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Genotype x Environment interaction, stability, and adaptability in progenies of Eucalyptus urophylla S.T. BLAKE using the AMMI model
Silvae Genetica ( IF 1 ) Pub Date : 2018-07-05 , DOI: 10.2478/sg-2018-0007
S. Pupin 1 , P. H. M. Silva 2, 3, 4 , F. A. Piotto 4 , A. C. Miranda 5 , D. U. G. Zaruma 3 , A. M. Sebbenn 6 , M. L. T. Moraes 1
Affiliation  

Abstract One of the determinant factors in the success of breeding programs that aim to select genotypes for different geographical regions is understanding the interaction between genotypes and environments (GxE). The objectives of this study were to evaluate GxE interaction, stability, and adaptability, and determine the need for environmental stratification of open pollinated progenies of Eucalyptus urophylla. Five progeny tests were established in study areas with different environmental conditions in southeast and mid-west Brazil. We used a complete randomized block experimental design with 138 to 167 progenies, and variations in the numbers of replicates and plants per plot. The trait measured was diameter at breast height (DBH) at two years of age and the AMMI method was used to determine patterns of GxE interaction. Significant effects were detected for genotypes, environments, and for GxE interaction. The effect of environment was responsible for the greatest proportion of the phenotypic variation, followed by the effect of genotypes and GxE interaction. Some progenies with greater productivity and stability were identified, although stability is not associated with productivity. The stratification of the selection in three specific environments is necessary due to the occurrence of a complex GxE interaction.

中文翻译:

使用 AMMI 模型的 Eucalyptus urophylla ST BLAKE 后代的基因型 x 环境相互作用、稳定性和适应性

摘要 旨在为不同地理区域选择基因型的育种计划成功的决定因素之一是了解基因型与环境 (GxE) 之间的相互作用。本研究的目的是评估 GxE 的相互作用、稳定性和适应性,并确定对尾叶桉的开放授粉后代进行环境分层的必要性。在巴西东南部和中西部不同环境条件的研究区建立了五个后代试验。我们使用了一个完整的随机区组实验设计,其中包含 138 到 167 个后代,并且每个地块的重复和植物数量有所不同。测量的性状是两岁时的胸高直径 (DBH),并使用 AMMI 方法确定 GxE 相互作用的模式。检测到基因型、环境和 GxE 相互作用的显着影响。环境的影响是造成表型变异的最大比例的原因,其次是基因型和 GxE 相互作用的影响。一些具有更高生产力和稳定性的后代被鉴定出来,尽管稳定性与生产力无关。由于复杂的 GxE 相互作用的发生,在三个特定环境中的选择分层是必要的。
更新日期:2018-07-05
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