradation in the wood properties of the future timber supply.
- Subjects :
- 040101 forestry
0106 biological sciences
Radial position
technology, industry, and agriculture
Stiffness
Forestry
04 agricultural and veterinary sciences
15. Life on land
Three plus
Biology
01 natural sciences
Agronomy
Botany
medicine
0401 agriculture, forestry, and fisheries
Tree breeding
Growth rate
Microfibril
medicine.symptom
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
010606 plant biology & botany
Subjects
Details
- Language :
- English
- ISSN :
- 0015752X and 14643626
- Database :
- OpenAIRE
- Journal :
- Forestry, Forestry, Oxford University Press (OUP), 2016, 89 (2), pp.109-116. ⟨10.1093/forestry/cpv035⟩
- Accession number :
- edsair.doi.dedup.....a071e041def0063e7c152385f2d0ee93