In this study, MiSeq high-throughput sequencing was used to analyze the bacterial community structure of the sour porridge from Hequ and Wuyuan regions and to explore the correlation between the dominant bacterial genera and predict the bacterial gene functions. Results showed that the abundance and diversity of bacteria were significantly higher in Wuyuan sour porridge than that in Hequ sour porridge. All sour porridge samples contained two dominant bacterial phyla, Firmicutes (75.85%) and Proteobacteria (23.31%), and 12 dominant bacterial genera, Lactobacillus (41.95%), Acetobacter (14.10%), Bacillus (6.72%), Clostridium (6.69%), and Pediococcus (5.36%), etc., with a cumulative relative content of 59.19% of lactic acid bacteria. There were significant differences in the contents of Acetobacter and Weissella in the two regional sour porridge samples. The correlation analysis showed that, except for the significant negative correlation between Lactobacillus and Enterococcus, the positive correlation between Clostridium and Weissella, Lactococcus with Acetobacter and Enterococcus, also, Aeromonas and Enterococcus was significant (P<0.01). The gene function prediction results showed higher expression of bacterial gene functions in replication, recombination and repair, amino acid transport and metabolism and translation, ribosomal structure, and biogenesis in the two regions of sour porridge, with significant differences (P<0.01) in replication, recombination and repair ,and translation, ribosomal structure and biogenesis functions, and all of them were higher in the expression of Wuyuan sour porridge bacterial flora than that of Hequ sour porridge. Thus, there were some differences in the bacterial taxa and structure of Hequ and Wuyuan sour porridge.
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