尾叶桉第1代与第2代群体间生长性状和木材材性的遗传控制对比研究

利用4个尾叶桉（Eucalyptus urophylla）自由授粉子代试验（其中D46、D54 2个试验为第1代子代试验,D135、SE35 2个试验为第2代子代试验）作为研究对象,对其生长性状和木材材性进行遗传参数估算.研究结果表明,生长性状和树皮性状受到较低的遗传控制,其狭义遗传力(h2):胸径(DBH) 0.0...

A Comparative Study on Genetic Control of Growth Traits and Wood Properties between First and Second Generation of Eucalyptus urophylla

Genetic parameters on growth traits and wood properties were estimated using data from four E.urophylla open-pollinated progeny trials which included two 1st generation(D46 and D54) and two 2nd generation(D135 and SE35).The study showed that the genetic control for growth and bark traits was low,with narrow-sense heritability(h2) ranging from 0.08 to 0.32 for DBH,0.05 to 0.38 for HT,0.10 to 0.33 for individual tree volume(VOL) and 0.27 to 0.32 for bark percentage(BarkP).Genetic control for Pilodyn penetration was strong,and the narrow-sense heritability(h2) ranged from 0.35 to 0.65.In the experiment D135,wood basic density(BD) and the narrow-sense heritability(h2) of FAKOPP were also generally high(0.53 and 0.41 respectively).Narrow-sense heritability(h2) of growth traits and Pilodyn penetration decreased from 1st to 2nd generation.Wood basic density was strongly negatively correlated with Pilodyn penetration and FAKOPP,but showed no significant correlations with growth traits.There was no significant effect of genetic and environment interaction(GEI) on wood properties,while there was some effects of GEI on DBH.Genetic correlations between generations for pilodyn penetration were positively strong,while those for DBH were significantly lower.