Brazil is internationally recognized for the high yield of its Eucalyptus plantation forests and the use of wood as bioenergy. The expansion of Eucalyptus forests to water-limited regions in Brazil and around the world has required the selection of superior drought-adapted clones, since this is a limiting factor for the wood yield of Eucalyptus plantations. In addition to growth, the wood quality for bioenergy must be considered when selecting these Eucalyptus genotypes growing under seasonal drought-stress. Our study focused on evaluating the energy potential based on wood energy yield from a diverse set of 20 Eucalyptus multispecies clones planted under seasonal drought-stress in Brazil. In addition, correlation and path analyses were used to indicate which wood quality and yield traits influenced energy yield the most. The experiment area is characterized as tropical with dry winter climate type (Aw), with precipitation irregularly distributed throughout the year, with 5 months of water deficit. The mean annual increment (MAI) was calculated, trees were cut and wood samples were obtained six years after installing the experiment to determine the wood basic density, higher heating value, energy density, dry matter, and energy yield. Our results indicate that there are Eucalyptus genotypes adapted to seasonal drought-stress and present a high yield. The CCL36 (E. urophylla x E. grandis) clone has the greatest energy potential as it has the largest wood energy yield (982,587 MJ ha⁻¹ year⁻¹), and is also the most productive with 94.99 m³ ha⁻¹ year⁻¹ of wood. The wood energy yield of the Eucalyptus clones is strongly related to the mean annual increment and the increment in dry matter. However, wood traits such as basic density and heating value had little influence on wood energy yield. Thus, it is concluded that there are clones with high productive potential which can increase the biomass supply for energy in tropical regions with dry winter climate types, such as areas of recent forest expansion.

巴西因其桉树人工林的高产量和使用木材作为生物能源而享誉国际。将桉树林扩展到巴西和世界各地的缺水地区需要选择优良的抗旱无性系，因为这是桉树人工林木材产量的限制因素。除了生长之外，在选择这些在季节性干旱胁迫下生长的桉树基因型时，还必须考虑用于生物能源的木材质量。我们的研究重点是评估基于 20 种桉树的木材能源产量的能源潜力在巴西季节性干旱胁迫下种植的多物种克隆。此外，相关性和路径分析用于表明哪些木材质量和产量性状对能量产量影响最大。试验区属热带干燥冬季气候类型（Aw），全年降水分布不规则，缺水5个月。计算平均年增量（MAI），在安装实验六年后砍伐树木并获取木材样品，以确定木材的基本密度、较高的热值、能量密度、干物质和能量产量。我们的结果表明，桉树基因型适应季节性干旱胁迫并呈现高产。CCL36 ( E. urophylla x E. grandis) 克隆具有最大的能源潜力，因为它具有最大的木材能量产量 (982,587 MJ ha ^-1年^-1 )，并且也是最高产的，木材的产量为 94.99 立方米 ha ^-1年^-1。桉树无性系的木材能量产量与年均增量和干物质增量密切相关。然而，木材的基本密度和热值等木材性状对木材的能量产量影响不大。因此，得出的结论是，在冬季气候干燥的热带地区，例如最近森林扩张的地区，存在具有高生产潜力的克隆可以增加能源的生物质供应。