Combined signature of rumen microbiome and metabolome in dairy cows with different feed intake levels.

Journal of Animal Science
Yeqing Q LiZhaoyu Han

Abstract

Feed intake is a major factor in maintaining the balance between ruminal fermentation and the microbial community of dairy cows. To explore the relationship among feed intake, microbial metabolism, and ruminal fermentation, we examined the combined signatures of the microbiome and metabolome in dairy cows with different feed intake levels. Eighteen dairy cows were allocated to high feed intake (HFI), medium feed intake (MFI), and low feed intake (LFI) groups according to their average daily feed intake. 16S rDNA sequencing results revealed that the relative abundance of Firmicutes in the HFI group was significantly higher than that in the MFI and LFI groups (P < 0.05). The ratio of Bacteroidetes to Firmicutes was significantly lower in the HFI group than in the MFI and LFI groups (P < 0.05). The relative abundance of Lachnospiraceae_unclassified, Veillonellaceae_unclassified, and Saccharofermentants was significantly higher in the HFI group than in the LFI and MFI groups (P < 0.05). The relative abundance of Erysipelotrichaceae_unclassified and Butyrivibrio was significantly higher in the HFI group than in the MFI and LFI groups (P < 0.05). Ultra high performance liquid chromatography-mass spectrometry revealed five key pathway...Continue Reading

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Citations

Sep 30, 2021·Journal of Animal Science
Apr 30, 2021·Journal of the Science of Food and Agriculture·Amanda Camila de PoppiJoão Luiz Pratti Daniel

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