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Study and comprehensive evaluation on wood density, main chemical components and tracheid morphology of Ginkgo biloba clones
LI Xiongjie, GAO Tianhui, CHAO Jinyi, WANG Yeqiao, TU Haochuan, ZHENG Jingjing, WANG Guibin, YU Pengfei
Journal of Nanjing Forestry University (Natural Sciences Edition) ›› 2025, Vol. 49 ›› Issue (6) : 171-180.
PDF(1829 KB)
PDF(1829 KB)
Study and comprehensive evaluation on wood density, main chemical components and tracheid morphology of Ginkgo biloba clones
【Objective】This study aims to elucidate the differences in wood properties among Ginkgo biloba clones and to screen for superior clones, thereby providing a theoretical basis for the breeding of high-quality timber clones, wood processing and utilization, and directional cultivation.【Method】22 G. biloba clones from a germplasm nursery in Pizhou City, Jiangsu Province, were studied. Variation patterns in 11 wood property traits: including basic wood density, main chemical components (cellulose, hemicellulose, lignin), and tracheid morphological characteristics (length, width, lumen diameter, wall thickness, length-to-width ratio, wall-to-lumen ratio) were analyzed. Wood quality of these clones was evaluated using the membership function method and the Bregman multi-trait comprehensive evaluation method to screen for superior timber-purpose clones.【Result】Except for the tracheid length-to-width ratio, the other 10 wood property traits exhibited highly significant differences among clones (P<0.01). The coefficients of variation (CV) for these traits ranged from 9.21% to 23.81%, and repeatability ranged from 0.316 to 0.988. Correlation analysis revealed that basic wood density was significantly positively correlated with cellulose and lignin content (P<0.01). Additionally, tracheid length, width, and lumen diameter were significantly positively correlated with each other (P<0.01). The membership function method ranked clones 37 and 23 as the top two. Using the Breggin method with a 10% selection rate, clones 37 and 23 were also selected. The genetic gain for the wood properties of these selected clones ranged from -10.13% to 10.03%. Both evaluation methods yielded consistent results: clones 37 and 23 exhibited higher basic density, longer tracheid length, a larger length-to-width ratio, higher cellulose content, lower lignin content, and a smaller wall-to-lumen ratio, meeting the criteria for high-quality fiber material.【Conclusion】Basic wood density is substantially controlled by genetics, indicating considerable potential for selection. Based on the comprehensive evaluation results, clones 37 and 23 characterized by long tracheid length and low lignin content, are recommended as superior fiber timber clones for practical application in production.
Ginkgo biloba / clones / phenotypic variation / repeatability / wood properties / comprehensive assessment method
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