Metagenomics-based insights into the microbial community profiling and flavor development potentiality of baijiu Daqu and huangjiu wheat Qu

•P. pentosaceus, W. paramesenteroides, R. emersonii, B. spectabilis were dominant in Daqu.•Four Saccharopolyspora species were dominant in wheat Qu.•Flavor metabolic pathways in Qu microbiota were reconstructed.•The dominant microbes in Qu may not be the main functional microbes.