马尾松自由授粉家系生长和材质的遗传分析及联合选择*

对９年生８１年自由授粉家系的研究发现，马尾松高，径生长，树干通直度，分枝性状和木材基本密度在家系间差异显著，具有适度的遗传力，而未发现管胞长度显著的家系效应，由于高、径生长和基本密度呈微弱的正相关至微弱的负相关，进行生长迅速家系的选择并不会至致使幼龄材材性的变劣，利用通直度和分枝习性等指标可以对高，径生长和木材密度进行间接选择，分枝角可能是一个独特的指标，它独立于其它多数性状。借助于约束或无约束选

Genetic Analysis and Combined Selection for Growth and Wood Quality of Open-pollinated Families of Masson Pine

Inheritance and variation of growth and wood quality were studied through 81open-pollinated families of 9-year-old.It was found that there were significant differencesbetween families for tree height,DBH,bole straightness,limb characteristics and wood basicdensity which were moderately inherited,and while marked effect of family for tracheidlength was not found.The poor posiive or negative genetic correlation between growth andbasic density indicated that growth rate is not an accurate indicator for wood density. Thegrowth and wood density could be manipulated indirectly by selecting bole straightness andbranch size. Branch angle was a specific trait independent of other ones. Unrestricted and re-stricted index were effective methods for selecting fast-growing and high wood quality fami-lies. Finally,the problems on selection strategy and multi-trait selection of paper-pulp woodwere discussed.