摘要
对１９８４年在８ 个试点营建的９～１１ 年生火炬松种源林的调查分析，结果表明，主要经济性状存在着显著的种源差异，且具较高遗传力（其中４ 个试点的材积和干材干质量、树干通直度、木材基本密度达到５％ 差异显著水平，遗传力为０．４５～０．７８、０．４５～０．７６、０．５５～０．８３、０．４３～０．７７）。各类性状在种源区间表现出不同的变异趋势。利用其中４ 个点１９ 个共同种源的资料分析，表明各类性状的地点效应极显著，树高、材积、干材干质量的种源×地点作用显著，种源间对环境的适应性和反应亦不同。生长与产量性状间呈现极密切的正相关，但与材性、材质性状的相关性各试验点表现略有差异。采用材积和木材基本密度构建基本选择指数，分别为各引种区评定出培育建筑材工业林适宜的种源区和３ 个优良种源，其中最优种源的指数增益达到４．６５％ ～２３．４９％ 。
According to the analysis results on the provenance tests of loblolly pine established in 1984 at 6 sites,there are significant inter provenance differences and higher heritabilities for the main economic traits,the selection potentials are larger.For stem volume,biomass,straightness and wood basic density,the differences are above 5% significant level at 4 sites,and the heritabilities are 0.45～0.78,0.45～0.76,0.55～0.83,0.43～0.77,respectively.These traits show different variation trends between provenance area of Wells′.All traits show marked inter site difference,the provenance×location effects of tree height,volume,stem wood,biomass are significant,so that the selection of provenance would be based on its suitable region and site.The positive correlation between growth traits and the negative correlation of growth traits with stem form and wood basic density are notable.Using preliminary index selection method with wood volume and basic density as the constitution traits,the suitable provenance areas and superior provenance are determined for each planting area with the aim of building timber plantation cultivation,the index gain of the best provenance is 4.65%～23.49%.
出处
《林业科学研究》
CSCD
北大核心
1999年第5期485-492,共8页
Forest Research
基金
"八五"国家科技攻关专题
关键词
火炬松
种源(区)
遗传变异
综合选择
loblolly pine
provenance (area)
genetic variation
comprehensive selection
