Quantifying phenotypic variation in wood colour in Acacia melanoxylon R.Br.

Bradbury, Gordon J.; Potts, Brad M.; Beadle, C. L.

doi:10.1093/forestry/cpp040

Cited by 13 publications

(14 citation statements)

References 16 publications

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“…For colour measurement, the dried cores were mounted into routed grooves in boards of Pinus radiata using polyvinyl acetate glue and put through a commercial drum sander to remove half of each core and expose a dressed radial surface. Colour was measured using a Minolta CR400 Chroma Meter and the CIELAB colour space (Wyszecki and Stiles 1982) using the C illuminant and the 2°standard observer (Bradbury et al 2010b).…”

Section: Sampling and Measurementmentioning

confidence: 99%

“…For each core, both the mean and maximum ΔE76 were used as measures of heartwood colour variation. For each core, the difference between the mean heartwood and mean sapwood colours was also calculated (Bradbury et al 2010b). …”

Section: Sampling and Measurementmentioning

confidence: 99%

“…Blackwood timber is of medium density, with excellent drying, working and finishing properties. It has pale cream sapwood with a generally dark heartwood colour range (Bradbury et al 2010b). It occasionally exhibits strong figure in the grain such as fiddleback or wavy grain.…”

Section: Introductionmentioning

confidence: 99%

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Genetic and environmental variation in wood properties of Acacia melanoxylon

Bradbury

Potts

Beadle

2011

Annals of Forest Science

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Section: Sampling and Measurementmentioning

confidence: 99%

Section: Sampling and Measurementmentioning

confidence: 99%

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Genetic and environmental variation in wood properties of Acacia melanoxylon

Bradbury

Potts

Beadle

2011

Annals of Forest Science

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“…As whitewood has historically been sourced from the wild (FAO et al 2001, Page 2009, it is likely that historic whitewood stocks were of a greater age and DBH, and therefore consisted almost entirely of heartwood (Lachenbruch et al 2011) from which whitewood earned its reputation as a fine-grained species. Breeding for higher density may improve wood colour and grain (Vanclay et al 2008, Bradbury et al 2010, which may be a further breeding objective trait for future assessment.…”

Section: Variation In Wood Densitymentioning

confidence: 99%

Basic density, diameter and radial variation of Vanuatu Whitewood (Endospermum medullosum): potential for breeding in a low density, tropical hardwood

Settle¹,

Page²,

Bush³

et al. 2012

int. forest. rev.

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Vanuatu whitewood (Endospermum medullosum L.S. Smith) is an economically important timber species for Vanuatu. Inter-and intraprovenance genetic parameters for stem diameter at breast height, basic density and radial variation in density, were estimated for two provenances selected from a 12.4-year-old open-pollinated seed orchard on Espiritu Santo Island, Vanuatu. Kole provenance exhibited the highest mean basic density, greatest mean diameter and greatest radial variation in density across the stem.Mean basic density at breast height was 345±2 kg/m 3 . Growth rings were not visually discernable and colour was homogenous across all samples. For radial variation determination, each pith-bark core was sectioned into four equi-length subcores (A-D). Subcore density increased consistently and significantly from pith to bark, with mean basic density of 308±3, 327±3, 343±3 and 359±3 kg/m 3 for cores A-D respectivel y.The narrow-sense heritability estimate (ĥ 2 ) was low (0.26±0.2) for diameter, with a moderate coefficient of additive genetic variation (CV A = 17.61%). Estimated ĥ 2 for density was moderate (0.49±0.24), with a low coefficient of additive genetic variation (CV A = 5.39%). Though the precision of these estimates is modest, reflective of the small sample size, indications are that the heritable genetic variation in both growth and quality traits will result in economic gain from a recurrent selection and breeding program. La densité de base, le diamètre et la variation radiale de Vanuatu blancs (medullosum Endospermum). Trait-trait corrélations dans une faible densité, des feuillus tropicaux D.J. SETTLE, T. PAGE, D. BUSH, J. DORAN, M. SETHY et I. VIJIVanuatu whitewood est une espèce de bois économiquement importants pour le Vanuatu. Les paramètres génétiques pour le diamètre de la tige (DBH), la densité de base (DEN) et de la variation radiale (RadVar) ont été estimés en deux provenances pendant 12,4 années sur l'élevage de la population Endospermum medullosum L.S. Smith à pollinisation libre sur île d'Espiritu Santo, au Vanuatu. La provenance Kole a été exposée au plus haut de la densité moyenne de base, au plus haut diamètre moyen et à la plus grande variation de la densité dans la tige.Les estimations d'héritabilité (ĥ 2 ) (0,26±0,2) ont été faibles pour le DBH, avec une variation phénotypique modérée (CV A = 17,61%) et une estimation de l'héritabilité (0,49±0,24) ce qui étaient modérées pour la densité, avec une variation phénotypique faible (CV A = 5,39%). La densité moyenne de base à hauteur de poitrine était de 345 (SE±2) kg/m 3 , et a augmenté de façon constante 308 (SE±3), 327 (SE±3), 343 (SE±3) et 359 (SE±3) kg/m 3 et significative de la moelle à l'écorce.La faible taille de l'échantillon disponible peut avoir réduit la précision, toutefois il est prévu que le gain économique dû à la croissance et aux caractères de qualité peuvent être obtenue à partir d'une sélection récurrente et programme d'élevage étant donné les variations génétiques héréditaires indiqué dans cette étude.

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“…This method of measuring color differences is used in many scientific publications about wood color (e.g., Aguilar-Tovar et al 2009;Bradbury et al 2010;Oltean et al 2008). In the year 2001, the CIE published a new method to calculate color difference which has not yet been documented in a standard.…”

Section: Introductionmentioning

confidence: 99%

The potential of color measurements with the CIEDE2000 equation in wood science

et al. 2011

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This study seeks to assess the potential use of the CIEDE2000 color difference equation in wood science. Therefore, a set of oak wood samples were prepared and assessed by experts. The visual perception of the observers was correlated with the two different color difference equations CIELAB from DIN 6174 and the CIEDE2000 equation. For a practical example two different types of wood were bleached and exposed to UV-light. The results showed that the CIEDE2000 equation outperformed the CIELAB equation. The CIELAB equation showed generally an overestimation of the color change ( E) for wood applications, compared to the nontrivial CIEDE2000 equation from 2001. DieVerwendung der CIEDE2000 Formel für Farbmessungen in der Holzforschung Zusammenfassung Diese Studie versucht die mögliche Verwendung der Farbunterschiedsformel CIEDE2000 in der Holzforschung zu beurteilen. Daher wurde eine Reihe von Eichenholzproben hergestellt und visuell begutachtet. Die visuelle Wahrnehmung wurde mit den Farbwertergebnissen der beiden Farbunterschiedsgleichungen CIELAB aus M. Hauptmann ( ) · H. Pleschberger · C. Hansmann Wood K plus-DIN 6174 und der CIEDE2000 Gleichung korreliert. Für ein praktisches Beispiel wurden zwei verschiedene Arten von Holz gebleicht und mit UV-Licht bestrahlt. Die erhaltenen Ergebnisse zeigen, dass die Gleichung CIEDE2000 die CIELAB Gleichung in ihrer Vorhersage des tatsächlichen Farbunterschieds übertrifft. Die CIELAB-Gleichung zeigte im Allgemeinen eine Überschätzung des Farbunterschieds ( E) auf Holz, im Vergleich zur CIEDE2000 Gleichung aus dem Jahr 2001.

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Quantifying phenotypic variation in wood colour in Acacia melanoxylon R.Br.

Cited by 13 publications

References 16 publications

Genetic and environmental variation in wood properties of Acacia melanoxylon

Genetic and environmental variation in wood properties of Acacia melanoxylon

Basic density, diameter and radial variation of Vanuatu Whitewood (Endospermum medullosum): potential for breeding in a low density, tropical hardwood

The potential of color measurements with the CIEDE2000 equation in wood science

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