Affiliation: | 1.Key Lab of State Forest and Grassland Administration On “Wood Quality Improvement and High Efficient Utilization”, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China ;;2.Yangkou State Owned Forest Farm of Fujian Province, Nanping, China ;;3.Department of Natural Resources and Earth Science, Shahrekord University, Shahrekord, 64165478, Iran ; |
Abstract: | This work focuses on the genetic variation of Chinese fir clones in the radial direction. Four 20-year-old Chinese fir clones were selected in Kaihua Forest Farm, Zhejiang, China, and the differences and genetic characteristics were studied. Clonal repeatability, genotype coefficient of variable, and phenotypical coefficient of variable were calculated to light on the genetic variation on the radial direction. Results showed significant differences (P?0.05) between the clones and annual rings of the same clone. The clonal repeatability of the ten wood properties is ranged from 0.5 to 0.8, wherein the fiber length, elastic modulus, and total dry density are higher than 0.7. For all the measured traits, the phenotypic variation of clones is greater than that of the genetic variation. Overall, the measured wood traits, especially the mechanical and physical properties, are strongly controlled by heredity, which means they are potentially helpful for genetic improvement of wood properties and optimal breeding. Furthermore, the clonal repeatability of the measured traits varies between annual rings, and the physical and mechanical properties are relatively stable. The principal component analysis results reveal that the clone of Kai 13 has the highest score. |