Drought stress affects yield formation of sugar beet. Under climatic changes with longer periods of drought, the development of sugar beet varieties with a higher drought stress tolerance is gaining importance. Objectives of the study were to investigate genotypic differences in the response to different environments, especially drought stress, to define conditions in which sugar beet can best be selected for root yield and sugar content, and furthermore, to examine the relation between yield potential and yield stability. In 2018 and 2019, field trials were carried out with 6 genotypes at three drought-stressed sites, where an irrigation treatment allowed the comparison with optimal growth conditions, furthermore, trials with 3 N treatments were conducted. In the absence of diseases, no significantly different regression slopes of genotypes were observed for sugar yield in 17 environments. Hence, the trials provided no indication for a special adaptation of the genotypes to drought stress conditions. One reason might be a sink limitation of sugar beet growth. By contrast, a genotype by environment interaction existed for sugar content and root yield. The greatest genotypic discrimination to classify genotypes with either high root yield or sugar content was under optimal growing conditions. With increasing root yield, the sugar content declined similarly in all genotypes. For sugar yield, differences between the genotypes occurred in yield potential and yield stability. High yield potential was not necessarily associated with high yield stability. As it is important to achieve consistently high yields also with higher variability of climatic conditions, yield stability will increase in importance for future breeding.

干旱胁迫影响甜菜的产量形成。在气候变化和干旱持续时间较长的情况下，具有较高抗旱性的甜菜品种的开发正变得越来越重要。该研究的目的是调查对不同环境（特别是干旱胁迫）的反应的基因型差异，以定义最佳选择甜菜根产量和糖含量的条件，并研究产量潜力与产量之间的关系。稳定。在2018年和2019年，在三个干旱胁迫的地点进行了6种基因型的田间试验，在该试验中，灌溉处理可以与最佳生长条件进行比较，此外还进行了3 N种处理的试验。在没有疾病的情况下 在17个环境中，糖产量没有观察到基因型的回归斜率显着不同。因此，这些试验没有提供基因型适应干旱胁迫条件的迹象。一个原因可能是甜菜生长的下沉限制。相反，存在环境相互作用的基因型，其糖含量和根产量。分类具有高根产量或糖含量的基因型的最大基因型歧视是在最佳生长条件下。随着根产量的增加，所有基因型的糖含量均下降。对于糖产量，基因型之间的差异发生在产量潜力和产量稳定性上。高产量潜力不一定与高产量稳定性有关。