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林业科学 ›› 1996, Vol. 32 ›› Issue (5): 426-433.

• 论文及研究报告 • 上一篇    下一篇

材性改良研究V.美洲黑杨×小叶杨新无性系年轮密度组成性状遗传参数估算

潘惠新,黄敏仁,阮锡根,李火根,王明庥   

  1. 南京林业大学林木遗传和基因工程开放研究实验室 南京 210037
  • 收稿日期:1995-08-28 出版日期:1996-09-25 发布日期:1996-09-25

RESEARCH ON WOOD PROPERTIES IMPROVEMENT V. GENETIC PARAMETER ESTIMATES FOR RING DENSITY COMPONENT TRAITS OF NEW CLONES IN POPULUS DELTOIDES×P.SIMONII

Huixin Pan,Minren Huang,Xigen Ruan,Huogen Li,Mingxiu Wang   

  1. Key Laboratory of Forestry Genetics and Gene Engineering, Nanjin Forestry University Nanjin 210037
  • Received:1995-08-28 Online:1996-09-25 Published:1996-09-25

摘要:

用单色软X射线木材密度计研究了11年生美洲黑杨×小叶杨新无性系年轮密度组成性状遗传变异。结果表明,年轮密度组成各性状无性系间存在极显著差异;年轮密度、早材密度、最小密度、最大密度及木材密度梯度等性状遗传力比较高(h2=0.41-0.58),而晚材密度、早晚材密度比及密度变异幅度等性状遗传力比较低(h2=0.15-0.25);同时各性状遗传力因生长林龄不同而不同。

关键词: 单色软X射线木材密度计, 新无性系, 年轮密度组成性状, 遗传参数

Abstract:

In this paper the genetic variations of ring density component traits of new clones in Populus deltoides×P. simonii were studied. The results show that each trait value of ring density components is obviously different among the clones. The broad heritability of ring density, earlywood density, minimum wood density, maximum wood density and gradient of wood density were high (h2=0. 41-0. 58);but the broad heritability of latewood density, latewood density/earlywood density and variation range of wood density were low (h2=0. 15-0. 25). At different ages the broad heritability of same trait was different.

Key words: Monochromical soft X-ray densitometer, New clones, Ring density components, Genetic parameter