火炬松建筑材优良种源综合评定的研究  

Study on Provenance Selection of Loblolly Pine for Construction Timber

作　　者：刘昭息[1,2] 徐有明[1,2] 孙海菁[1,2] 姜景民 吕本树[1,2] 

机构地区：[1]中国林业科学研究院亚热带林业研究所 [2]华中农业大学

出　　处：《林业科学研究》1998年第4期417-423,共7页Forest Research

基　　金："八五"国家科技攻关专题

摘　　要：对富阳点１０年生火炬松种源试验林的研究结果表明，幼龄材阶段以建筑用材为目的的主要性状在种源间差异均为极显著；其中生长性状表型变异系数为１０％～３０％，木材物理力学和管胞形态特征的在５％左右，变幅的极差以材积最明显，可达１倍以上；各性状受中等或中上遗传力控制。性状间的简单表型相关，在生长与木材物理力学和管胞形态特征性状上表现出关系不密切、或者很微弱、方向各异的现象。用初级指数法评定出ＲＬ３１、ＲＬ２６、ＲＬ３０、ＲＬ２２、ＣＬ８共５个生长、材质兼优的建筑材种源，与林分均值相比，其平均遗传增益在材积、木材基本密度、顺纹抗压强度、抗弯强度上分别为５．９６％、５．４４％、３．１７％、４．８７％。The results of study on the 10 a loblolly pine provenance test in Fuyang City of Zhejiang Province showed that the distinct differences in main traits relating to the provenance evaluation of construction timber existed among provenances in juvenile wood stage,the phenotypic variation coefficients of growth traits were 10%～30%,of traits of wood physic mechanical properties and tracheid morphological features were about 5%,all of these traits were genetically controlled with above moderate broad sense heritabilities,the simple phenotypic correlations between growth traits and wood property traits were weak. The results of multitrait selection using preliminary index showed provenances of RL31,RL26,RL30,RL22,CL8 were good for construction timber,their average genetic gains of stem volume,wood density,crushing strength,modulus of elasticity were 5.96%,5.44%,3.17%,4.87% respectively compared with the average value of the test stand.

关 键 词：火炬松 建筑材 种源 综合评定 

分 类 号：S791.255[农业科学—林木遗传育种]