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Article

Diet with a High Proportion of Rice Alters Profiles and Potential Function of Digesta-Associated Microbiota in the Ileum of Goats

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CAS Key Laboratory of Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Key Laboratory of Animal Nutrition & Physiology and Metabolism, Institute of Subtropical Agriculture, The Chinese Academy of Sciences, Changsha 410125, China
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Hunan Co-Innovation Center of Animal Production Safety, CICAPS, Changsha 410128, China
*
Author to whom correspondence should be addressed.
Animals 2020, 10(8), 1261; https://doi.org/10.3390/ani10081261
Received: 19 March 2020 / Revised: 9 June 2020 / Accepted: 16 July 2020 / Published: 24 July 2020
(This article belongs to the Special Issue Sheep Lactation, Nutrition and Reproduction)
Our study provided a detailed picture of the ileal microbiota related to a high-concentrate diet and showed that it could reduce the bacterial richness and diversity in the ileum of goats. A high-concentrate diet may inhibit the growth of intestinal bacterial communities. Ileal concentrations of total volatile fatty acids increased and pH decreased with a high-concentrate diet, which could increase the risk of poor health in growing goats. Such an understanding will be essential to predict variations in the gastrointestinal microbiota to enhance the productivity and welfare of ruminants through nutritional strategies, such as diet intervention.
Effects of a high proportion of concentrate in the diet on the ileal microbiota and metabolites in small ruminants are rarely reported. This study was designed to investigate the ileal microbiota and its relationship with host metabolic function in goats and aimed to elucidate the mechanisms involving in the ileal adaptation to a diet containing a high proportion of rice. Sixteen goats were equally divided into two groups and fed a diet with a normal concentrate proportion (NC, 55% concentrate) or a high-concentrate diet (HC, 90% concentrate). Results showed that the HC diet decreased bacterial diversity and elevated the abundance of five genera (Clostridium_sensu_stricto_1, Eubacterium_nodatum_group, Ruminococcus_gauvreauii_group, Eubacterium_coprostanoligenes_group and Ruminococcus 1), but reduced the number of Anaerotruncus. Microbial functional potentials indicated that the HC diet activated the pathways related to metabolism of carbohydrate, glycan, lipid and vitamins, but inhibited the pathways associated with cell motility and signal transduction. The activities of amylase and alkaline phosphatase were greater (p < 0.05) in the intestinal digesta of the HC-fed goats. However, there were no differences in the villus height, crypt depth and the ratio of villus height to crypt depth in the ileum between the two groups. These results indicate that the HC diet alters the bacterial community and pathways related to the metabolism of dietary nutrients and cell motility and signal transduction of bacteria in the ileum of goats. View Full-Text
Keywords: bacterial community; high-concentrate diet; goat; intestine; metabolites bacterial community; high-concentrate diet; goat; intestine; metabolites
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MDPI and ACS Style

Wang, K.; Ren, A.; Zheng, M.; Jiao, J.; Yan, Q.; Zhou, C.; Tan, Z. Diet with a High Proportion of Rice Alters Profiles and Potential Function of Digesta-Associated Microbiota in the Ileum of Goats. Animals 2020, 10, 1261. https://doi.org/10.3390/ani10081261

AMA Style

Wang K, Ren A, Zheng M, Jiao J, Yan Q, Zhou C, Tan Z. Diet with a High Proportion of Rice Alters Profiles and Potential Function of Digesta-Associated Microbiota in the Ileum of Goats. Animals. 2020; 10(8):1261. https://doi.org/10.3390/ani10081261

Chicago/Turabian Style

Wang, Kaijun, Ao Ren, Mengli Zheng, Jinzhen Jiao, Qiongxian Yan, Chuanshe Zhou, and Zhiliang Tan. 2020. "Diet with a High Proportion of Rice Alters Profiles and Potential Function of Digesta-Associated Microbiota in the Ileum of Goats" Animals 10, no. 8: 1261. https://doi.org/10.3390/ani10081261

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