【摘要】 该研究对高温大曲（DQ）及3种麸曲（细菌曲（FQB）、酵母曲（FQY）、霉菌曲（FQM））的理化指标、微生物菌群组成和潜在功能进行对比分析。结果表明，3种麸曲的水分、液化力和糖化力均高于高温大曲，酸度则相反。高温大曲中的细菌和真菌菌群多样性均高于麸曲。高温大曲中微生物菌群比较丰富，相对丰度较高的菌属为克罗彭斯特菌属（Kroppenstedtia）(26.5%)、枝芽孢杆菌属（Virgibacillus）(23.7%)、曲霉属（Aspergillus）(37.2%)、嗜热真菌属（Thermomyces）(25.5%)；细菌曲中细菌属以芽孢杆菌属（Bacillus）(99%)为主；霉菌曲和酵母曲中真菌属分别以曲霉属（96.2%）和异常维克汉姆酵母属（Wickerhamomyces）(97.7%)为主。功能预测结果表明，与麸曲相比，高温大曲的真菌和细菌群落在淀粉和蔗糖代谢、丙酮酸代谢和三羧酸循环代谢更旺盛。更多还原

【Abstract】 The physicochemical indexes, microbial communities and potential functions of high-temperature Daqu(DQ) and three types of Fuqu(bacterial Qu(FQB), yeast Qu(FQY), mold Qu(FQM)) were compared and analyzed. The results showed that the moisture, liquefying and saccharifying power of three types of Fuqu were higher than those of high-temperature Daqu, while the acidity was reversed. The diversity of bacteria and fungi in high-temperature Daqu was higher than that in Fuqu. The microbial organisms in high-temperature Daqu were abundant, and the relative abundance of Kroppenstedtia(26.5%), Virgibacillus(23.7%), Aspergillus(37.2%) and Thermomyces(25.5%) was high. Bacillus(99%) was the dominant bacterial genera in bacterial Qu. Aspergillus(96.2%) and Wickerhamomyces(97.7%) were the dominant fungal genera in mold Qu and yeast Qu, respectively.The results of function prediction showed that, compared with Fuqu, the metabolism of starch and sucrose, pyruvate and tricarboxylic acid was more vigorous in the fungal and bacterial communities of high-temperature Daqu.更多还原