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Bulletin of Botanical Research ›› 2022, Vol. 42 ›› Issue (3): 383-393.doi: 10.7525/j.issn.1673-5102.2022.03.008

• Genetic and Breeding • Previous Articles     Next Articles

Genetic Variation and Joint Selection of Growth and Wood Traits in Half-sib Families of Larix olgensis

Xueyan ZHOU1, Biying WANG1, Xuefeng HAO2, Xinguo HU2, Jiangtao WU2, Kai LANG2, Qinbo HU2, Xiyang ZHAO1()   

  1. 1.State Key Laboratory of Tree Genetics and Breheding,Northeast Forestry University,Harbin 150040
    2.Wangqing Forestry Bureau of Jilin Province,Wangqing 133200
  • Received:2020-10-15 Online:2022-05-20 Published:2022-05-20
  • Contact: Xiyang ZHAO E-mail:zhaoxyphd@163.com
  • About author:ZHOU Xueyan(1994—),female,master,major in tree genetic and improvement.
  • Supported by:
    National Key Research and Development Program of China(2017YFD0600402)


As the important timber tree in Northeast China,comprehensive selection based on growth traits and wood traits was essential for Larix olgensis. A total of 49 half-sib families of L. olgensis at 32-year-old from Wangqing Forestry Bureau, in Yanbian Korean Autonomous Region of Jilin Province was selected as materials. Nine growth traits(tree height, ground diameter, diameter of breast height, diameter of stem at 3 m height, volume, taperingness, crown width, branch angle and stem straightness degree) and four wood traits(wood density, tracheid length, tracheid width and tracheid length-width ratio) were measured and analyzed respectively. The difference of all traits among different sources of variation reached extremely significant levels(P<0.01). The heritability of all traits was high(0.51-0.96). The range of phenotypic variation coefficient was 3.04%(branch angle)-23.15%(crown width). The correlation coefficient ranged from -0.367(tracheid width and tracheid length-width ratio) to 0.994(diameter of breast height and volume). Principal component analysis showed that the cumulative contribution rate of the four principal components reached 78.46%, which included most of the information about the growth traits and wood traits of the pedigree. The pedigrees were evaluated by growth and wood traits, respectively. Five elite pedigrees with good growth(S78, S81, S80, S84 and S83), five elite pedigrees with good wood quality(S37, S51, S6, S30 and S19), and five elite pedigrees combined with growth and wood traits(S89, S74, S76, S82 and S83) were selected respectively. The selected materials could provide the basis for breeding superior varieties and improving seed orchards construction.

Key words: Larix olgensis, growth traits, wood traits, genetic variation, joint selection

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