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Bacterial community diversity associated with different levels of dietary nutrition in the rumen of sheep.

Abstract：

:The sheep rumen microbial community plays an important role in animal performance and the environment. Few studies have paid close attention to the impact of different levels of dietary nutrition on rumen microbial populations. A total of 112 healthy Tan sheep were selected and randomly allotted to one of four dietary treatments (groups I, II, III, and IV). Each treatment included four replicated pens with seven sheep each for a total of 28 sheep per treatment. The sheep were fed four diets with nutrient levels that were 84, 96, 108, or 120% of the recommendation. In this study, a next-generation sequencing strategy and quantitative real-time PCR analysis were applied to investigate changes in whole ruminal bacteria with increased dietary energy and protein levels. The study observed 133 genera belonging to 16 phyla distributed throughout the rumen samples, with Firmicutes and Bacteroidetes predominating. Additionally, the higher nutritional dietary level linearly increased (P < 0.05) the number of Bacteroidetes and Proteobacteria but linearly decreased (P < 0.05) the Firmicutes richness. At the species level, the abundance of Prevotella ruminicola, Ruminococcus flavefaciens, and Succinivibrio dextrinosolvens linearly increased (P < 0.05), whereas the abundance of Selenomonas ruminantium and Veillonella parvula did not (P > 0.05). Furthermore, we predicted the potential functions of rumen bacteria. In particular, the relative abundances of the genes related to carbohydrates were overrepresented, and the genes involved in amino acid metabolism linearly increased (P < 0.05). These findings provide the first deep insights into the rumen microbial composition and the targeted improvement of dietary protein and energy use efficiency in Tan sheep.

journal_name

Appl Microbiol Biotechnol

journal_title

Applied microbiology and biotechnology

authors

Wang Y,Cao P,Wang L,Zhao Z,Chen Y,Yang Y

doi

10.1007/s00253-017-8144-5

subject

Has Abstract

pub_date

2017-05-01 00:00:00

pages

3717-3728

issue

9

eissn

0175-7598

issn

1432-0614

pii

10.1007/s00253-017-8144-5

journal_volume

101

pub_type

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