漳平五一林场全国杉木优良家系区域试验

A Regional Experiment on the National Fine Families of Cunninghamia lanceolata

本研究对全国不同区域１２１个杉木优良家系９年生材积生长量进行统计分析表明：家系平均遗传力高，家系间生长差异极显著，家系遗传变异系数大，家系方差分量占总分量１３．２％；有７６个家系材积生长量超过我场初级种子园后代，６３个家系材积生长量超过洋口初级种子园后代，２０个家系材积生长量超过我省优良家系６４２１号，其材积增益比我场种子园后代大２５．４％─６５．６％。

The analyses show that the average genetic abil ity of the families is high，the growth difference is ex-tremely significant among the families and the volume gains of twenty families are 25．4─65． 60％ higher than thoseof the progenies in the seed orchard on Wuyi National Forest Farm.