NDLI: Patterns of longitudinal within-tree variation in pulpwood and solidwood traits differ among Eucalyptus globulus genotypes

Content Provider	Springer Nature Link
Author	Hamilton, Matthew G. Greaves, Bruce L. Potts, Brad M. Dutkowski, Gregory W.
Copyright Year	2007
Abstract	Wood discs were sampled from 6 heights up the stem of 248 trees representing 10 subraces and 116 families grown in an E. globulus base-population progeny trial. The lower stem had the least favourable wood properties for kraft pulpwood and most solidwood applications: bark was thickest, basic density was lowest and kino, decay and shrinkage traits were greatest at or below 12% of tree height. Significant genetic differences at the subrace level were revealed in diameter, bark thickness, basic density, decay and gross shrinkage and at the family within subrace level in diameter, basic density and decay. However, subrace-by-height-category interactions in bark thickness, basic density, decay and gross shrinkage indicated that differences among subraces were dependent on height in these traits. Examination of longitudinal trends revealed some evidence that the zone of thick basal bark extended further up the stem in thicker-barked subraces and that the Southern Tasmania subrace might be less effective than other subraces in restricting the longitudinal spread of decay after infection.Des disques de bois ont été prélevés à 6 hauteurs différentes dans 248 arbres représentant 10 provenances et 116 familles d’un dispositif de provenance-descendance d’E. globulus. La partie inférieure des troncs présente les propriétés du bois les moins bonnes pour la pâte Kraft et la plupart des utilisations du bois massif : l’écorce est plus épaisse, l’infradensité plus faible tandis que le lino, la dégradation biologique et les retraits sont plus importants jusqu’ à 12 % de la hauteur des tiges. Des différences génétiques significatives ont été établies au niveau provenance pour le diamètre, l’épaisseur d’écorce, l’infradensité et la dégradation biologique et au niveau famille dans une provenance pour l’infradensité et la dégradation biologique. Cependant, pour ces propriétés, les interactions provenance par catégorie de hauteur, pour l’épaisseur d’écorce, l’infradensité, la dégradation biologique et le retrait total, indiquent que les différences entre provenances dépendent de la hauteur. L’analyse des variations longitudinales fait apparaître que la longueur de la bille de pied ayant une écorce plus épaisse est plus importante pour les provenances présentant des écorces épaisses et que les provenances de sud de la Tasmanie pourraient être moins efficaces que les autres pour limiter la diffusion des pourritures après infection.
Starting Page	831
Ending Page	837
Page Count	7
File Format	PDF
ISSN	12864560
Journal	Annals of Forest Science
Volume Number	64
Issue Number	8
e-ISSN	1297966X
Language	French
Publisher	Springer Netherlands
Publisher Date	2007-01-01
Publisher Institution	Institut National de la Recherche Agronomique (INRA)
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Forestry Wood Science & Technology Forestry Management Tree Biology Environment
Content Type	Text
Resource Type	Article
Subject	Ecology Forestry

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