对55个杉木无性系管胞微纤丝角的遗传变异进行了研究。
Genetic variations on tracheid microfibril Angle of 55 Chinese fir clones were investigated.
结果表明，管胞直径和微纤丝角及生长轮宽度等指标表现为差异显著。
The results showed that there were distinct differences in micro-fibril Angle, width of growth-ring and tracheid diameter.
结果表明，微纤丝角径向自内向外略有减小，纤维股面积比径向自内向外逐渐增大；
The result shows that:(1)Micro-fibril angle increases gradually from the center to the edge in radial direction, and the surface area percentage of its fiber band has the same variability;
广义遗传力变化为0.734~0.867，微纤丝角无性系间的差异受很强的遗传控制；
The broad sense heritability estimates of clones varied between 0.734 and (0.867), indicating the microfibril angle was under strong genetic control.
方差分析表明：63杨、69杨微纤丝角、基本密度、抗弯强度和干缩率差异显著，说明63杨和69杨受滩地类型影响较大。
It indicates that there are significant differences for microfibril Angle, basic density, bending strength and rate of shrinkage of poplar 63 and poplar 69 by variance analysis.
测量结果表明：在花后5～50天内，细胞壁S_2，层的平均微纤丝螺旋角随花后生长天数的增加而逐渐变小。
As an application result are given for Gossypium hirsutum L. Daizi-15. The result was: Between 5 and 50 days postanthesis mean microfibrillar spiral angle of S_2 secondary walls declined.
测量结果表明：在花后5～50天内，细胞壁S_2，层的平均微纤丝螺旋角随花后生长天数的增加而逐渐变小。
As an application result are given for Gossypium hirsutum L. Daizi-15. The result was: Between 5 and 50 days postanthesis mean microfibrillar spiral angle of S_2 secondary walls declined.
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