摘要
以群众杨无性系为材料，研究了Ｆ１代木材材性性状的杂种优势，用主成分遗传距离类平均法进行了无性系聚类分析，在此基础上结合抗性进行优良无性系选择。结果表明：（１）杨树木材性状Ｆ１代普遍存在杂种优势。（２）１８个无性系可聚为明显不同的５类，第一类速生、纤维性状中等；第二类生长中等，密度较小，纤维较好；第三类纤维性状优良且生长良好；第四类亲本Ｐ１５Ａ生长快，纤维较好；第五类木材密度大，生长中等，纤维较好。（３）根据聚类结果，结合抗性和生长表现选出４个优良无性系。
Heterosis of wood quality characteristics among 18 Populus × xiaozhuania cv.
‘popularis’improved clones has been studied and group-average method of clustering was
used to cluster the P. × xiaozhuania cv。 ‘popularis’ improved clones according to
ge-netic distance. 1.Significant heterosis was observed for wood quality characteristics among
P. × xi- aozhuania cv.‘popularis’ improved clones in fiber length,fiber width, ratio of
length to width,double)wall thickness and wood specific gravity. 2. 18 clones were clustered
into 5 groups. The first group included clones growing fast with medium fiber quality. The
second group included clones with medium growth,small wood specific gravity and better fiber
quality. The third group included clones growing fast with good fiber quality. The fourth group
had only one clone P15A,which grew fast and had better fiber quality. The fifth group included
one clone which had the biggest wood specific gravity, medium growth and better fiber
quality. 3. 4 supper clones were selected according to multiple comparisons heterosis
analysis,cluster analysis and resistance.
出处
《林业科学研究》
CSCD
北大核心
1995年第2期119-126,共8页
Forest Research
基金
国家"八五"攻关专题
关键词
杨树
群众杨
杂种优势
遗传距离
杂种一代
Populus × xiaozhuania cv.
‘popularis’,genetic improvement,hetero-sis,wood specific gravity,genetic distance,cluster
analysis
