我们的网站为什么显示成这样?

可能因为您的浏览器不支持样式,您可以更新您的浏览器到最新版本,以获取对此功能的支持,访问下面的网站,获取关于浏览器的信息:

|Table of Contents|

杉木木材材性的遗传和变异研究——Ⅱ.杉木种子园自由授粉子代间木材密度的遗传变异和性状之间的相关性(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
1987年04期
Page:
15-25
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
INHERITANCE AND VARIATION OF THE WOOD PROPERTIES OF CHINESE FIR II.THE GENETIC VARIATION AMONG OPEN-POLLINATED PROGENIES PRODUCED FROM A SEED ORCHARD OF CHINESE FIR AND THE CORRELATIONS BETWEEN SEVERAL TRAITS
Article ID:
1000-2006(1987)04-0015-11
Author(s):
Shi Jisen Ye Zhihong & Cheng Yeuwu
Department of Forestry
Keywords:
Cunninghamia lanceolata Wood specific gravity Mechanical properties Open-pollinated progenies Variation among families Juvenile wood selection Heritability
Classification number :
-
DOI:
10.3969/j.jssn.1000-2006.1987.04.002
Document Code:
A
Abstract:
This paper reports the results on 38 12-year-old open-pollinated progenies produced fiom a seed orchard of Chinese fir. The major conclusions are presented as follows: (1) Significant differences among and within 38 open-pollinated families are found for wood specific gravity (SG). This implies that there arc abundant variation sources for selection. (2) Heritability values for SG by progeny analysis arc 0.29 (on an individual basis) and 0,50 (on family mean basis) while from offspring-parent analysis 0.33+G.16 Therefore, it appears that there is a medium degree of genetic control for SG. (3) The weak correlations between SG and volume, for both phenotypic (-0.24) and genetic (-0.199), indicate that it is feasible to develop strains of Chines fir that have high specific gravity and also grow rapidly when they arc young. (4) There are significant correlations between several major mechanical properties (such as modulus of elasticity in static bending (MOE), modulus of rupture (MOR), maximum crushing strength in compressive parallel to grain (MCS), impact bending strength (IBS)) andSG, with correlation coefficients from 0.73 to 0.92. This implies that the selection for juvenile wood of above average SG and mechanical properties can be improved in some degree. Finally, several fundamental problems in wood property improvement of Chinese fir are discussed.

References

-

Last Update: 1900-01-01