114 Alterations of the rumen bacterial and archaeal communities in growing and finishing beef cattle and its effects on methane emissions

Knoell, Allison; Anderson, Christopher L.; Pesta, Anna C.; Erickson, Galen E.; Klopfenstein, Terry J.; Fernando, Samodha C.

doi:10.2527/msasas2016-114

Cited by 6 publications

(3 citation statements)

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“…The rumen of ruminants is a dynamic and complex microecosystem that consists mostly of bacteria, protozoa, archaea, and fungi (Mackie et al, 2000;Knoell et al, 2016). Bacteria are the dominant microorganism group (Pitta et al, 2016), and some of these microorganisms that are attached to feed particles participate in the transformation of plant ingredients into animal products (Preston and Leng, 1987;Han et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Effects of Dietary Energy Levels on Rumen Fermentation, Gastrointestinal Tract Histology, and Bacterial Community Diversity in Fattening Male Hu Lambs

Wang¹,

Zeng²,

Zeng³

et al. 2021

Front. Microbiol.

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This study investigated rumen fermentation and histological and microbial diversity in male Hu lamb fed diets with different metabolizable energy (ME) levels (MEA, 9.17 MJ/kg, MEB, 10.00 MJ/kg, and MEC, 10.82 MJ/kg). Thirty-six male Hu lambs were randomly allotted to three treatments, and the feeding trial lasted for 67 days. Rumen fermentation results suggest that the iso-valerate had a significant effect on dietary energy level. The papillary height (PH) of rumen was the highest in the MEB group, the crypt depth (CD) was significantly increased in the duodenum and jejunum, and the villus height (VH)-to-CD ratio (VH/CD) was significantly decreased in the duodenum by increasing dietary energy levels; the VH, villus width (VW), and VH/CD also had significant differences in the ileum. 16S rRNA sequencing results showed that the operational taxonomic units (OTUs) number, the ACE, and Chao1 indices were linearly decreased by increasing dietary energy level; 24 phyla including 124 genera were identified, and the relative abundance of Papillibacter and Quinella linearly decreased by increasing the dietary energy level. Compared to MEA and MEB groups, the relative abundance of unidentified_Veillonellaceae and Anaerovibrio was significantly increased in the MEC group at the genus level. The relative abundance of the carbohydrate metabolism pathway predicted by Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) was linearly increased by increasing the dietary energy levels. Three metabolic pathways identified in Kyoto Encyclopedia of Genes and Genomes (KEGG) level 3 were significantly influenced as the dietary energy level increased. In summary, these results demonstrated that the dietary energy levels affected the rumen fermentation parameters, morphological structures of the gastrointestinal tract (GIT), and the composition and function of rumen microflora in male Hu sheep.

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Section: Introductionmentioning

confidence: 99%

Effects of Dietary Energy Levels on Rumen Fermentation, Gastrointestinal Tract Histology, and Bacterial Community Diversity in Fattening Male Hu Lambs

Wang¹,

Zeng²,

Zeng³

et al. 2021

Front. Microbiol.

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“…Bacteria is the dominant microorganism group in the rumen micro‐ecosystem. Some of which are attached to feed particles can transform the plant ingredients into animal products (Han et al., 2015; Knoell et al., 2016; Pitta et al., 2016). Microbial activity is mostly limited by dietary nutrition, and energy and protein, particularly, are the two determinants (Clark, 1975; Clark & Davis, 1980).…”

Section: Introductionmentioning

confidence: 99%

Effects of dietary energy levels on rumen fermentation, microbiota, and gastrointestinal morphology in growing ewes

Wang

et al. 2020

Food Science & Nutrition

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“…Propionate pathway enhancement in high-quality forage diets serves as a hydrogen sink for methanogens. In the propionate pathway, which is enhanced by high-quality forage-based diets, betaproteobacteria genes were found to be present, suggesting a syntrophic relationship may be at play to lower methane emissions in beef cattle [37]. The distinct group of rumen methanogens whose transcriptional profiles along the ethnogenesis pathway correlate with methane yields and offer fresh options for reducing CH4 at the levels of microbiota composition and transcriptional control [38].…”

Section: Selecting For Low-methane Producing Ruminantsmentioning

confidence: 99%

Technology for Carbon Neutral Animal Breeding

Mekonnen¹

2024

Veterinary Medicine and Science

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Animal breeding techniques are to genetically select highly productive animals with less GHG emission intensity, thereby reducing the number of animals required to produce the same amount of food. Shotgun metagenomics provides a platform to identify rumen microbial communities and genetic markers associated with CH4 emissions, allowing the selection of cattle with less CH4 emissions. Moreover, breeding is a viable option to make real progress towards carbon neutrality with a very high rate of return on investment and a very modest cost per tonne of CO2 equivalents saved regardless of the accounting method. Other high technologies include the use of cloned livestock animals and the manipulation of traits by controlling target genes with improved productivity.

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114 Alterations of the rumen bacterial and archaeal communities in growing and finishing beef cattle and its effects on methane emissions

Cited by 6 publications

References 0 publications

Effects of Dietary Energy Levels on Rumen Fermentation, Gastrointestinal Tract Histology, and Bacterial Community Diversity in Fattening Male Hu Lambs

Effects of Dietary Energy Levels on Rumen Fermentation, Gastrointestinal Tract Histology, and Bacterial Community Diversity in Fattening Male Hu Lambs

Effects of dietary energy levels on rumen fermentation, microbiota, and gastrointestinal morphology in growing ewes

Technology for Carbon Neutral Animal Breeding

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