Methods of adaptability and stability applied to eucalyptus breeding

Abstract: The objective of this work was to evaluate the consistency of the methods of Annicchiarico, Lin & Binns, Wricke, and factor analysis in identifying eucalyptus clones with stability, adaptability, and high productive potential. Eight-four clones, with three years of age, from the genetic breeding program of the company CMPC Celulose Riograndense were used. Three field experiments were carried out in a randomized complete block design, in an 84x3 factorial arragement, with 20 replicates of one plant per plot. The clones were evaluated as to diameter at breast height, plant height, and volume of wood. The methods of Annicchiarico and Lin & Binns are highly correlated with each other, and their use together with the method of Wricke is a sound strategy for the evaluation of eucalyptus clones. The factor analysis identified broadly adaptable clones, and some of them were the same ones identified by the methods of Annicchiarico and Lin & Binns. The use of the mean classification of the clones, along with the factor analysis, is efficient to identify the most adapted, stable, and productive ones among a high number of genotypes.

摘要：本研究旨在评估Annicchiarico法（Annicchiarico）、Lin & Binns法（Lin & Binns）、Wricke法（Wricke）以及因子分析法（factor analysis）在鉴定具备稳定性、适应性与高生产潜力的桉树无性系方面的一致性。本研究使用了来自CMPC Celulose Riograndense公司遗传育种项目的84个3年生桉树无性系。共设置3个完全随机区组设计的田间试验，采用84×3析因排列方案，每个小区定植1株植株，设置20次重复。对供试无性系的胸径、树高及木材材积性状进行了测定。研究结果表明，Annicchiarico法与Lin & Binns法之间相关性极强，将二者与Wricke法结合使用，是评估桉树无性系的可靠策略。因子分析法可鉴定出广适应性无性系，其中部分无性系与Annicchiarico法及Lin & Binns法所筛选出的材料一致。结合无性系平均分类结果与因子分析法，可高效从大量基因型中筛选出适应性强、稳定性佳且生产性能优异的材料。