Polyphenol oxidize(PPO)and yellow pigment content are the main characterswhich have significant influences on the apparence of wheat-based products in wheatgrain. PPO caused unexpected colour in flour processing, and high yellow pigmentcontent caused flour yellowness increasing, making the flours lightness decreasing.They are the main reason why the flour colour is not welcomed by consumers. So itwill be more important to breed new cultivars which flour is more light by geneticsimprovement in the future qua...