斑皮桉生长性状及木材材性遗传参数估算

摘要

Four C. citriodora clonal trials, located at Urunga, Coifs Harbour, Grafton and Casino on the north coast of New South Wales, were sampled to estimate genetic parameters for growth and non - destruc- tive wood properties. Both growth traits and wood properties were under strong genetic control, with broad- sense hefitabilities（H2） ranging from 0.46 to 0.71 for diameter at breast height （DBH） over bark and total tree height（HT） ,0.52 to 0.77 for pilodyn value and 0.64 to 0.85 for FAKOPP value. Pilodyn and FAKOPP were positively correlated, whilst neither of them had significant relationship with DBH. Site effects on growth and wood quality were significant. Little genotype by environment interactions （GEl） was observed. By compari- son, the relatively lower correlations for DBH meant small GEl occurred.%分别以位于澳大利亚新南威尔士州北部沿海地区Urunga、Coffs Harbour、Grafton和Casino的4个斑皮桉无性系试验作为研究对象,测定其林木生长性状和木材材性并进行遗传参数估算。研究表明,林木生长性状和木材材性均受到较高的遗传控制,胸径和树高的广义遗传力（H2）在0.46~0.71之间,Pilodyn值的广义遗传力在0.52~0.77之间,FAKOPP值的广义遗传力在0.64~0.85之间;Pilodyn值与FAKOPP值呈显著的正相关关系,但二者与胸径均无显著相关性;环境因子对生长性状和木材材性的影响显著;遗传与环境交互作用对木材材性影响不显著,但对生长性状如胸径有一定影响。