马尾松优树无性系生长、干形和木材密度评价  

Evaluation on Growth, Stem Form and Wood Density of Plus Clones of Pinus massoniana

作　　者：储德裕[1] 刘青华[2] 金国庆[2] 秦国峰[2] 周志春[2] 

机构地区：[1]浙江省淳安县姥山林场,浙江淳安311700 [2]中国林业科学研究院亚热带林业研究所,浙江富阳311400

出　　处：《浙江林业科技》2010年第5期46-52,共7页Journal of Zhejiang Forestry Science and Technology

基　　金：十一五"国家科技支撑专题(2006BAD01A1403);国家林业局林木种质种苗质量监管与保护项目"马尾松种质资源收集保存

摘　　要：利用浙江淳安国家马尾松(Pinus massoninna)种质库中22年生来自9个产地(或省区)180个优树无性系的保存林材料,研究马尾松优树无性系生长和材性在产地间和产地内的遗传变异规律,并对保存的优树无性系进行综合评价。结果表明,马尾松优树无性系生长、形质和木材基本密度皆存在显著的产地间和产地内变异,其中产地内无性系间的变异为产地间变异的1.87～2.38倍;与生长性状比较,木材基本密度在产地间所占的变异分量相对较大;除湖南产地优树无性系年轮宽度从髓心向树皮呈单峰变化外,其它8个产地优树无性系的年轮宽度皆随形成层年龄的增加而逐渐变窄;马尾松优树无性系的木材基本密度从髓心至树皮逐渐增大,到达一定年龄后渐趋稳定,但四川和广东两产地优树无性系木材密度的径向均匀性较低。早晚相关分析结果显示,除江西、广东和四川产地优树无性系木材基本密度的早期选择年龄晚于径向生长外,马尾松不同产地优树无性系的木材密度和径向生长皆可在5年生时开始早期选择。通过聚类可将180个优树无性系归为3大类和4个亚类,并综合评选出20个速生优质的优树无性系,其主要集中在第1类和第2类第2亚类。180 clones from nine producing areas were selected in a 22-year genebank of Pinus massoniana for studying growth and wood properties of plus clones, as well as genetic variation within and among producing areas. And evaluation was made on the utilization value of the preserved resources. The results indicated that growth, stem form and wood density of plus clones had significant differences within and among producing area, and the variation among clones within the same producing area was 1.87-2.38 time higher than that among producing areas. Variance component of wood density among producing areas was larger compared with growth. Ring width of all plus clones decreased from the pith to bark except of Hunan. Wood density of plus clones increased from pith to bark, and was stable at certain age, but that of Sichuan and Guangdong had lower evenness. Juvenile-mature correlation analysis demonstrated that that radial growth and wood density of plus clones could be selected at 5-year except that of Jiangxi, Guangdong and Sichuan. The 180 clones could be divided into three categories and four subclasses by cluster analysis. 20 fast-growing and high quality clones were selected, most of them were in the second category and the second subclass.

关 键 词：马尾松 优树无性系 生长 材性 遗传变异 评价 

分 类 号：S781.3[农业科学—木材科学与技术]