HEIN, Paulo Ricardo Gherardi; BOUVET, Jean-Marc; MANDROU, Eric; VIGNERON, Philippe; CLAIR, Bruno; CHAIX, Gilles

doi:10.1007/s13595-012-0186-3

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HEIN, Paulo Ricardo Gherardi
Universidade Federal de Lavras = Federal University of Lavras [UFLA]
Centre de Coopération Internationale en Recherche Agronomique pour le Développement [Cirad]
Mécanique de l'Arbre et du Bois [MAB]

BOUVET, Jean-Marc
Amélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]

MANDROU, Eric
Biodiversité, Gènes & Communautés [BioGeCo]
Amélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
CEVA Santé Animale [Libourne, France] [Laboratoire Vétérinaire Pharmaceutique]

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Ce document a été publié dans

Annals of Forest Science. 2012, vol. 69, n° 6, p. 681 - 691

Springer Nature (since 2011)/EDP Science (until 2010)

Résumé en anglais

The genetic and environmental control of microfibril angle (MFA) and its genetic correlations with other wood and growth traits are still not well established in Eucalyptus sp. To determine the narrow-sense heritability estimates (h (2)) of MFA, wood density (D), Klason lignin (KL) content, syringyl to guaiacyl (S/G) ratio and growth traits, their variation from pith to cambium and their genetic correlations. Heritability and correlations were assessed in 340 control-pollinated progenies of 14-year-Eucalyptus urophylla S.T. Blake using near infrared spectroscopic models. Moderate to high heritability were found for MFA (h (2) = 0.43), D (h (2) = 0.61), S/G (h (2) = 0.71) and LK (h (2) = 0.76). The genetic control of D and MFA and the genetic and residual correlation between chemical and growth traits varied with age. The genetic correlation C x D was always strongly negative (r < -0.80) while the correlation D x MFA remained constant and positive in the juvenile wood (r = 0.7), before disappearing in the mature wood. These results could be explained by gene pleiotropic effect, low microfibril angle compensating for low wood density and fast growth or by linkage disequilibrium induced by sampling. Variations in MFA and KL in the mature wood were also genetically controlled. These findings provide the opportunity for developing breeding strategies for pulpwood, fuelwood and sawntimber production in Eucalyptus sp.< Réduire

Mots clés

MFA

NIR spectroscopy

TRAITS

NITENS

GLOBULUS

VARIANCE

MODEL

Mots clés en anglais

Variance components

Klason lignin

Syringyl to guaiacyl ratio

Factorial mating design

Wood phenotyping

WITHIN-TREE VARIATION

BASIC DENSITY

PARAMETERS

SELECTION

TASMANIA