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

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