Polyphenol oxidase (PPO) activit and yellow pigment content are the importantcolor traits affecting the apparence of wheat-based products in wheat kernels.Polyphenol oxidase (PPO) is a major cause of time-dependent darkening anddiscoloration in Asian noodles and other wheat-based products. The highly yellowpigment content(YPC) will not only result in the flour yellowness increased, but alsoreduces the whiteness of the flour. They are both the main factors leading to the flourcolor and luster are not be fond...