三倍体白杨杂种无性系木材的基本密度与化学成分变异  

Genetic Variations in Wood Basic Density and Chemical Components of Triploid Hybrid Clones of White Poplar

作　　者：张平冬[1] 吴峰[1] 康向阳[1] 

机构地区：[1]林木育种国家工程实验室(北京林业大学),北京100083

出　　处：《东北林业大学学报》2014年第4期26-31,共6页Journal of Northeast Forestry University

基　　金："十二五"国家农村领域科技支撑项目(2012BAD01B0302)

摘　　要：以河南省郑州市的5年生三倍体白杨杂种无性系测定林为研究对象,对三倍体白杨杂种无性系木材基本密度和化学成分遗传变异、生长性状与木材基本密度以及化学成分间的相关性进行了研究。结果表明,无性系对木材基本密度、苯醇抽出物质量分数、木质素质量分数及综纤维素质量分数的影响均达到了极显著水平。三倍体白杨杂种无性系的平均木材基本密度、平均苯醇抽出物质量分数及平均木质素质量分数分别为325.0 kg/m3、2.13%、19.14%,比对照毛白杨无性系1319分别低10.1%、14.8%、21.7%;平均综纤维素质量分数为83.85%,比对照毛白杨无性系1319高1.3%。木材基本密度和苯醇抽出物、木质素、综纤维素质量分数的重复力分别为0.90、0.71、0.96、0.86。生长性状与木质素质量分数间呈显著的负相关,胸径、材积与综纤维素质量分数呈显著正相关。生长性状与木材基本密度间呈微弱正相关,表明对三倍体白杨杂种无性系进行生长量选择时,木材密度不会显著改变。An experiment was conducted to determine the genetic variations m wood basra denmty, chemmai components and phenotypic correlations between growth traits and wood basic density and chemical components of five-year-old triploid hybrid clones of white poplar based on a clonal trial established in Zhengzhou of Henan Province. The elonal effects are highly significant for wood basic density, content of benzene-alcohol, content of lignin and content of holocellulose. The aver- age wood basic density is 325.0 kg/m3, 2.13% for the average content of benzene-alcohol, and 19.14% for the average content of lignin, which decreases by 10.1%, 14.8% and 21.7% than that of diploid clone 1319 of Populus tomentosa, respectively. The average content of holocellnlose is 83.85% , which is increased by 1.3% than that of diploid clone 1 319 of P. tomentosa. The estimated repeatability of clonal means is 0.90 for wood basic density, 0.71 for content of benzene- alcohol, 0.96 for content of lignin, and 0.86 for content of holocellulose. Significant negative correlations are between growth traits and content of lignin. However, the diameter at breast height and the stem volume significantly positively cor- relate with the content of holocellulose. Weak positive correlations are between growth traits and wood basic density. Therefore, selecting triploid clones with fast growth will not lead to the decrease in wood basic density.

关 键 词：三倍体白杨杂种 木材基本密度 化学成分 遗传变异 

分 类 号：S792.117[农业科学—林木遗传育种] S781.1[农业科学—林学]