Abstract
Daqu is of great significance to the brewing process of Baijiu, and there are variations in the light-flavor Baijiu Daqu in different regions. However, few studies have been conducted on light-flavor Daqu from the north and south regions of China. In this study, the physicochemical indices, volatile flavor components, and microbial community structure of two types of Daqu from the north and south regions of China were comparatively analyzed. The study findings reveal that Daqu originating from the southern region of China (HB) exhibits superior moisture content, acidity, starch content, and saccharification power. In contrast, Daqu from the northern region of China (SX) displays higher fermentation, esterification, and liquefaction power. The analysis of the microbial community structure revealed that HB was dominated by Bacillus, Kroppenstedtia, Saccharomycopsis, and Thermoascus, while SX was dominated by Bacillus, Prevotella, and Saccharomycopsis. The analysis detected a total of 47 volatile components in both HB Daqu and SX Daqu. The volatile components of pyrazine were significantly more abundant in HB Daqu than in SX Daqu, while alcohol compounds were more prominent in SX Daqu than in HB Daqu. In addition, the RDA analysis established a correlation between dominant microorganisms and volatile components. Cyanobacteria, Fusobacteriota, Ascomycota, Blastocladiomycota, Basidiomycota, and Mucormyce exhibited positive correlations with a significant proportion of the key volatile compounds. This study establishes a scientific foundation for improving the quality of light-flavor Daqu liquor in different regions of China.
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Data Availability
The data that support the findings of this study are available from the corresponding author, [Shangling Fang], upon reasonable request.
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Acknowledgements
This work was supported by"13th Five-Year Plan” National Key R&D Program Key Special Project (2016YFD0400500).
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FYM, SLF, and QY conceived and designed the research. FYM performed the experiments and all authors analyzed data. QY, and FYM wrote the article with input from the other authors. All authors have read and approved the manuscript.
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Yu, Q., Mou, F., Xiao, J. et al. Correlational analysis of physicochemical indexes, microbial communities, and volatile components in light-flavor Daqu from north and south regions of China. World J Microbiol Biotechnol 40, 54 (2024). https://doi.org/10.1007/s11274-023-03865-0
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DOI: https://doi.org/10.1007/s11274-023-03865-0