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基于马尾松测交系子代的生长、干形和木材密度的配合力分析(PDF)

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

Issue:
2011年02期
Page:
8-14
Column:
研究论文
publishdate:
2011-03-28

Article Info:/Info

Title:
Genetic analysis on combining ability of growth, stem form and wood basic density of Pinus massoniana by testcross mating design
Author(s):
LIU Qinghua1 JIN Guoqing1 CHU Deyu2 QIN Guofeng1 ZHOU Zhichun1*
1. Research Institute of Subtropical Forestry, CAF, Fuyang 311400, China; 2. Laoshan Forest Farm of Chun′an County of Zhejiang Province, Chun′an 311700, China
Keywords:
Pinus massoniana testcrosstrunk straightnesswood basic densitygeneral combining ability (GCA)special combining ability
Classification number :
S722
DOI:
10.3969/j.jssn.1000-2006.2011.02.002
Document Code:
A
Abstract:
The genetic effects of GCA and SCA were estimated for growth, stem form and wood basic density effects for using the 14yearold fullsib progeny of nonselected Pinus massoniana in a testcross mating design. The results showed that the GCA and SCA effects were significant and fullsib family heritability ranged from 0.746 to 0.908 for DBH, height, wood basic density and dry biomass accumulation which indicated these traits were under strong genetic control.Additive effects played a major role for DBH, volume, stem straightness, wood basic density and dry bimoass. Whereas dominance was next genetic control for these traits. Height appeared to be equally subjected to both dominance effect and additive effect, while stem straightness was complete controlled by additive effect. The statistical analysis showed that GCA of 1134, 1127 and 5906 from southeast distribution range of Chinese red pine, were positive and large for DBH, height and wood dry biomass. GCA of 3203, which grew slowly and originated from northern Anhui, was the largest for wood basic density. Among the nine female parents, the GCA of 5476, 5158 and 3205 was large for DBH, height, dry biomass and trunk straightness, while the GCA of 5476 and 5158 was lower than 5910 and 3205 which had large GCA for wood basic density. It was not found that GCA of growth and wood basic density was closely related to latitude of habitat. SCA did not show correspondence with GCA, and varied among traits and crosses. Seven crosses were selected according to individual dry biomass exceeding 20 % of the mean and the score of trunk straightness above 4, which could obtain practical genetic gain about 22.68 %—67.34 % and 20.25 %—60.13 % respectively.

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Last Update: 2011-04-13