【摘要】 以小陇山林科所收集的一年生164个灰楸无性系为材料，测定树高、地径、木材基本密度、胞壁率、双壁厚、胞腔直径和纤维长度等多个生长和材性性状指标，采用聚类和布雷金多性状综合评定法评价了灰楸种质材性优良程度。结果表明：材性性状在无性系间存在极显著差异，树高表型变异系数最大，达19.76%，纤维长度的最小，仅为6.28%；木材基本密度、胞壁率、纤维长和双壁厚的重复力都大于0.7，属于高重复力；相关分析表明，基本密度与胞壁率、双壁厚和纤维长均呈极显著正相关，与胞腔直径、弦向直径和平均中央直径呈显著或极显著负相关，材性性状间的表型相关系数绝对值均小于遗传相关系数绝对值，其相关主要受遗传控制。通过早期评价，灰楸无性系可初步分为四大类群：高木材密度型、短纤维型、低木材密度型和长纤维型。更多还原

【Abstract】 The 164 annual clones of Catalpa fargesii from the Xiaolongshan Forestry Institute were used as materials to determine the growth and wood properties.Through analyzing the tree height,ground diameter,wood basic density,cell wall rate,double wall thickness,cell cavity diameter and fiber length and other wood properties index,the excellent degree of wood properties of C.fargesii.was evaluated by method of clustering and Breggin multi-character comprehensive evaluation method.The results showed that there were extremely significant differences in wood properties among clones，The phenotypic variation coefficient of tree height was the largest (19.76%),while the fiber length was the smallest (6.28%)；The repeatability of wood basic density,cell wall ratio,fiber length and double wall thickness was greater than 0.7,which belongs to high repetitive force.The analysis showed that basic density was positively correlated with cell wall rate,double wall thickness,and fiber length,and significantly negatively correlated with cell diameter,chord diameter and mean central diameter.The absolute values of genetic correlation coefficient were greater than those of phenotypic correlation coefficient,and the correlation was mainly controlled by heredity.According to the early evaluation,the clones of C.fargesii.could be preliminarily divided into 4 types:high wood density type,short fiber dimension type,low wood density type and long fiber dimension type.更多还原