摘要
采用非破坏性测定木材材质的Pilodyn测定指标,研究毛白杨28个无性系间的材性遗传差异。室外测定毛白杨活立木胸径(DBH)和南向Pilodyn测定值(Ps),室内测定木芯木材基本密度(Ds)和木材外侧基本密度(Dso),对Pilodyn测定结果与木材密度作统计分析。研究结果表明:按照Ps、Dso及Ds分别将各个无性系的平均值进行排序,3个序列间存在极显著的相关关系(-0.749～0.651),毛白杨单株间Ps、Dso和Ds间存在极显著的相关关系(-0.506～0.706),毛白杨各个无性系Ps、Dso和Ds平均值间也存在极显著的相关关系(-0.840～0.808),使用Ps、Ds和Dso3个材质性状对毛白杨无性系进行方差分析,均得到各个无性系间存在极显著差异的结果。以这3个材性指标分别和胸径的平均值各自将28个无性系分为4类:A)高密度快生长;B)低密度快生长;C)高密度慢生长;D)低密度慢生长。经方差分析和多重比较结果证明,使用3个材性指标所分的4类各个类别间均差异显著。通过分类结果选择出11,12,346,191,337,24,384共7个生长快且木材密度高的毛白杨无性系。
This paper studied the genetic diversity of wood property among 28 clones of the living tree of Populus tomentosa with the indexes measured by Pilodyn that is a non-destructive method for testing wood property. We measured the diameter at breast height（ DBH）, and shot the probe of Pilodyn into the south side of the stem and collected parameters（ Ps ）of wood property in the field. And the basic density（ Ds） and the outer wood basic density（ Dso）On the south directions of the increment core of the wood were also measured in laboratory. With the parameters collected by using Pilodyn and data of the wood density of the increment core, the clones were ranked with Ps, Dso and D, mean values respectively. There were significant correlations among the three rankings （ - 0.749 - - 0.651）, among Ps, Dso and Ds of the individual trees （ - 0.506 - 0.706）and among Ps, Dso and Ds of the clones （ - 0. 840 -0. 808） respectively. The result of the ANOVA analysis also showed there was the remarkable difference in Ps, Dso and Ds among the clones. Based on the three indexes and the DBH respectively, we classified 28 clones into 4 clusters： A） high wood density with fast growth; B） low wood density with fast growth; C） high wood density with slow growth ; D） low wood density with slow growth. The outcome of ANOVA analysis and Multiple Comparisons proved that there were remarkable difference between the 4 clusters via the 3 indexes of wood property. Based on the phenotypic characters we selected 7 fast growth with high wood density clones which were 11, 12, 346, 191, 337, 24, 384.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2008年第7期23-28,共6页
Scientia Silvae Sinicae
基金
948项目"纸浆材性状测定与应用技术引进"(2005-4-56)
