Abstract
The bacterial community in mammalian gastrointestinal tract is abundant and complex. To date, little is known about the gut microbiota of wild boar. This study aimed to investigate the fecal bacterial diversity of wild boar and compare with commercial pig and domestic native pig. The diet composition showed that the diets of wild boar, commercial pig and domestic native pig were different from each other. More than 1,760,000 quality-filtered sequences were obtained, and the results revealed distinct compositions and diversity of fecal microbiota in three groups. PCoA and NMDS analyses showed that fecal bacterial communities of wild boar, commercial pig and domestic native pig formed distinctly different clusters. Although the three groups shared a large size of OTUs comprising a core microbiota community, a strong distinction existed at family and genus levels. Ruminococcaceae, Prevotellaceae and Christensenellaceae were more abundant in the feces of wild boar than in domestic native pig and commercial pig. At the genus level, the proportion of unidentified Christensenellaceae was remarkably higher in wild boar group, while commercial pig and domestic native pig group had a higher abundance of Streptococcus and Lactobacillus. Tax4Fun predictions of metagenome function showed statistically significant differences in the functions of fecal microbiota in three groups. There were more bacteria genes with amino acid metabolism, cell growth and death, cell motility, energy metabolism, immune system and environmental adaptation observed in wild boar feces, while commercial pig feces contained more bacteria genes with carbohydrate metabolism, drug resistance, aging, infectious diseases, lipid metabolism, endocrine and metabolic diseases. These results indicated that the fecal microbial ecosystem of the wild boar is significantly different from that of domestic native pig and commercial pig, suggesting that diet is an important factor leading to differences in bacterial abundance and diversity in feces.
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Acknowledgements
This work was supported by National Natural Science Foundation of China (NSFC, Project No. 31560449 and N0.31760457), the National Key Research and Development Program of China (2017YFD0400503-3) and the State Key Laboratory of Food Science and Technology Nanchang University (Project No. SKLF-ZZA-201610).
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Huang, J., Zhang, W., Fan, R. et al. Composition and functional diversity of fecal bacterial community of wild boar, commercial pig and domestic native pig as revealed by 16S rRNA gene sequencing. Arch Microbiol 202, 843–857 (2020). https://doi.org/10.1007/s00203-019-01787-w
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DOI: https://doi.org/10.1007/s00203-019-01787-w