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Evaluation and selection analyses of 60 Larix kaempferi clones in four provenances based on growth traits and wood properties

机译:基于生长性状和木材性状的四个种源落叶松60个无性系的评估和选择分析

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摘要

To evaluate and select elite Larix kaempferi materials, three growth traits and six wood properties of 60 L. kaempferi clones from four provenances were analyzed. The ANOVA results indicated significant differences (p < 0.01) in all the investigated characteristics (height, diameter at breast height, volume, hemicellulose content, cellulose content and lignin content) among clones within provenances. The phenotypic and genotypic coefficients of variation among clones ranged from 6.65% to 25.66% and from 3.42% to 22.27%, respectively. The clone repeatability of all traits ranged from 0.51 to 0.97. The phenotypic and genetic correlation coefficients between different traits ranged from -0.66 to 0.98 and - 0.90 to 0.98, respectively. Principal component analysis showed that the first two components explained 54.29% of the total variance, and growth traits and some wood properties showed higher absolute values. Under a selection rate of 10%, using the method of comprehensively evaluating multiple traits to select clones, six elite clones were selected based on their growth traits, wood properties, and both growth traits and wood properties together. For these groups of clones, the genetic gains ranged from 5.27 to 21.53%, 8.02 to 29.95%, and 4.27 to 18.07%, respectively. These selected clones could provide a base material for the selection of improved varieties.
机译:为了评估和选择优良的落叶松落叶松材料,分析了来自四个产地的60个落叶松属克隆的三个生长性状和六个木材特性。方差分析结果表明出处之间无性系之间所有调查的特征(高度,胸径,体积,半纤维素含量,纤维素含量和木质素含量)均存在显着差异(p <0.01)。克隆之间的表型和基因型变异系数分别为6.65%至25.66%和3.42%至22.27%。所有性状的克隆重复性介于0.51至0.97之间。不同性状之间的表型和遗传相关系数分别为-0.66至0.98和-0.90至0.98。主成分分析表明,前两个成分占总方差的54.29%,生长性状和某些木材特性显示出较高的绝对值。以10%的选择率,使用综合评价多个性状的方法选择无性系,根据其生长性状,木材性状以及生长性状和木材性状一起选择了6个优良无性系。对于这些克隆组,遗传增益分别为5.27%至21.53%,8.02%至29.95%和4.27%至18.07%。这些选择的克隆可为选择改良品种提供基础材料。

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