Genetic, morphological, and chemical discrepancies between Camellia sinensis (L.) O. Kuntze and its close relatives
文献类型： 外文期刊
第一作者： Jin, Ji-Qiang
作者： Jin, Ji-Qiang;Dai, Wei-Dong;Zhang, Chen-Yu;Lin, Zhi;Chen, Liang
作者机构：
关键词： Flavonol trisaccharide glycosides; Metabolite signatures; Morphological traits; Population genetic; Tea plant; Tetragalloyled hydrolyzable tannins
期刊名称：JOURNAL OF FOOD COMPOSITION AND ANALYSIS （ 影响因子：4.52； 五年影响因子：4.942 ）
ISSN： 0889-1575
年卷期： 2022 年 108 卷
页码：
收录情况： SCI
摘要： Identifying the discrepancies between cultivated tea and its wild relatives, especially in terms of their chemical compositions, is important in exploitation of specific germplasms. This study systematically investigated the phylogenetic relationships, morphological traits, and metabolite profiles of 27 typical tea accessions. Results showed that 84,797 high-quality single nucleotide polymorphisms classified the sampled tea accessions into two groups, namely, Camellia sinensis (L.) O. Kuntze (CS) and its close relatives (CR), most of which were supported by morphological evidence. Targeted metabolomic analyses absolutely quantified 51 characteristic metabolites. Among these metabolites, two tetragalloyled hydrolyzable tannins and four flavonol trisaccharide glycosides accumulated in low amounts in CS and CR, respectively. Furthermore, the notable discrepancy in chemical composition was validated by the metabolite profiles of 114 tea accessions. Overall, this study showed the diversification of Sect. Thea plants regarding the genetic, morphological, and chemical characteristics, leading to a better understanding of wild tea plants.
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