无损检测在日本落叶松材性育种中的应用前景探讨  

Application Prospect on Applying Nondestructive Testing Technology in Wood Property Breeding of Larix kaempferi

作　　者：易敏[1] 赖猛[1] 孙晓梅[1] 张守攻[1] 赵鲲 

机构地区：[1]中国林业科学研究院林业研究所林木遗传育种国家重点实验室,北京100091 [2]河南洛阳林业科学研究所,洛阳471002

出　　处：《林业科学》2014年第11期96-103,共8页Scientia Silvae Sinicae

基　　金：国家"十二五"科技支撑项目"北方针叶树种高世代育种技术研究与示范"(2012BAD01B01)

摘　　要：使用Pilodyn和微秒计对20个日本落叶松无性系进行无损检测，研究无性系间无损检测指标的表型和遗传变异，结果表明：应力波速（ SWV）的表型变异系数和遗传变异系数分别为5.09%和3.57%，低于 Pilodyn南向测定值（Ps）和北向测定值（Pn）；3个无损检测指标无性系重复力的分布范围为0.34～0.48，说明它们受中等强度的遗传控制。研究无损检测指标与各材质性状间的关系，结果表明： Ps和 Pn与生长轮密度、早材密度、生长轮壁腔比和早材壁腔比呈极显著负相关；SWV与生长轮微纤丝角、早材微纤丝角和晚材微纤丝角呈极显著负相关，但与生长轮弹性模量、早材弹性模量和晚材弹性模量呈极显著正相关。多元回归分析表明，对 Ps，Pn和SWV贡献率排名前2位的材质性状分别为生长轮密度和早材壁腔比、生长轮密度和生长轮壁腔比以及早材微纤丝角和生长轮弹性模量。建立无损检测指标与相对应材质性状的线性回归方程，发现 Ps与生长轮密度间方程的决定系数（0.340）略小于 Pn与生长轮密度的决定系数（0.360）； SWV 与早材微纤丝角、生长轮弹性模量间方程的决定系数分别为0.348和0.316。The phenotypic and genetic variation of nondestructive testing traits among 20 clones of the living trees of Larix kaempferi by using Pilodyn and microsecond timer were studied. Variant analysis revealed that the phenotypic and genetic variation coefficients for SWV（ stress wave velocity） were 5. 09% and 3. 57%,which higher than those of Ps and Pn. The clonal repeatability for the nondestructive testing traits ranged from 0. 34 to 0. 48 in this study,which meant that variation in nondestructive testing traits of L. kaempferi were controlled genetically at medium level. The correlations between nondestructive testing traits and wood properties were analysed,and the results showed that there were significant negative correlations between Ps,Pn and ring density,early wood density,ring wall thickness to lumen area and early wood wall thickness to lumen area. The SWV had significant negative correlations with ring microfibrillar angle,early wood microfibrillar angle and late wood microfibrillar angle,but had significant positive correlations with ring modulus of elasticity,early wood modulus of elasticity and late wood modulus of elasticity. The results of the multiple regression analysis showed that the top two contribution rates of wood property to the Ps,Pn and SWV were ring density and early wood wall thickness to lumen area,ring density and ring wall thickness to lumen area,and early wood microfibrillar angle and ring modulus of elasticity. Linear regression equations between nondestructive testing traits and corresponding wood properties were constituted,and the results showed that the coefficient of determination of linear regression equation between Ps and ring density （0. 340） was slightly smaller than those of Pn（0. 360）. The coefficients of determination of linear regression equations between SWV and early wood microfibrillar angle,ring modulus of elasticity were 0. 348 and 0. 316 .

关 键 词：日本落叶松 无损检测 材质性状 相关关系 线性回归 

分 类 号：S781[农业科学—木材科学与技术] S722.3[农业科学—林学]