Modeling of wood properties from parameters obtained in nursery seedlings

Gonçalves, Raquel; Lorensani, Rafael Gustavo Mansini; Merlo, Edgard Monforte; Santaclara, Oscar; Touza, Manuel; Fernández, Manuel Guaita; Lario, Francisco José

doi:10.1139/cjfr-2017-0393

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…For example, in commonly planted temperate species like Pinus radiata (Burdon & Low, 1992), Eucalyptus globulus (Dutkowski & Potts, 1999;Apiolaza et al, 2005;Hamilton et al, 2007), Eucalyptus nitens (Purnell, 1988), and Pseudotsuga menziesii (Lausberg et al, 1995). In all these examples trees were assessed between 1 ⁄4 and 1 ⁄2 of rotation length, but it is our expectation that provenance differences will be expressed very early on, as there is evidence of wood properties differences at 1 year of age, both between genotypes of the same species (Apiolaza et al, 2011b) and between species (Goncalves et al, 2018).…”

Section: Trajectoriesmentioning

confidence: 99%

Selection history affects very early expression of wood properties in Pinus radiata

Apiolaza

Sharma

2023

Preprint

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Trees in breeding programmes are often selected at 1/4-1/3 of rotation, called "early selection", which is typically between 8 and 10 years in radiata pine. However, differences between populations and genotypes selected for either basic density or wood stiffness are already apparent at age 2. We report the application of very early screening techniques for wood properties in the New Zealand Radiata Pine Breeding Programme deployment populations. Approximately 3,000 trees representing three populations with 92 families and 10 clones were grown in a common garden trial, leaning for 21 months to separate compression and opposite wood. The trees were harvested and analysis carried outseparately by wood type. The trial showed the existence of large variability in wood properties at early age, in some cases similar to variability near rotation age, and moderate to high degree of genetic control (0.35 <= h2 <= 0.71). The genetic association between traits was strong, particularly between wood stiffness and longitudinal shrinkage (-0.69) and between longitudinal and volumetric shrinkage (0.83), suggesting that improving stiffness would also have a strong effect on improving dimensional stability. Basic density was also associated to stiffness and shrinkage, but with lower predictive capacity. These results can be used for roguing deployment populations—which already contain superior growing trees—and quickly upgrade the wood quality of seeds and clones currently available to New Zealand forest growers. We discuss necessary modifications to turn this research work into operations to screen any new material before commercial release.

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Section: Trajectoriesmentioning

confidence: 99%

Selection history affects very early expression of wood properties in Pinus radiata

Apiolaza

Sharma

2023

Preprint

View full text Add to dashboard Cite

show abstract

Selection history affects very early expression of wood properties in Pinus radiata

Apiolaza,

Sharma

2023

New Forests

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Trees in breeding programmes are often selected at 1/4–1/3 of rotation, called ‘early selection’, which is typically between 8 and 10 years in radiata pine. However, differences between populations and genotypes selected for either basic density or wood stiffness are already apparent at age 2. We report the application of very early screening techniques for wood properties in the New Zealand Radiata Pine Breeding Programme deployment populations. Approximately 3000 trees representing three populations with 92 families and 10 clones were grown in a common garden trial, leaning for 21 months to separate compression and opposite wood. The trees were harvested and analysis carried out separately by wood type. The trial showed the existence of large variability in wood properties at early age, in some cases similar to variability near rotation age, and moderate to high degree of genetic control ($$0.35 \le h^2 \le 0.71$$ 0.35 ≤ h 2 ≤ 0.71 ). The genetic association between traits was strong, particularly between wood stiffness and longitudinal shrinkage ($$-\,0.69$$ - 0.69 ) and between longitudinal and volumetric shrinkage (0.83), suggesting that improving stiffness would also have a strong effect on improving dimensional stability. Basic density was also associated with stiffness and shrinkage, but with lower predictive capacity. These results can be used for roguing deployment populations-which already contain superior growing trees-and quickly upgrade the wood quality of seeds and clones currently available to New Zealand forest growers. We discuss necessary modifications to turn this research work into operation to screen any new material before commercial release.

show abstract

Modeling of wood properties from parameters obtained in nursery seedlings

Cited by 2 publications

References 31 publications

Selection history affects very early expression of wood properties in Pinus radiata

Selection history affects very early expression of wood properties in Pinus radiata

Selection history affects very early expression of wood properties in Pinus radiata

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