杨树新杂种无性系生长与材性的联合选择  

Joint Selection for Growth and Wood Properties in Poplar Hybrid Clones

作　　者：于东阳[1] 梅芳[2] 王军辉[2] 朱景乐[3] 王金生[4] 

机构地区：[1]三峡大学,宜昌443002 [2]国家林业局林木培育重点实验室(中国林业科学研究院林业研究所) [3]中国林业科学研究院经济林研究开发中心 [4]青海省农林科学院

出　　处：《东北林业大学学报》2014年第2期10-13,16,共5页Journal of Northeast Forestry University

基　　金：国家林业局"948"项目资助(2005-4-56)

摘　　要：以青海省西宁市湟水林场9年生10个杨树新杂种无性系为材料，对生长和材性等9个性状进行了方差分析和遗传参数估算。研究结果表明，树高、胸径、材积、Pilodyn值、南向外侧基本密度、整株木材基本密度、纤维长度、纤维宽度、纤维长宽比在无性系间存在极显著或显著差异。无性系8-25的材积最高，为0．213 m3；8-24的最低，为8-25的14．5％。各性状的重复力在0．711～0．977，其中树高重复力最高，为0．977，纤维长度的最低，为0．711，胸径和材积的均高于0．900。 Pilodyn测定结果与木材密度的相关分析结果表明无性系Pilodyn平均值、南向外侧木材基本密度平均值和整株木材基本密度平均值间存在极显著的相关关系，相关系数为-0．846～0．981。胸径与树高、材积、南向外侧木材基本密度单株间存在极显著和显著的相关关系，相关系数分别为0．852、0．962和0．462。通过对10个无性系生长和材性之间的相关分析，发现杨树新杂种无性系胸径、材积、纤维长与南向外侧整株木材密度显著相关；参试无性系与对照北京杨和青杨比较，杂种无性系都超过青杨对照，有两个超过了北京杨，整株木材密度与对照相近，差异不显著。利用多性状主成分分析，选出8-6、8-16、8-25综合性状表现优良的无性系，其中8-25生长最好，胸径分别是对照青杨、北京杨的1．14、1．61倍，单株材积分别是对照青杨、北京杨的1．80、5．76倍。With ten nine-year clones of Poplar Hybrid Clones from Huangshui Forest Farm in Qinghai Province , the experiment was conducted to analyze the variance of growth and wood properties and estimate their genetic parameter .There are signif-icant differences among clones in height, diameter at breast height, volume, value of Pilodyn, wood outside basicdensity in the south, whole wood density, fiber length and fiber width.Volume of clone 8-25 was the highest （0.213 m3 ）, whereas that of clone 8-24 was the lowest accounting for 14.5%of clone 8-25.The repeatability of each characters is in 0.711-0.977, the repeatability of height was the highest （0.977）, that of fiber length is the lowest （0.711） and both of DBH and volume are higher than 0.900.By correlation analysis between Pilodyn value and wood density, there is very sig-nificant relationship between woodoutside basic density in the south and whole wood density in the south （-0.846-0.981）. DBH has significant relationship with volume, fiber length and whole wood outside basic density in the south, with the corre-lation coefficient of 0.852, 0.962 and 0.462, respectively.There are significant relationships among clones in DBH, vol-ume, fiber length and whole wood outside basic density in the south.All hybrid poplar clones are higher thanP opuul s cathayana, two hybrid poplar clones are higher than Populus×beijingensis, but its whole wood density approximates to that of controls, and there is no significant difference between the former and the control in whole wood density.By principal com-ponent analysis, three clones, 8-6, 8-16 and 8-25, have good performance in competitive characters, and 8-25 is the best.DBH of clone 8-25 is 1.14 and 1.80 times than those of controls （Populus×beijingensis and Populus cathayana）, and individual volume is 1.61 and 5.76 times than those of controls （Populus×beijingensis and Populus cathayana） .

关 键 词：杨树 杂种无性系 遗传分析 联合选择 

分 类 号：S722.3[农业科学—林木遗传育种] S781.31[农业科学—林学]