Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Patterns of longitudinal within-tree variation in pulpwood and solidwood traits differ among Eucalyptus globulus genotypes. | Ann. For. Sci. 64 2007 831-837 INRA EDP Sciences 2007 DOI forest 2007064 Available online at Original article Patterns of longitudinal within-tree variation in pulpwood and solidwood traits differ among Eucalyptus globulus genotypes Matthew G. Hamilton1 Bruce L. Greaves Brad M. POTTSa Gregory W. DUTKOWSKIb a School of Plant Science and Cooperative Research Centre for Forestry University of Tasmania Private Bag 55 Hobart TAS 7001 Australia b PlantPlan Genetics Pty Ltd Private Bag 55 Hobart TAS 7001 Australia Received 18 October 2006 accepted 10 July 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. wood properties Eucalyptus globulus longitudinal variation within-tree variation genetic variation Résumé - Les variations longitudinales intra-arbre des propriétés papetières et du bois varient entre les genotypes d Eucalyptus globulus. Des disques de bois ont été prélevés à 6 hauteurs différentes dans 248 .
