tailieunhanh - Báo cáo lâm nghiệp: "Variation in wood properties among five full-sib families of Norway spruce (Picea abies)"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Variation in wood properties among five full-sib families of Norway spruce (Picea abies). | Ann. For. Sci. 64 2007 799-806 INRA EDP Sciences 2007 DOI forest 2007062 Available online at Original article Variation in wood properties among five full-sib families of Norway spruce Picea abies Arne STEFFENREMa Pekka SARANPAAb Sven-Olof LUNDQVlSTc Tore SKR0PPAa a The Norwegian Forest and Landscape Institute PO Box 115 1431 Ảs Norway b Finnish Forest Research Intstitute PO Box 18 01301 Vantaa Finland c STFI-Packforsk PO Box 5604 114 86 Stockholm Sweden Received 27 November 2006 accepted 11 May 2007 Abstract - Genetic- and environmental variation and correlation patterns were characterized for modulus of elasticity MOE modulus of rupture MOR and related wood traits latewood proportion wood density spiral grain microfibril angle and lignin content in five full-sib families of Norway spruce. The families were evaluated on the basis of clearwood specimens from the juvenile -mature wood transition zone of 93 sampled trees at age 30 year from seed. Family-means varied significantly p for all wood traits studied except lignin content. MOE varied between GPa among trees and GPa among families. MOR varied between 47-87 MPa among trees and 61-71 MPa among families. Families remained significantly different in an analysis of specific MOE MOE density and MOR MOR density . Hence solely relying on wood density as a wood quality trait in tree breeding would not fully yield the potential genetic gain for MOE and MOR. Correlations between wood structural traits and specific MOE and MOR are presented and discussed. genetic variation wood quality modulus of elasticity modulus of rupture tree improvement Résumé - Variabilité des propriétés du bois pour cinq familles de pleins-frères d épicéa commun Picea abies . La variabilité génétique et environnementale pour le module d élasticité MOE le module de rupture MOR et certaines autres propriétés de base du bois proportion de bois final densité du bois angle du fil angle des .