摘要
以７年生２５个杨树无性系为材料研究了生长和材质性状的遗传变异及性状之间的相关．６个性状纤维长、纤维宽、长宽比、木材密度、树高、胸径在无性系间均存在极显著的差异。生长和材质性状受中等更强度的遗传控制．６个性状的重复力分别为８１．９％，７３．３％，７０．５２％。６４．３％．６８．８％，７０．５４％．胸径和树高之间、纤维长度与纤维长宽比、胸径之间、木材密度与胸径之间都呈现出较高的遗传正相关．宜接选择效果优于间接选择，指数选择优于直接选择。由４性状树高、胸径、纤维长度与基本密度配合的选择指数对本实验群体比较合适。利用选择指数评选出４个生长和材质兼优的优良无性系。
The inheritances and correlations between growth characters and wood quality characters were studied with the data of 25 Popuar clones, which had been growing for 7 years.The significent differences among these clones were found in fiber length,fiber width,ratio of length to width,wood specific gravity,tree height and DBH.They were moderately or intensively inherited in 6 characters of growth and wood properties.The broad heritabilities were calculated by fiber length, fiber width,ratio of length to width and wood specific gravity, tree height and DBH, which were 81.9%,73.3%,70.52%,64.3%, 68.8%,70.54% respectiviy.High genetic positive correlations were found between tree height and DBH,between fiber length and ratio of length to wodth, between wood specific gravity and DBH.The effectiveness of different selecation methods in descent order were index selection>direct selection>indirect selection.The selection index were suitable in this experiment,which included tree height, DBH, wood specificgravity and fiber length.4supper.clones were selected by index selection method,which were good in both growth and wood properties.
出处
《林业科学》
CAS
CSCD
北大核心
1996年第2期111-117,共7页
Scientia Silvae Sinicae
基金
国家"八五"攻关专题
关键词
杨树
无性系
木材密度
纤维
遗传变异
指数选择
Poplar,Clone,Wood specific gravity,Fiber,Genetic variance.Index selection
