Genetics of <i>Eucalyptus</i> wood properties

Raymond, Carolyn A

doi:10.1051/forest:2002037

Cited by 121 publications

(112 citation statements)

References 14 publications

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“…Barnes et al (1992) reported that heritability estimates are often inflated by selective thinning if there are dominance effects present. Wood quality traits are usually under strong additive genetic control (Cornelius, 1994;Raymond, 2002) while dominance effects can be significant in the genetic control of growth traits in eucalypts (Bouvet et al, 2009). Therefore, selective thinning for growth should have had little effect on heritability of wood density and cellulose content.…”

Section: Effect Of Thinning and Sampling Methods On Heritabilities Andmentioning

confidence: 99%

Cellulose content as a selection trait in breeding for kraft pulp yield in Eucalyptus urophylla

et al. 2009

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Abstract• The aim of this study was to investigate the effectiveness of using cellulose content, measured by the diglyme-HCl method, as a selection trait in breeding programs for kraft pulp yield in Eucalyptus urophylla.• A total of 275 trees from sixty-two families were sampled from a thinned progeny trial of E. urophylla in northern Vietnam to evaluate cellulose content from breast-height increment cores. Among those, twenty unrelated trees were felled to evaluate cellulose content and pulp yield from breastheight disk samples.• The regression of pulp yield of disk samples on cellulose content was strong either from disks (R 2 = 0.83) or increment cores (R 2 = 0.69). There was no significant difference in cellulose content between the provenances. The narrow-sense within-provenance heritability of cellulose content was 0.50 and the coefficient of additive genetic variation was 3.9%. Genetic correlations between cellulose content and growth (0.28-0.45) or wood basic density (-0.02) were not significantly different from zero.• Breast-height increment core cellulose content measured by diglyme-HCl method is under strong genetic control and can be used to rank trees for pulp yield in E. urophylla plantations. Selection for increased cellulose content would have only minor effects on growth and wood basic density. Mots-clés :teneur en cellulose / Eucalyptus urophylla / corrélation génétique / héritabilité / rendement en pâte Résumé -La teneur en cellulose comme un trait de sélection pour l'amélioration du rendement en pâte kraft d'Eucalyptus urophylla.• L'objectif de cette étude était d'étudier l'efficacité de l'utilisation de la teneur en cellulose, mesuré par la méthode diglyme-HCl, comme un trait de sélection dans les programmes d'amélioration du rendement en pâte kraft chez Eucalyptus urophylla.• Un total de 275 arbres issus de soixante-deux familles ont été échantillonnés, à partir d'un essai de descendance d' E. urophylla dans le nord du Vietnam, pour évaluer la teneur en cellulose de carottes d'accroissement prélevées à hauteur de poitrine. Parmi ces arbres, vingt ont été abattus afin d'évaluer la teneur cellulose et le rendement en pâte de disques échantillons, prélevées à hauteur de poitrine.• La régression de la production de pâte du disques échantillons a été forte sur la teneur en cellulose, soit à partir des disques (R 2 = 0.83) ou des carottes d'accroissement (R 2 = 0.69). Il n'y a pas de différence significative pour la teneur en cellulose entre les provenances. Le sens restreint dans l'héritabilité intra-provenance de la teneur de la cellulose était 0,50 et le coefficient de variation géné-tique additive a été de 3,9 %. Les corrélations génétiques entre la teneur en cellulose et la croissance (0,45) ou l'infra densité du bois (-0,02) ne sont pas significativement différentes de zéro.• La teneur en cellulose des carottes d'accroissement mesurée par la méthode diglyme-HCl est sous contrôle génétique fort et peut être utilisée pour classer les arbres pour le rendement en pâte dans les plantations d'E. ...

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Section: Effect Of Thinning and Sampling Methods On Heritabilities Andmentioning

confidence: 99%

Cellulose content as a selection trait in breeding for kraft pulp yield in Eucalyptus urophylla

et al. 2009

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“…Density and other wood properties of tropical hardwoods typically have higher heritability than growth traits (e.g., Arnold et al, 2004;Raymond, 2002;Sotelo Montes et al, 2006;2007a;2007b;Wei and Borralho, 1997). Results from this test are consistent with this general trend.…”

Section: Variation Clines and Correlations In Wood Densitymentioning

confidence: 99%

Genetic variation in wood density and correlations with tree growth in Prosopis africana from Burkina Faso and Niger

Montes¹,

Weber²

2009

Ann. For. Sci.

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Abstract• Variation in wood basic density and its correlation with tree growth were investigated at 13 years in a provenance/progeny test of Prosopis africana in Niger. The test included progeny from 256 trees sampled from 24 provenances in the Sahelian ecozone of Burkina Faso and Niger.• Variation in wood density was significant due to provenances and families within provenances. Individual tree heritability was higher for wood density than for growth traits. Provenance means for wood density increased from the more humid to the drier parts of the sample region. Phenotypic correlations indicated that larger trees tended to have denser wood.• Clines suggest that natural populations of P. africana from the drier parts of the sample region have the genetic capacity to produce denser wood, compared with populations from the more humid parts of the region. Correlations and heritability estimates suggest that selection of faster-growing trees may produce a small gain in wood volume but little (if any) gain in density in the subsequent generation. Multi-location provenance/tests are needed to confirm this tentative conclusion. Mots-clés :Sahel / adaptation / conservation / amélioration des arbres Résumé -Variation génétique de la densité du bois et corrélations avec la croissance de l'arbre chez Prosopis africana provenant du Burkina Faso et du Niger.• La variation de la densité du bois et sa corrélation avec la croissance de l'arbre ont été étudiées à l'âge de 13 ans dans un essai de provenances/descendances de Prosopis africana au Niger. L'essai a inclus les descendances de 256 arbres mères provenant de 24 provenances de l'écozone sahélienne du Burkina Faso et du Niger.• La variation de la densité du bois a été significative en relation avec les provenances et les familles à l'intérieur des provenances. L'héritabilité a été plus élevée pour la densité que pour les caractères de croissance de l'arbre. La densité moyenne des provenances a augmenté des sites les plus humides aux sites les plus secs de la région échantillonnée. Les corrélations phénotypiques ont montré que les plus grands arbres ont eu tendance à avoir le bois le plus dense.• Les clines suggèrent que les populations naturelles de P. africana des sites les plus secs de la région échantillonnée ont la capacité génétique de produire du bois plus dense que les populations des sites les plus humides de la région. Les corrélations et les héritabilités estimées suggèrent que la sélection d'arbres à croissance rapide peut produire un faible gain en volume de bois et très peu de gain en densité du bois dans la génération suivante. Des essais de provenance/descendance dans plusieurs sites sont nécessaires pour confirmer cette conclusion provisoire.

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“…This calibration is then used to predict the lignin or extractive content of further samples based on their NIR spectrum. It is implicit in this technique that the "training" sets on which the calibrations are based contain the whole range of variation in the samples to be further analysed (Raymond 2002;Tsuchikawa 2007;Mora and Schimleck 2008). The main advantage of NIR spectroscopy technique is that, after calibration, more than one parameter per sample can be determined at once.…”

Section: Introductionmentioning

confidence: 99%

Estimation of physical and mechanical properties of agro-based particleboards by near infrared spectroscopy

et al. 2010

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Partial least square regression (PLS-R) calibrations based on near infrared (NIR) spectroscopic data were developed in order to predict mechanical and physical properties of agro-based particleboards. The panels were manufactured using Eucalyptus and Pinus wood particles and sugar cane bagasse. The following panel properties were evaluated according to standard methods: modulus of elasticity (MOE), modulus of rupture (MOR), internal bonding (IB) strength, water absorption (WA24H), and thickness swelling (TS24H) after 24 hours of immersion. NIR spectra information was measured on samples cut from each particleboard and correlated with their physical and mechanical properties by PLS-R to build predictive NIR models. The NIR models for IB, WA24H and TS24H presented satisfactory coefficient of determination (0.73; 0.72 and 0.75, respectively.) The key role of resins (adhesives), cellulose, and lignin for NIRS calibrations of mechanical and physical properties of the particleboards is shown. These models can be useful to quickly verify such properties in unknown agro-based particleboards.

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Genetics of Eucalyptus wood properties

Cited by 121 publications

References 14 publications

Cellulose content as a selection trait in breeding for kraft pulp yield in Eucalyptus urophylla

Cellulose content as a selection trait in breeding for kraft pulp yield in Eucalyptus urophylla

Genetic variation in wood density and correlations with tree growth in Prosopis africana from Burkina Faso and Niger

Estimation of physical and mechanical properties of agro-based particleboards by near infrared spectroscopy

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