38年生马尾松种源生长及材性联合分析  

Joint analysis of growth and wood property of 38-year-old Pinus massoniana from 55 provenances

作　　者：胡兴峰 吴帆 孙晓波 陈厚平 殷安政 季孔庶[1] HU Xingfeng;WU Fan;SUN Xiaobo;CHEN Houping;YIN Anzheng;JI Kongshu(Key Laboratory of Forest Genetics&Biotechnology of Ministry of Education,Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037,China;State-owned Forest Tree Breeding Farm,Yu'an District,Lu'an City,Anhui Province,Lu'an 237010,China)

机构地区：[1]南京林业大学林木遗传与生物技术省部共建教育部重点实验室,南方现代林业协同创新中心,江苏南京210037 [2]安徽省六安市裕安区国有林木良种场,安徽六安237010

出　　处：《南京林业大学学报（自然科学版）》2022年第3期203-212,共10页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家重点研发计划(2017YFD0600304);江苏高校优势学科建设工程资助项目(PAPD)。

摘　　要：【目的】通过分析已达成熟期的马尾松种源生长与材性变异,揭示不同性状在地理种源上的变异规律,并筛选适合在安徽省六安市及类似立地区域推广的速生且材质优良的纸浆材种源。【方法】以安徽省六安市裕安区国有林木良种场的38年生(成熟林)马尾松55个种源为试材,测定其胸径、树高、管胞长度及宽度、基本密度和微纤丝角,进行生长与材性联合分析。【结果】胸径、树高、材积、管胞长度、管胞宽度、微纤丝角和基本密度在种源水平上均差异极显著(P<0.01)。各性状表型变异系数、遗传变异系数分别为3.02%~58.61%、5.56%~28. 16%;胸径、树高、材积、管胞长度、管胞宽度、基本密度和微纤丝角种源遗传力分别为0.665 7、0.558 9、0.616 9、0.996 3、0.965 6、0.739 3和0.823 3。相关性研究表明:生长性状与纬度呈显著负相关,与经度相关不显著;材性与经纬度均相关不显著,但表现出局部的变异规律;生长性状间相关性高于生长与材性间相关性;微纤丝角从髓心至树皮总体随着龄级的增大而减小,木材基本密度、管胞长和宽从髓心至树皮总体随着龄级的逐渐增大而增大,变化幅度随着龄级的增大而减小。通过综合指数选择出5个综合性状优良种源,其胸径、树高、材积、管胞长度与宽度、基本密度和微纤丝角平均遗传增益分别为3.69%、5.72%、15.12%、7.05%、-1.12%、0.17%和-6.46%。【结论】成熟林马尾松种源间差异显著,并且生长性状存在从南向北逐渐减小的变异规律,材性与经纬度不相关,对其进行纸浆材生长与材性联合选择具一定潜力,可为纸浆材马尾松良种选择提供可靠依据。【Objective】The growth provenance and wood property variation of mature masson pine(Pinus massoniana)are studied, revealing the variation rules for different traits at the level of geographical provenance, and screeningsuitable provenances for Lu’an City in Anhui Province and similar geographical areas.【Method】 We selected the state-owned forest tree seed field in Yu’an District, Lu’an City, Anhui Province as the experimental site. 55 provenances wereselected for 38-year-old(mature forest)P. massonianaas the test material. The tree height, diameter at breast height(DBH) volume, length and width of tracheid, basic density and microfibril angle are combined to analyze the growthand material properties.【Result】It was found that the diameter at breast height, tree height, volume, tracheid length,tracheid width, microfibril angle and basic density all showed highly significant differences at the provenance level(P<0.01). The variation range of the phenotypic coefficients of variation and the genetic variation coefficients of each traitare 3. 02%-58.61% and 5.56%-28.16%, respectively. The provenance heritability of the DBH, tree height, volume,tracheid length, tracheid width, basic density and microfibril angle are 0.665 7, 0.558 9, 0.616 9, 0.996 3, 0.965 6,0.739 3 and 0. 823 3, respectively. Growth traits are significantly negatively correlated with latitude, and are notsignificantly different from longitude. Wood properties at different latitude and longitude are both insignificantly different,but show local variation. In the correlation study, it was found that the correlation between growth traits is higher thanthat between growth and wood properties. The microfibril angle from the medulla core to the bark decreases with increasein age. The basic wood density, tracheid length and width from the pith to the bark increases with the gradual increase inage class, and the range of change decreases with the increase in age class. Through the comprehensive index, fiveprovenances were selected with excell

关 键 词：马尾松 种源 基本密度 管胞 微纤丝角 材性 

分 类 号：S722[农业科学—林木遗传育种]