杉木无性系生长性状变异分析及选择初探  

Variation of Growth Traits and Preliminary Selection of Cunninghamia lanceolata Clones

作　　者：赵林峰[1] 高建亮 李有清 Zhao Linfeng;Gao Jianliang;Li Youqing(Hunan Polytechnic of Environment and Biology,Landscape Architecture College,Hengyang,421005)

机构地区：[1]湖南环境生物职业技术学院园林学院,衡阳421005

出　　处：《分子植物育种》2024年第3期892-898,共7页Molecular Plant Breeding

基　　金：湖南自然科学基金课题(2019JJ6028);湖南省林业科技创新杰出青年项目(XLK201981)共同资助。

摘　　要：为初步选育出生长性状优良的杉木无性系资源,以永州市金洞林场21年生杉木无性系试验林为研究对象,对不同林龄无性系生长性状进行调查分析。结果表明:5~21年生时无性系间树高、胸径和材积变异系数变化范围分别为8.45%~13.95%、9.28%~14.26%、22.83%~32.62%;不同林龄无性系间胸径、树高和材积均存在极显著差异;相关性分析结果表明,不同林龄无性系生长性状的相关系数均达到显著水平,且都表现出胸径与材积的相关系数大于树高与材积的相关系数;以胸径为指标选择出4个优良无性系,入选率为6.15%,与对照相比,胸径、树高分别增长24.18%、20.19%;与林分总体相比,胸径、树高分别增长23.94%、20.86%。研究表明21年生选育可靠,选育出来的优良无性系造林可获得巨大的经济效益,可考虑作为优良无性系在永州山区进行推广。In order to select the resources of Chinese fir clones with excellent growth characters,the growth characters of different stand ages were investigated and analyzed by taking the 21-year-old test stand of Chinese fir clones in Jindong Forest Farm of Yongzhou City as the research object.The results showed that the variation coefficients of tree height,DBH and volume were 8.45%~13.95%,9.28%~14.26% and 22.83%~32.62% among the clones at 5~21 years of age,respectively.There were significant differences in DBH,tree height and volume among clones of different stand ages.The results of correlation analysis showed that the correlation coefficients of growth traits of clones of different stand ages reached a significant level,and the correlation coefficients between DBH and volume were greater than that between tree height and volume.Four clones were selected using DBH as the selection index,and the selection rate was 6.15%.Compared with the control,DBH and tree height increased by 24.18% and 20.19%,respectively.Compared with the total stand,DBH and tree height increased by 23.94% and 20.86%,respectively.The results showed that the 21-year-old clones were reliable,and the excellent clones could be popularized as excellent clones for afforestation,which could obtain great economic benefits.

关 键 词：杉木(Cunninghamia lanceolata) 无性系 变异 相关系数 

分 类 号：S791.27[农业科学—林木遗传育种]