锯材大花序桉生长和材性的综合指数选择
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摘要
【目的】大花序桉是锯材培育的潜力树种,以锯材利用为选育目标,生产选择出生长和材质兼优的大花序桉种源和家系。【方法】以广西玉林市林科所9.5年生的大花序桉种源/家系试验林为研究材料,采用SmithHazel综合指数选择法对胸径(D)、树高(H)、单株材积(V)、生材密度(ρ_(GD))、基本密度(ρ_(BD))、抗弯弹性模量(E_(MOE))、抗弯强度(σ_(MOR))和顺纹抗压强度(σ_c)进行多性状综合选择。【结果】D、H、V、ρ_(GD)、ρ_(BD)、E_(MOE)、σ_(MOR)和σ_c平均值分别为20.6 cm、20.0 m、0.307 m~3、1.109 g/cm~3、0.659 g/cm~3、14.7 GPa、158.2 MPa和63.3 MPa。生长和材性性状种源间差异极显著,种源内家系间差异显著。生长性状间呈极显著的遗传正相关,生长性状与材性间呈负的遗传相关,材性性状间呈正的遗传相关。胸径对单株材积间接选择效率达174.3%,基本密度对其他材性性状的间接选择呈正向效应。多性状综合指数法选出较好的种源为南部近沿海种源。【结论】9.5年生的大花序桉木材力学性能跟家具用高级木材紫檀属的相似。大花序桉生长性状对材性性状间接选择效果不好,基本密度对其他材性性状的间接选择效果较好。多性状综合指数法可以选择出部分生长和材质兼优的家系。
【Objective】Eucalyptus cloeziana is one of the most promising Eucalyptus species for high-value solid wood production and a saw timber breeding objective has been developed for southern China.The purpose of this research was to select provenances and families with superior growth and wood properties.【Method】The 9.5 year-old provenance/family testing forest of E.cloeziana was used as the research materials.The E.cloeziana testing forest was comprised of 115open-pollinated families of 17 provenances were planted at the Yulin Forestry Research Institute(110°09'E,22°39'N),Guangxi Province,China in May 2004.The progeny seeds were provided by the Australian Tree Seed Centre(Canberra,Australia).The trial was laid out in randomized complete blocks along the contours,with 30 replicates of single tree plots.Wood mechanical properties at 9.5 years of age,including basic density(ρ_(BD)),green density(ρ_(GD)),modulus of elasticity in static bending(E_(MOE)),modulus of rupture(σ_(MOR)),and compressive strength parallel to grain(σ_c)were measured using near-infrared(NIR)spectroscopy.Multi-trait selection incorporated tree height(H),diameter at breast height(D),individual tree volume(V),ρ_(GD),ρ_(BD),E_(MOE),σ_(MOR)andσ_cusing the Smith-Hazel index selection procedure.【Results】The trial averages for D,H,V,ρ_(GD),ρ_(BD),E_(MOE),σ_(MOR)and σ_c were 20.6 cm,20.0 m,0.307 m~3,1.109g/cm~3,0.659 g/cm~3,14.7 GPa,158.2 MPa and 63.3 MPa,respectively.Growth and wood properties exhibited signifi-
【Objective】Eucalyptus cloeziana is one of the most promising Eucalyptus species for high-value solid wood production and a saw timber breeding objective has been developed for southern China.The purpose of this research was to select provenances and families with superior growth and wood properties.【Method】The 9.5 year-old provenance/family testing forest of E.cloeziana was used as the research materials.The E.cloeziana testing forest was comprised of 115open-pollinated families of 17 provenances were planted at the Yulin Forestry Research Institute(110°09'E,22°39'N),Guangxi Province,China in May 2004.The progeny seeds were provided by the Australian Tree Seed Centre(Canberra,Australia).The trial was laid out in randomized complete blocks along the contours,with 30 replicates of single tree plots.Wood mechanical properties at 9.5 years of age,including basic density(ρ_(BD)),green density(ρ_(GD)),modulus of elasticity in static bending(E_(MOE)),modulus of rupture(σ_(MOR)),and compressive strength parallel to grain(σ_c)were measured using near-infrared(NIR)spectroscopy.Multi-trait selection incorporated tree height(H),diameter at breast height(D),individual tree volume(V),ρ_(GD),ρ_(BD),E_(MOE),σ_(MOR)andσ_cusing the Smith-Hazel index selection procedure.【Results】The trial averages for D,H,V,ρ_(GD),ρ_(BD),E_(MOE),σ_(MOR)and σ_c were 20.6 cm,20.0 m,0.307 m~3,1.109g/cm~3,0.659 g/cm~3,14.7 GPa,158.2 MPa and 63.3 MPa,respectively.Growth and wood properties exhibited signifi-
引文
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[10]LI C,WENG Q,CHEN J B,et al. Genetic parameters for growth and wood mechanical properties in Eucalyptus cloeziana F. Muell[J]. New Forests,2017,48(1):33-49. DOI:10. 1007/s11056-016-9554-4.
[11]杨中宁,项东云,陈健波,等.大花序桉种源木材纤维特性变异研究[J].广西林业科学,2011,40(1):8-11. DOI:10.3969/j.issn.1006-1126.2011.01.003.YANG Z N,XIANG D Y,CHEN J B,et al. Study on variation of fiber characteristics of Eucaplyptus cloeziana provenances[J].Guangxi Forestry Science,2011,40(1):8-11.
[12]李昌荣,项东云,陈健波,等.大花序桉木材基本密度的变异研究[J].中南林业科技大学学报,2012,32(6):158-162.DOI:10.14067/j.cnki.1673-923x.2012.06.010.LI C R,XIANG D Y,CHEN J B,et al. Study on wood basic density variation of Eucalyptus cloeziana[J]. Journal of Central South University of Forestry&Technology, 2012, 32(6):158-162.
[13]周维,卢翠香,杨中宁,等.大花序桉种源幼林木材力学性质研究[J].西南林业大学学报,2014,34(6):75-80. DOi:10.3969/j.issn.2095-1914.2014.06.013.ZHOU W,LU C X,YANG Z N,et al. Study on juvenile wood’s mechanical properties of Eucalyptus cloeziana provenances[J].Journal of Southwest Forestry University,2014,34(6):75-80.
[14]翟新翠,项东云,陈健波,等.大花序桉种源/家系遗传变异与早期选择研究[J].广西林业科学,2007,36(1):26-30.DOI:10.3969/j.issn.1006-1126.2007.01.007.ZHAI X C,XIANG D Y,CHEN J B,et al. Genetic variation and early selection of the provenances/families of Eucalyptus cloeziana[J]. Guangxi Forestry Science,2007,36(1):26-30.
[15]项东云,王明庥,黄敏仁,等.大花序桉木材抗弯弹性模量变异研究[J].华南农业大学学报,2012,33(1):73-76. DOI:10.3969/j.issn.1001-411X.2012.01.015.XIANG D Y,WANG M X,HUANG M R,et al. Variations of modulus of elasticity in Eucalyptus cloeziana wood[J]. Journal of South China Agricultural University,2012,33(1):73-76.
[16]陈健波,项东云,张照远,等.大花序桉木材顺纹抗压强度变异研究[J].林业科技开发,2009,23(4):63-66. DOI:10.3969/j.issn.1000-8101.2009.04.015.CHEN J B,XIANG D Y,ZHANG Z Y,et al. Studies on longitudinal compressive strength variance of Eucalyptus cloeziana[J].China Forestry Science and Technology,2009,23(4):63-66.
[17]盛志廉,陈姚生.数量遗传学[M].北京:科学出版社,1999.SHENG Z L,CHEN Y S. Quantitative genetics[M]. Beijing:Science Press,1999.
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