文献类型：期刊文献

中文题名：锯材大花序桉生长和材性的综合指数选择

英文题名：Comprehensive index selection on superior growth and wood properties of Eucalyptus cloeziana for saw timber

作者：李昌荣[1] 陈健波[1] 郭东强[1] 翁启杰[2] 卢翠香[1] 李建凡[3] 周维[1] 甘四明[2]

第一作者：李昌荣

机构：[1]广西壮族自治区林业科学研究院,广西南宁530002;[2]中国林业科学研究院热带林业研究所,广东广州510520;[3]玉林市林业科学研究所,广西玉林537501

年份：2019

卷号：43

期号：1

起止页码：1-8

中文期刊名：南京林业大学学报：自然科学版

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：广西林业科技项目(桂林科研[2015]第6号;桂林科字[2014]第04号);广西创新驱动发展资金项目(桂科AA17204087-3);广西主要用材林资源高效培育与利用人才小高地专项(桂人社函[2018]112)

语种：中文

中文关键词：大花序桉;种源/家系;生长;材性;综合指数选择

外文关键词：Eucalyptus cloeziana;provenance/family;growth;wood property;comprehensive index selection

分类号：S718.46

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(ρBD),green density(ρGD),modulus of elasticity in static bending(EMOE),modulus of rupture(σMOR),and compressive strength parallel to grain(σc)were measured using near-infrared(NIR)spectroscopy.Multi-trait selection incorporated tree height(H),diameter at breast height(D),individual tree volume(V),ρGD,ρBD,EMOE,σMORandσcusing the Smith-Hazel index selection procedure.【Results】The trial averages for D,H,V,ρGD,ρBD,EMOE,σMORand σc 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-cant differences among provenances (P <0.01)and among families within a provenance (P <0.05).The significant genetic variation for these traits indicated the strong potential for genetic improvement through selection at both provenance and family levels.Genetic correlations were significantly positive between growth traits and were not different from zero between wood properties.The additive genetic correlations were not significantly negative between D and ρBD,but were extremely significantly negative between D and EMOE,ρGD and σMOR,and significantly negative between D and σc. The genetic advance of D direct selection was 410.2% and the effect of D direct selection was the best.The indirect selection efficiency of D to V was 174.3%,and the indirect selection of ρBD to other wood properties was positive,ρBD to σc had the highest selection efficiency.The superior provenances selected using index selection were from the southern coastal area of the native range of the species in Australia.[Conclusion]The wood mechanical properties of 9.5 year-old E.cloeziana were similar to that of Pterocarpus L.,which is a well-known high-value timber used for the production of furniture.The additive genetic correlations were negatively significant between growth traits and wood mechanical traits, posing a challenge for concomitant improvement of growth and wood traits.The indirect selection effect of growth to wood properties was small,whereas PBD had a favorable indirect selection effect with other wood properties.Trees could be selected using the comprehensive index selection method to identify a production population that would provide seed with inherently superior growth and wood properties required to develop high-value forest products.