蒙古栎无性系间生长量变异分析

Analysis on Growth Variation among Different Quercus mongolica Clones

以吉林省临江林业局阔叶树种子园内22个系号相同的蒙古栎无性系为材料,对其树高、胸径和冠幅进行调查分析。结果表明:树高、胸径和冠幅无性系间均达到极显著差异(F值分别为10.44**、20.42**、10.05**)。树高、冠幅和胸径间呈极显著正相关关系,其中胸径与树高的相关系数最大,达到0.784。利用综合评价法,以10%的入选率选出优良无性系21号和15号,入选的2个无性系树高、胸径和冠幅平均值的遗传增益分别为10.63%、17.03%、3.67%,可将其作为速生优良无性系进行推广。

The tree height,DBH and crown width of 22 Quercus mongolica clones in the seed orchard of broad-leaved trees of Linjiang Forestry Bureau in Jilin Province were investigated and analyzed.The results showed that tree height,DBH and crown width were significantly different among clones(the values of F were 10.44**,20.42**and 10.05**,respectively).The tree height,crown width and DBH were significantly positively correlated.The correlation coefficient between DBH and tree height was 0.784 that was the maximum.The superior clones(No.21 and No.15)were selected with selection rate of 10%by the comprehensive evaluation method.The genetic gains of average tree height,average DBH and average crown width of two superior clones were 10.63%,17.03%and 3.67%,respectively.They could be popularized as the fast-growing superior clones.