日本落叶松遗传变异分析及优良家系无性系选择

Analysis of Genetic Variation and Selection of Superior Families and Clones of Larix kaempferi

为探索日本落叶松遗传变异规律及选择优良家系无性系,以内蒙古自治区赤峰市旺业甸实验林场的59个日本落叶松无性系测定林和81个日本落叶松家系子代试验林为研究对象,测定其树高,对其进行方差分析和变异分析。结果表明,日本落叶松无性系和家系树高性状存在丰富的变异,变异系数范围分别为17.84%~20.67%和24.68%~31.19%。方差分析表明,每一年,无性系间和家系间均存在显著差异,重复力和遗传力范围分别为0.482~0.494和0.793~0.819,属于中等重复力和高遗传力。以20%的入选率为标准,最终选择出12个优良无性系和16个优良家系,无性系现实增益和家系现实增益范围分别为5.73%~16.48%和7.59%~15.35%。

In order to explore the genetic variation pattern of Larix kaempferi and to select superior family and clones,59 clones and 81 families of Larix kaempferi in Wangyedian Experimental Forestry Farm,Chifeng City,Inner Mongolia Autonomous Region,were taken as research objects,and their tree heights were measured,and their ANOVA and variance analysis were conducted.The results showed that there was abundant variation of tree height traits in Larix kaempferi clones and families,with coefficients of variation ranging from 17.84%-20.67%and 24.68%-31.19%,respectively.ANOVA showed the difference was highly significant between clones and families every year,with a range in 0.482-0.494 and 0.793-0.819 of repeatability and heritability,respectively,which were moderate repeatability and high heritability.Using a 20%entry rate,12 superior clones and 16 superior families were finally selected,with realistic gains of clones and realistic gains of families ranging were 5.73%to 16.48%and 7.59%to 15.35%,respectively.