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林业科学 ›› 1996, Vol. 32 ›› Issue (2): 111-117.

• 论文及研究报告 • 上一篇    下一篇

杨树无性系生长和材性的遗传变异及多性状选择*

王克胜1,卞学瑜1,佟永昌1,韩一凡1,任建中2   

  1. 1. 中国林业科学院林业研究所 北京 100091
    2. 山西省杨树丰产林实验局 大同 037006
  • 收稿日期:1994-09-01 出版日期:1996-03-25 发布日期:1996-03-25

GENETIC VARIATION IN GROWTH AND WOOD PROPERTIES AND MULTIPLE-TRAITS SELECTION OF POPLAR CLONES

Kesheng Wang1,Xueyu Bian1,Yongchang Tong1,Yifan Han1,Jianzhong Ren2   

  1. 1. The Research Institute of Forestry, CAF Beijing 100091
    2. The Experimental Bureau of Poplar, Shanxi Province Datong 037006
  • Received:1994-09-01 Online:1996-03-25 Published:1996-03-25

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、树髙、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萆强度的遗传控制。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髙的遗传正相关。直接选择效果优于间接选择, 指数选择优于直接选择。由4性状树髙、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。

关键词: 杨树, 无性系, 木材密度, 纤维, 遗传变异, 指数选择

Abstract:

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% respectivly. 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 selection 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 specific gravity and fiber length. 4 supper clones were selected by index selection method, which were good in both growth and wood properties.

Key words: Poplar, Clone, Wood specific gravity, Fiber, Genetic variance, Index selection