Genetic control and location of QTLs associated with phytochemical compounds and fruit quality in peach [Prunus persica (L.) Batsch] were evaluated using an F₂ mapping population (ZC²) derived from cross between ‘Zin Dai’ × ‘Crimson Lady’. Antioxidant capacity, accumulation of phenolic compounds (total phenolics, flavonoids, and anthocyanins), and fruit quality traits (fruit diameter, fruit weight, fruit firmness, soluble solids concentration, titratable acidity, and ripening index) were evaluated for 2 years (2013–2014). Fourteen QTLs for phytochemical and fruit quality traits were identified in 5 LGs, with two QTL clusters (qPC.ZC_5.1_2014 and qPC.ZC_7.1) observed on LGs 5 and 7. The QTL cluster qPC.ZC_5.1_2014 was associated with antioxidant capacity, flavonoids, anthocyanin content, and SSC, while qPC.ZC_7.1 exhibited association only with flavonoids and fruit ripening index. QTL clusters associated with different fruit quality traits were observed on LGs 1 and 6. Candidate gene analyses of the QTL cluster on LG5 (qPC.ZC_5.1_2014) revealed 14 candidate genes in peach with functional annotation related to biosynthesis pathway of phytochemical compounds.

桃子[ Prunus persica（L.）Batsch]中与植物化学化合物和果实品质相关的QTL的遗传控制和定位，使用源自“ Zin Dai”ד Crimson Lady”之间杂交的F ₂作图种群（ZC ²）进行评估。评估了2年（2013年– 2014）。在5个LG中鉴定了14个植物化学和水果品质性状的QTL ，在LG 5和7上观察到两个QTL簇（qPC.ZC_5.1_2014和qPC.ZC_7.1）。qPC.ZC_5.1_2014与抗氧化能力，类黄酮，花色苷含量和SSC相关，而qPC.ZC_7.1仅与类黄酮和果实成熟指数相关。在LGs 1和6上观察到与不同果实品质性状相关的QTL簇。对LG5上QTL簇的候选基因分析（qPC.ZC_5.1_2014）揭示了桃子中的14个候选基因，其功能注释与植物化学化合物的生物合成途径有关。