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Estimation of Genetic Parameters and Wood Yield Selection Index in a Clonal Trial of Korean Pine ( Pinus koraiensis ) in Northeastern China

Author

Listed:
  • David Kombi Kaviriri

    (State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China
    Department of Natural Resources Management, Faculty of Agricultural Sciences, University of Kinshasa, P.O. Box 117, Kinshasa XI 023, Congo)

  • Huanzhen Liu

    (State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China)

  • Xiyang Zhao

    (State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin 150040, China)

Abstract

In order to determine suitable traits for selecting high-wood-yield Korean pine materials, eleven morphological characteristics (tree height, basal diameter, diameter at breast height, diameter at 3 meter height, stem straightness degree, crown breadth, crown height, branch angle, branch number per node, bark thickness, and stem volume) were investigated in a 38-year-old Korean pine clonal trial at Naozhi orchard. A statistical approach combining variance and regression analysis was used to extract appropriate traits for selecting elite clones. Results of variance analysis showed significant difference in variance sources in most of the traits, except for the stem straightness degree, which had a p -value of 0.94. Moderate to high coefficients of variation and clonal repeatability ranged from 10.73% to 35.45% and from 0.06% to 0.78%, respectively. Strong significant correlations on the phenotypic and genotypic levels were observed between the straightness traits and tree volume, but crown breadth was weakly correlated to the volume. Four principal components retaining up to 80% of the total variation were extracted, and stem volume, basal diameter, diameter at breast height, diameter at 3 meter height, tree height, and crown height displayed high correlation to these components (r ranged from 0.76 to 0.98). Based on the Type III sum of squares, tree height, diameter at breast height, and branch number showed significant information to explain the clonal variability based on stem volume. Using the extracted characteristics as the selection index, six clones (PK105, PK59, PK104, PK36, PK28, and K101) displayed the highest Qi values, with a selection rate of 5% corresponding to the genetic gain of 42.96% in stem volume. This study provides beneficial information for the selection of multiple traits for genetically improved genotypes of Korean pine.

Suggested Citation

  • David Kombi Kaviriri & Huanzhen Liu & Xiyang Zhao, 2021. "Estimation of Genetic Parameters and Wood Yield Selection Index in a Clonal Trial of Korean Pine ( Pinus koraiensis ) in Northeastern China," Sustainability, MDPI, vol. 13(8), pages 1-17, April.
  • Handle: RePEc:gam:jsusta:v:13:y:2021:i:8:p:4167-:d:532423
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    Cited by:

    1. Vítor João Pereira Domingues Martinho, 2022. "Forest Resources Management: An Editorial," Sustainability, MDPI, vol. 14(6), pages 1-2, March.

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