Expression patterns of anthocyanin biosynthetic genes in the skin and flesh of Yan 73 and Muscat Hamburg cultivars across five developmental stages. The data are derived from qPCR analysis and are normalized to VvUbiquitin. The transcriptional levels of the same gene in the skin and flesh tissues of Yan 73 and Muscat Hamburg are expressed on the y axes with the same scale, and relatively lower values are magnified in inset graphs with y axes with narrower scales. Berry developmental stage is referred to on the x axis. DAA, days after anthesis; 61 DAA (63 DAA) pre-véraison; 74 DAA (76 DAA), 50% véraison green; 82 DAA (90 DAA), 50% véraison red; 92 DAA (105 DAA), 100% véraison; 101 DAA (112 DAA) , harvest. Error bars illustrate the standard errors for three replicates.