杉木无性系生长和材性变异及多性状指数选择  

Clonal Variation in Growth and Wood Quality and the Multi-Trait Index Selection of Chinese Fir

作　　者：王润辉[1] 胡德活[1] 郑会全[1] 韦茹萍[1] 黄越茂 蔡维就 

机构地区：[1]广东省林业科学研究院,广州510520 [2]广东省肇庆市国有林业总场大坑山林场,肇庆526400

出　　处：《林业科学》2012年第3期45-50,共6页Scientia Silvae Sinicae

基　　金：国家林业局林业公益性行业科研专项(201004050);广东省科技厅省院全面战略合作项目(2010B090301029);广东省林业科技创新专项(2010KJCX007-1)

摘　　要：对19年生和17年生2块杉木无性系测定林开展生长和材性变异及多性状指数选择研究,其中,19年生测定林包括38个参试无性系,17年生测定林包括102个参试无性系。2块测定林数据分析结果均显示:无性系树高、胸径、单株材积、心材率和木材基本密度存在极显著的遗传差异,无性系重复力达中等偏上至较高水平,遗传变异系数各性状间差异较大;树高、胸径、材积生长性状间存在极显著的表型和遗传相关,与基本密度存在弱负相关。不同选择方法的结果表明,指数选择能整体提高单株材积、心材率和木材基本密度综合的遗传增益,达到比单性状选择更好的选择效果,是多性状改良较理想的选择方法。Two clonal trial stands of Chinese Fir （Cunninghamia lanceolata） were used in this study, one was 19year old stand which included 38 clones, and the other was 17yearold stand including 102 clones. The statistical analyses showed that there were very significant genetic variations in height, DBH, volume and ratio of heartwood （Rh,） , wood basic density （Pb） of the clones in the two stands. The repeatability of clones was in median to high level, and the genetic CV was different over the all five traits. There were very significant phenotypic and genetic correlations among height, DBH and volume, and negative correlations among growth, Rhw and Pb＋ The selection method experiment indicated that index selection could improve volume, Rhw and Pb, showing synthetically superior selection effects compared to any individual trait selection methods.

关 键 词：杉木 无性系 材性 多性状指数选择 

分 类 号：S722.33[农业科学—林木遗传育种]