Haliński Łukasz P, Stepnowski Piotr
Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, Wita Stwosza 63, 80-308 Gdańsk, Poland.
Phytochemistry. 2016 Dec;132:57-67. doi: 10.1016/j.phytochem.2016.09.011. Epub 2016 Oct 4.
The tomato (Solanum lycopersicum L.) is one of the most important vegetables worldwide. Due to the limited genetic variability, wild related species are considered as potential gene pool for breeding cultivated plants with enriched genetic basis. Taxonomic relations between tomato species at the level of single groups and taxa still remain, however, not fully resolved. Hence, in addition to already reported classification based on the morphology of the plants and molecular markers, we proposed chemotaxonomic approach to unveil some aspects of tomato taxonomy. Cuticular hydrocarbons and surface sucrose esters (SEs) were used as chemotaxonomic markers. Classification based on the cuticular hydrocarbon profile was in good agreement with other taxonomic studies as long as between-species differences were taken into account. Clear separation of the common tomato and closely related species from the majority of S. pennellii accessions was obtained. In the same time, however, S. pennellii revealed broad variation: based on the results, three highly distinct types of these plants were proposed, among them one type was very similar to cultivated tomato and its relatives. Addition of SEs profiles to the dataset did not impair the classification, but clarified the position of S. pennellii. The results suggest possible hybrid origin of some of S. pennellii and wild S. lycopersicum accessions, and the approach proposed has a potential to identify such hybrid plant lines.
番茄（Solanum lycopersicum L.）是全球最重要的蔬菜之一。由于遗传变异性有限，野生近缘物种被视为培育具有丰富遗传基础的栽培植物的潜在基因库。然而，番茄物种在单个类群和分类单元水平上的分类关系仍未完全解决。因此，除了已经报道的基于植物形态和分子标记的分类外，我们提出了化学分类学方法来揭示番茄分类学的一些方面。表皮碳氢化合物和表面蔗糖酯（SEs）被用作化学分类学标记。只要考虑物种间差异，基于表皮碳氢化合物谱的分类与其他分类学研究结果高度一致。普通番茄和与其亲缘关系密切的物种与大多数潘那利番茄种质得到了清晰区分。然而，与此同时，潘那利番茄表现出广泛的变异性：基于这些结果，提出了三种高度不同类型的此类植物，其中一种类型与栽培番茄及其亲缘种非常相似。将SEs谱添加到数据集中并未影响分类，但明确了潘那利番茄的位置。结果表明一些潘那利番茄和野生番茄种质可能具有杂交起源，并且所提出的方法有潜力识别此类杂交植株系。
