The nutritional value of a crop lies not only in its protein, lipid, and sugar content but also involves compounds such as the antioxidants lycopene, β-carotene and vitamin C. In the present study, wild tomato Solanum pimpinellifolium LA 1589 was assessed for its potential to improve antioxidant content. This wild species was found to be a good source of alleles for increasing β-carotene, lycopene, vitamin C and vitamin E contents in cultivated tomato. Characterization of an LA 1589 interspecific inbred backcross line (IBL) mapping population revealed many individuals with transgressive segregation for the antioxidants confirming the usefulness of this wild species for breeding of these traits. Molecular markers were used to identify QTLs for the metabolites in the IBL population. In total, 64 QTLs were identified for the antioxidants and their locations were compared to the map positions of previously identified QTLs for confirmation. Four (57 %) of the carotenoid QTLs, four (36 %) of the vitamin QTLs, and 11 (25 %) of the phenolic acid QTLs were supported by previous studies. Furthermore, several potential candidate genes were identified for vitamins C and E and phenolic acids loci. These candidate genes might be used as markers in breeding programs to increase tomato's antioxidant content.

中文翻译：

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番茄果实中抗氧化分子的定量性状位点图谱：类胡萝卜素、维生素 C 和 E、谷胱甘肽和酚酸

作物的营养价值不仅在于其蛋白质、脂质和糖含量，还包括抗氧化剂番茄红素、β-胡萝卜素和维生素 C 等化合物。 在本研究中，对野生番茄 Solanum pimpinellifolium LA 1589 进行了评估提高抗氧化剂含量的潜力。发现这种野生物种是增加栽培番茄中 β-胡萝卜素、番茄红素、维生素 C 和维生素 E 含量的等位基因的良好来源。LA 1589 种间近交回交系 (IBL) 作图种群的表征揭示了许多个体具有抗氧化剂的海侵分离，证实了这种野生物种在培育这些性状方面的有用性。分子标记用于鉴定 IBL 群体中代谢物的 QTL。总共，为抗氧化剂鉴定了 64 个 QTL，并将它们的位置与先前鉴定的 QTL 的图谱位置进行比较以进行确认。之前的研究支持了四个 (57%) 的类胡萝卜素 QTL、四个 (36%) 的维生素 QTL 和 11 个 (25%) 的酚酸 QTL。此外，还鉴定了维生素 C 和 E 以及酚酸基因座的几个潜在候选基因。这些候选基因可用作育种计划中的标记，以增加番茄的抗氧化剂含量。