HE Yangyifan, MA Pan, ZOU Wenhui, LI Chaosu, ZHANG Zhenggang, LIU Zehou, TANG Hao, WANG Qin, YANG Ning, LI Yang, LI Jun, YANG Wuyun, ZHANG Lianquan, WAN Hongshen
A total of 20 wheat varieties (Yangmai 30, Yangmai 36, Yangmai 45, Kenmai 58, Chumai 47, Quanmai 725, Quanmai 838, Wanke 421, Mianmai 907, Mianmai 916, Mianmai 902, Xikemai 8, Xikemai 546, Xikemai 475, Qianmai 18, Qianmai 19, Qianmai 20, Qianmai 21, Qianmai 22, Chuanmai 98) from the 3 major weak gluten wheat main producing areas, which have potential characteristics suitable for Daqu making were collected, their quality characteristics and the properties of the medium-high temperature Daqu were analyzed, and the correlation between the wheat quality indexes and sensory quality of the medium-high temperature Daqu was investigated. The results showed that there were 2 varieties of weak gluten (hardness index < 50), 8 varieties of medium strong or strong gluten (hardness index ≥ 60), and 10 varieties of medium gluten (hardness index 50-60) among the 20 wheat varieties. The core temperature changes during the preparation of medium-high temperature Daqu using 20 varieties wheat were consistent with the fermentation characteristics of medium-high temperature Daqu culture. Except for Mianmai 916, the maximum core temperature of medium-high temperature Daqu prepared from the other 19 varieties wheat was above 50 ℃. The sensory scores of the Daqu made from 14 varieties wheat such as Xikemai 8, Mianmai 902, Yangmai 36, and Yangmai 30 reached the qualified level (sensory score ≥ 36). The results of the correlation between wheat quality indicators and the sensory quality of the prepared medium-high temperature Daqu indicated that the starch content, flouriness rate, and the maximum core temperature of Daqu prepared from corresponding wheat varieties determined the sensory indicators such as aroma, appearance, cross-section, and total score of the Daqu. Therefore, choosing wheat with higher starch content and flouriness rate was more conducive to the preparation of medium-high temperature Daqu.