Based on the determination of the physicochemical indicators of light-flavor Daqu (LFD) from Baishui regions in Shaanxi province, this study further used MiSeq high-throughput sequencing technology to analyze its fungal community and explore the correlation between fungal community and physicochemical indicators.The results of physicochemical indicators detection showed that there were significant differences in the indexes such as alcohol fermentation power, fermentation power, liquefaction power, and saccharification power among different samples of LFD (coefficients of variation>15%), and the acidity was low (0.52~0.76 mmol/10 g).The sequencing results showed that the dominant fungal communities were primarily Monascus (37.37%), Thermoascus (25.57%), and Rhizopus (21.70%).The correlation analysis revealed a significant positive relationship between Rhizopus and saccharification ability as well as fermentation ability (P<0.05).On the other hand, both Xeromyces and Lichtheimia exhibited a significant negative correlation with amino acid nitrogen (P<0.05).Additionally, in this study, the fungal sequences of the LFD from Xiangyang region in Hubei province were downloaded from the MG-RAST database, and a comparative analysis of the fungal community structure between Xiangyang and Baishui regions was conducted.Results showed that the fungal diversity of LFD from Baishui was significantly higher than that of Xiangyang, and the characteristic microorganisms in Baishui were mainly Rhizomucor and Lichtheimia, while in Xiangyang, they were mainly Monascus.At the same time, both LFD in the two regions contained core fungal groups such as Thermoascus, Saccharomycopsis, Candida, and Aspergillus.Pure cultivation results showed that the cultivable yeast in LFD from Baishui was mainly Saccharomycopsis fibuligera.Therefore, it can be seen that there are certain differences in the physicochemical indicators such as saccharification power, fermentation power, and brewing performance of the LFD from the Baishui region.The dominant fungi are mainly Monascus, Thermoascus, and Rhizopus, and there is a certain correlation between the dominant fungal community and some of the physicochemical indicaotrs.
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