Pearson’s correlation analysis in grape berries during the five developmental stages in Urumqi and Turpan. (A) Gene expression and composition; (B) composition and color difference values; (C) composition and antioxidant quality; (D) composition. C, FA, EC, PB1, PB2, Dp, Cy, Pt, Pn, Mv, and AC stand for catechin, ferulic acid, epicatechin, procyanidin B1, procyanidin B2, delphinidin-3-O-glucoside, cyanidin-3-O-glucoside, petunidin-3-O-glucoside, peonidin-3-O-glucoside, mal-vidin-3-O-glucoside, and total anthocyanins, respectively. *, Significant at 5% probability levels; **, significant at 1% probability levels.