杂交鹅掌楸无性系生长与木材材性分析  

Analysis on Growths and Wood Properties of Liriodendron Hybrids Clones

作　　者：胡萍 杨爱红[1] 胡淼[1] 吴敬芳 余小玲 余发新[1] Hu Ping;Yang Aihong;Hu Miao;Wu Jingfang;Yu Xiaoling;Yu Faxin(Institute of Biological Resources,Jiangxi Academy of Sciences,Jiangxi Provincial Key Laboratory of Improved Variety Breeding and Efficient Utilization of Native Tree Species,Nanchang,Jiangxi 330096,China)

机构地区：[1]江西省科学院生物资源研究所、江西乡土树种良种选育与高效利用江西省重点实验室,江西南昌330096

出　　处：《广西林业科学》2025年第1期13-19,共7页Guangxi Forestry Science

基　　金：江西省重点研发项目(20203BBF63025);国家自然科学基金项目(32060312);江西省科学院重点研发项目(2021YSBG22025);中央财政林业科技推广项目(JXTG[2022]01)。

摘　　要：为掌握杂交鹅掌楸(Liriodendron Hybrids)无性系生长性状和木材材性变异水平,为优良品种选育提供参考,以树干通直和生长量较大的10个杂交鹅掌楸无性系为试验材料,对其生长性状和木材材性进行测定与分析,并开展优良无性系选择。结果表明,10个杂交鹅掌楸无性系树高为8.70~14.80 m,胸径为9.10~15.80 cm,单株材积为0.029~0.135 m3,木材基本密度为0.325~0.573 g/cm3,木材纤维长为1211.33~2125.22μm,木材纤维宽为21.51~35.97μm,木材纤维长宽比为46.33~67.57,木材木质素含量为19.55%~24.18%,木材纤维素含量为45.08%~56.08%,木材半纤维素含量为17.69%~22.38%。各性状表型变异系数为5.94%~45.21%;各性状在无性系间均差异极显著;除木材纤维长宽比外,其他性状间均呈显著或极显著相关。杂交鹅掌楸无性系间遗传变异丰富,具有较大选育潜力。通过多性状综合评价,筛选出5个优良无性系(2-3-0、23、祥17、7和29);与10个无性系均值相比,入选无性系的最优平均树高、平均胸径、木材平均基本密度和木材平均纤维长宽比分别高出27.1%、21.6%、22.7%和16.6%,可作为今后良种选育的材料。In order to grasp variation levels of growth traits and wood properties of Liriodendron Hybrids clones,and provide references for improved variety breeding,ten Liriodendron Hybrids clones with straight trunks and large growths were used as experimental materials.Their growth traits and wood properties were measured and analyzed,and selection of improved clones was carried out.Results showed that tree heights of ten Liriodendron Hybrids clones were 8.70-14.80 m,DBHs were 9.10-15.80 cm,individual volumes were 0.029-0.135 m3,wood basic densities were 0.325-0.573 g/cm3,wood fiber lengths were 1211.33-2125.22μm,wood fiber widths were 21.51-35.97μm,wood fiber length-width ratios were 46.33-67.57,wood lignin contents were 19.55%-24.18%,wood cellulose contents were 45.08%-56.08%,and wood hemicellulose contents were 17.69%-22.38%.Phenotypic variation coefficients of various traits were 5.94%-45.21%.Differences of various traits among clones were extremely significant.Except for wood fiber length-width ratio,there were significant or extremely significant correlations among other traits.There were abundant genetic variations and greater breeding potentials among Liriodendron Hybrids clones.Through comprehensive evaluation of multiple traits,five improved clones(2-3-0,23,Xiang17,7 and 29)were selected.Compared with means of ten clones,optimal average tree height,average DBH,wood average basic density and wood average fiber length-width ratio of selected clones were higher by 27.1%,21.6%,22.7%and 16.6%respectively,which could be used as materials for improved variety breeding in the future.

关 键 词：生长性状 木材材性 遗传变异 选择 杂交鹅掌楸无性系 

分 类 号：S792.21[农业科学—林木遗传育种]