摘要
为获得影响赤桉Eucalyptus camaldulensis家系抗风性能的主要因子,筛选能生产应用的优良抗风家系,在连续3 a调查114个赤桉家系高产抗风家系排序基础上,选取50个赤桉家系为材料,对其生长性状(树高、胸径、单株材积),材性性状(木材基本密度、纤维长度、纤维宽度、纤维长宽比),材性相关的无损指标(Pilodyn值、应力波值)以及台风风害指数进行了测定和分析。结果表明:除胸径(P=0.062),纤维长宽比(P=0.636)和树皮厚度(P=0.174)外,家系在各性状间差异均达到极显著水平(P<0.01),单株、家系遗传力变化范围分别为0.046~0.885和0.077~0.777,纤维宽度、树高、木材基本密度、应力波值等性状具有高遗传力。各性状变异系数范围为5.11%~87.57%,遗传变异系数范围为1.78%~34.57%,环境变异系数范围为4.43%~80.74%,风害指数和单株材积变异较大,有利于优良抗风家系的评价选择。相关性分析结果表明:赤桉纤维长度与木材基本密度、Pilodyn值、应力波值呈及显著相关,纤维宽度与生长性状(树高、胸径、单株材积、树皮厚度)呈极显著相关。风害指数与木材纤维长度、纤维长宽比相关性不显著,与树高、单株材积达极显著相关,与应力波值、树皮厚度呈显著相关,与胸径、Pilodyn值、木材基本密度相关性不显著,树高、单株材积与风害指数的相关关系在遗传、环境及表型上均高于其他性状。通过综合选择筛选出5个优良抗风家系,分别为家系2007,2006,20027,2005,2008,其遗传增益范围为0.53~22.39。
To find the main influencing factors of wind resistance in Eucalyptus camaldulensis and to select excellent high-yielding and wind-resistant families for production, this research, based on a three-year successive study of 114 E. camaldulensis provenance families, selected 50 of the families as the study material. Growth traits（tree height, diameter at breast height-DBH, and individual volume）, wood properties（wood density,fiber length, fiber width, and ratio of fiber length to width）, non-destructive wood traits（Pilodyn penetration value and stress-wave value）, and wind damage indexes were measured and analyzed using SPSS and Genstat7.0 Statistics. Results showed that differences in traits were highly significant（P〈0.01）, except for DBH（P =0.062）, ratio of fiber length to width（P = 0.636）, and bark thickness（P = 0.174）. Single stand heritabilities were 0.046-0.885, and family heritabilities were 0.077-0.777; fiber width（0.684）, tree height（0.590）, wood density（0.643）, and stress-wave value（0.777） also had high heritability. The range of phenotypic variation coefficients was 5.11%-87.57%; coefficients of genetic variation were 1.78% to 34.57%; and coefficients of environmental variation were 4.43% to 80.74%. The variation of wind damage index and individual volume was higher, which was help to the selection of excellent wind-resistant families. The correlation analysis was significant between fiber length and wood properties（wood density（r = 0. 234）, Pilodyn penetration value（r =-0.169）, and stress-wave value（r =-0.514））, and also between fiber width and growth traits（tree height（r =-0.253）, DBH（r =-0.323）, and individual volume bark thickness（r =-0.323））. Meanwhile, wind damage indexes were significantly correlated to tree height（r =-0.607）, individual volume（r =-0.346）, stress-wave value（r =-0.123）, and bark thickness（r =-0.120）, but not to wood fiber length, ratio of fiber length to width,DBH, Pilodyn penetration valu
出处
《浙江农林大学学报》
CAS
CSCD
北大核心
2017年第6期1029-1037,共9页
Journal of Zhejiang A&F University
基金
国家自然科学基金面上项目(31570615)
"十三五"国家重点研发计划项目(2016YFD0600500)
关键词
林木遗传育种学
赤桉
抗风性
相关性
遗传分析
forest tree breeding
Eucalyptus camaldulensis
wind resistance
correlation
genetic analysis
