Analysis of fungi community diversity and structure in different high-temperature Daqu

In this study, the fungal diversity and community structure of different high-temperature Daqu (yellow Qu, black Qu, white Qu, mixed Qu) were analyzed by high-throughput sequencing technology, the fungal community were analyzed by cluster analysis (CA) and principal coordinate analysis (PCoA) based on the genus level, and the phylogenetic analysis of the fungal community was conducted.The results shown that the richness of fungal community in yellow Qu was the highest, the unique amplicon sequence variants (ASVs) was 790.Ascomycota was the dominant phyla in yellow Qu, and Thermomyces, Thermoascus, Aspergillus, and Monascus, etc were the dominant genera.CA and PCoA results showed that on the genus level, the similarity of fungal community structure between yellow Qu and black Qu was higher.Phylogenetic analysis of fungal flora showed that the relative abundance of Aspergillus in yellow Qu was higher than that in other high-temperature Daqu.The study provided a theoretical basis for improving Jiuqu by microbial technology and improving the quality and flavor of sauce-flavor (Nongxiangxing) Baijiu.