PWC5 in purple waxy corn had the highest total anthocyanin content at milking stage (63.4 ± 1.7lg C3G/g) and physioligical maturity stage (62.7 ± 1.7lg C3G/g),where as PWC2 and PWC1 had the highest total anthocyanin contents of 59.9 ± 1.9 and 53.2 ± 1.5lg C3G/g, respectively, at the milky stage