Occurrence of White Flesh Color and Refreshing Flavor Following Phytoene Synthase 2A Gene Variation in Loquat Fruit
文献类型： 外文期刊
作者： Su, Wenbing 1 ; Chen, Xiuping 1 ; Wei, Weilin 1 ; Kou, Yidan 1 ; Deng, Chaojun 1 ; Lin, Han 1 ; Chen, Yongping 1 ; Xu, Qizhi 1 ; Wu, Lulu 2 ; Zhu, Changqing 2 ; Tong, Zhihong 1 ; Xu, Changjie 2 ; Jiang, Jimou 1 ;
作者机构： 1.Fujian Acad Agr Sci, Fruit Res Inst, Fujian Breeding Engn Technol Ctr Longan & Loquat, Fuzhou 350013, Peoples R China
2.Zhejiang Univ, Zhejiang Key Lab Hort Crop Qual Improvement, State Agr Minist Lab Hort Plant Crop Growth & Dev, Zijingang Campus, Hangzhou 310058, Peoples R China
关键词：
loquat; white-fleshed cultivar;
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）
ISSN： 0021-8561
年卷期： 2025 年 73 卷 17 期
页码：
收录情况： SCI
摘要： Loquat fruits from the apple tribe of Rosaceae ripen from late spring to early summer, when most fresh fruits are out of season. Compared with the orange-fleshed varieties, the white-fleshed varieties are usually preferentially chosen by consumers for a more favorable flavor. Though the breeding of white-fleshed cultivars with large fruit size greatly promoted the development of loquat production, the mechanisms of how fruits with lighter pigments are generated and how fruit flavor changes following flesh color shifting remain to be elucidated. Pigment measurements indicated carotenoids as the dominant pigment underlying the change in flesh color changing. Genotyping and haplotyping of 807 loquat accessions revealed that the rise of PSY2A d -PSY2A d genotype blocks carotenoids accumulation and confers to white flesh color of loquat fruit. Analysis of widely targeted metabolomes on 18 representative cultivars identified 1420 metabolites, with 223 differentially accumulated metabolites between the two groups. Further metabolite comparison demonstrated that low levels of bitter or astringent compounds, such as flavonoids, lignans and coumarins, phenolic acids, nucleotides, alkaloids, and terpenoids, may confer to a refreshing flavor of white-fleshed fruits. Furthermore, 18 metabolic biomarkers were identified by machine learning to distinguish fruits with diverse flesh colors. This work gives insights into the understanding of how fruit color variation associated with flavor and also promotes white-fleshed loquat breeding by genus-wide genotyping.
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