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Bulletin of Botanical Research ›› 2022, Vol. 42 ›› Issue (1): 130-137.doi: 10.7525/j.issn.1673-5102.2022.01.014

• Research Report • Previous Articles     Next Articles

Variation Analysis of Growth Traits of Larix olgensis Parental Clones in Seed Orchards

Dandan Zhang1, Xiang Li1, Biying Wang1, Xihe Wang2, Quan Sun2, Yunyang Wu2, Pingyang Li2, Deyao Li2, Yulei Li2, Xiyang Zhao1()   

  1. 1.State Key Laboratory of Tree Genetics and Breeding,School of Forestry,Northeast Forestry University,Harbin 150040
    2.Qinhe Seed orchards,Nation Improved Variety Base of Wangqing Forestry Branch Office,Wangqing 133219
  • Received:2021-03-18 Online:2022-01-20 Published:2021-12-30
  • Contact: Xiyang Zhao E-mail:zhaoxyphd@163.com
  • About author:Zhang Dandan(1987—),female,master,mainly engaged in larix genetic and improvement.
  • Supported by:
    National Key Research and Development Program of China(2017YFD0600402)


The growth of parental clones was neglected in seed orchards though many Larix olgensis seed orchards had been built for several years in Northeast China. In this research, 49 L. olgensis parental clones were used as materials, many growth traits were investigated and analyzed respectively. ANOVA results showed that there was significant difference among 49 clones in each growth traits. The phenotypic variation and genetic variation coefficients of different traits ranged from 7.71%-31.93% and 2.05%-12.55%, respectively. The repeatability of different traits ranged from 0.44-0.76, high repeatability and variation coefficients were beneficial for selection of elite clones. The correlation of most growth traits including tree height was extremely significant showed that each growth traits affected each other. The results of principal component analysis showed that the contribution rate of the first principal component was 61.44%, which mainly represented biomass traits. Comprehensive evaluation of L. olgensis parental clones were conducted based on the results of principal component analysis, clone L76, L5, L7, L12 and L4 were selected as elite clones, the genetic gain of different growth traits ranged from 3.55%-15.50%, the selected clones could provide materials for tree breeding of L. olgensis.

Key words: Larix olgensis, parental clones, variation coefficients, repeatability, selection

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