Abstract:

In this paper, the activities of PPO in wheat were determined to reveal the variation of polyphenol oxidase (PPO) in 195 varieties of wheat and to evaluate and screen of the resistance of pre-harvest sprouting from 24 popular wheat varieties. The results indicated that significant variation was observed among PPO activities of wheat in China, ranging from 4.95 to 13.99 AU/(min?g) and the variation coefficient was 21.4%. There were great deviations of the PPO activities among studied wheat. It indicated that wheat genetic improvement has great potential. Finally, there were great deviations of the PPO activities among commercial wheat cultivars in China ,several resistance of pre-harvest sprouting wheat was selected, including ‘Zhongmai 9’, ‘Jing 9428’, ‘Jimai 38’, ‘Shan 229’, ‘Ningmai 9’ and ‘Chuanmai 47’.