银杏无性系木材密度、主要化学成分和管胞形态的研究及综合评价

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中图分类号：S727.1 文献标志码：A 文章编号：1000-2006（2025）06-0171-10

Abstract：【Objective】Thisstudyaims to elucidatethediferencesin wood propertiesamong Ginkgo bilobaclonesand to screen forsuperiorclones，therebyprovidingatheoretical basis forthebreeding of high-qualitytimber clones，wood processingandutilization，and directional cultivation.【Method】22G.biloba clones from a germplasm nursery in Pizhou City，JiangsuProvince，werestudied.Variationpaternsin11wood propertytraits：includingbasic ooddensity，main chemical components（cellulose，hemicellose，lignin），and tracheidmorphological characteristics（length，width， lumendiameter，wallthickness，length-to-widthratio，wall-to-lumenratio）were analyzed.Woodqualityof theseclones was evaluated using the membership function method and theBregman multi-trait comprehensive evaluationmethod to screen forsuperior timber-purpose clones.【Result】Except for the tracheid length-to-width ratio，the other1O wood property traits exhibited highly significant differences among clones（ P/<0.01 ）.Thecoefficients of variation（CV）for these traits ranged from 9.21% to 23.81% ，and repeatability ranged from O.316 to O.988. Correlation analysis revealed thatbasic wood density was significantly positively correlated with cellulose and lignin content （ P<0.01 ）.Additionally， tracheid length，width，and lumen diameter were significantlypositively 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，clones37and23 werealsoselected.Thegeneticgainforthewood propertiesof theseselected 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-widthratio，highercellulosecontent，lower lignin content，anda smaler wall-to-lumenratio，meeting thecriteria for high-qualityfiber material.【Conclusion】Basic wood densityis substantiallcontrolledbygenetics，indicatingconsiderablepotentialforselection.Basedonthecomprehensive evaluationresults，clones 37and 23 characterizedbylong tracheid length andlow lignin content，are recommended as superior fiber timberclones for practical application inproduction.

Keywords：Ginkgo biloba；clones；phenotypicvariation；repeatability；wod properties；comprehensive assessment method

森林是地球上最重要资源之一，其所产生的木材是人类最早利用的可再生资源，被认为是世界四大材料（木材、钢铁、塑料、水泥）之一。（剩余18684字）