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| 1 | Assessing the relationship between the rumen microbiota and feed efficiency in Nellore steers显示文摘Background:Ruminants rely upon a complex community of microbes in their rumen to convert host-indigestible feed into nutrients.However,little is known about the association between the rumen microbiota and feed efficiency traits in Nellore(Bos indicus)cattle,a breed of major economic importance to the global beef market.Here,we compare the composition of the bacterial,archaeal and fungal communities in the rumen of Nellore steers with high and low feed efficiency(FE)phenotypes,as measured by residual feed intake(RFI).Results:The Firmicutes to Bacteroidetes ratio was significantly higher(P<0.05)in positive-RFI steers(p-RFI,low feed efficiency)than in negative-RFI(n-RFI,high feed efficiency)steers.The differences in bacterial composition from steers with high and low FE were mainly associated with members of the families Lachnospiraceae,Ruminococcaceae and Christensenellaceae,as well as the genus Prevotella.Archaeal community richness was lower(P<0.05)in p-RFI than in n-RFI steers and the genus Methanobrevibacter was either increased or exclusive of p-RFI steers.The fungal genus Buwchfawromyces was more abundant in the rumen solid fraction of n-RFI steers(P<0.05)and a highly abundant OTU belonging to the genus Piromyces was also increased in the rumen microbiota of highefficiency steers.However,analysis of rumen fermentation variables and functional predictions indicated similar metabolic outputs for the microbiota of distinct FE groups.Conclusions:Our results demonstrate that differences in the ruminal microbiota of high and low FE Nellore steers comprise specific taxa from the bacterial,archaeal and fungal communities.Biomarker OTUs belonging to the genus Piromyces were identified in animals showing high feed efficiency,whereas among archaea,Methanobrevibacter was associated with steers classified as p-RFI.The identification of specific RFI-associated microorganisms in Nellore steers could guide further studies targeting the isolation and functional characterization of rumen microbes potentially important for the energy-harvesting efficiency of ruminants. | Déborah Romaskevis Gomes Lopes Márcio de Souza Duarte Alex J.La Reau Ibrahim Zuniga Chaves Tiago Antônio de Oliveira Mendes Edenio Detmann Cláudia Braga Pereira Bento Maria Eugênia Zerlotti Mercadante Sarah Figueiredo Martins Bonilha Garret Suen Hilário Cuquetto Mantovani | 2021 | Journal of Animal Science and Biotechnology2021，12，4： | 3 |
| 2 | WMAP constraints on the generalized Chaplygin gas model 显示文摘 | Bento M C Bertolami O Sen A A | 2003 | Physics Letters B2003，575，3： | 1 |
| 3 | Biodegradation of colorants in refinery effluents : potential use of the fungus Phanerochaete chrysosporium显示文摘 | Guimaraes C Bento L S M Mota M | 1999 | International Sugar Journal1999，101，： | 1 |
| 4 | Generalized Chaplygin gas, accelerated expansion, and dark-energy-matter unification 显示文摘 | Bento C M Bertolami O Sen A A | 2002 | Phys Rev D2002，，： | 1 |
| 5 | The effect of feeding essential oils on broiler perform- ance and gut microbiota 显示文摘 | TIIHONEN K KETTUNEN H BENTO M H L | 2010 | British Poultry Science2010，51，3： | 1 |
| 6 | Seismic behavior of dual systems with column hinging显示文摘 | LOPES M S BENTO R | 2001 | Earthquake Spectra2001，17，4： | 1 |
| 7 | Female sex pheromone of the longhorn beetle Migdolus fryanus Westwood: N- ( 2' S ) - methylbutanoyl 2-methylbutlyamine 显示文摘 | Leal W S Bento J M S Vilela E F | 1994 | Experientia1994，50，： | 1 |
| 8 | Anti-dsDNA, anti-Sm antibodies, and lupus anticogulant: significant factors associated with lupus nephritis显示文摘 | Alba P Bento L Cuadrado M J | 2003 | Ann Rheum Dis2003，62，6： | 1 |
| 9 | Comparative bioremediation of soils contaminated with diesel oil by natural attenuation,biostimulation and bioaugmentation显示文摘 | Bento F M Camargo F A Okeke B C | 2005 | Bioresource technology2005，96，： | 1 |
| 10 | Microbial contam ination of stored diesel oil in Brazil显示文摘 | BENTO F M GAYLARDE C C | 1996 | Rev Microbiol1996，27，： | 1 |
| 11 | Evaluation of three molecular assays for rapid identification of methicillin-resistant Staphylococcus aureus显示文摘 | Francois P Bento M Renzi G Harbarth S Pittet D Schrenzel J | | Journal of Clinical Microbiology0，，： | 1 |
| 12 | Comparative bioremediation of soils contaminated with diesel oil by natural attenuation, biostimulation and bioaugmentation 显示文摘 | Bento F M Camargo F A O Okeke B C | 2005 | Bioresource Technology2005，96，9： | 1 |
| 13 | Intensive therapy with ceftobiprole medocaril of experimental foreign-body infection by methicillin-resistant Staphylococcus aureus显示文摘 | VAUDAUX P GJINOVCI A BENTO M | 2005 | Antimicrob Agents Chemother2005，49，9： | 1 |
| 14 | The Revival of the Unified Dark Energy-Dark Matter Model?显示文摘 | BENTO M C BERTOLAMI O | 2004 | Phys Rev2004，70，08： | 1 |
| 15 | Chromate reduction by chromium-resistant bacteria isolated from soils contaminated with dichromate显示文摘 | CAMARGO F A O BENTO F M OKEKE B C | 2003 | ] Environ Qual2003，32，2： | 1 |
| 16 | Rapid detection of Me- thicillin-resistant Staphylococcus aureus directly from sterile or nonsterile clinical samples by a new molecular assay显示文摘 | Francois P Pittet D Bento M | 2003 | J Clin Microbiol2003，41，1： | 1 |
| 17 | A Generalized Chaplygin Gas显示文摘 | BENTO M C BERTOLAMI O SEN A | 2002 | Phys Rev2002，66，04： | 1 |
| 18 | Rapid detection of methicillin -resistant staphylococcus aureus directly from sterile or nonsterile clinical samples by a new molecular assay 显示文摘 | Francois P Pittet D Bento M | 2003 | J Clin Microbiol2003，41，1： | 1 |
| 19 | NiFeZn codepositas a cathode material for the production of hydrogen by waterelectrolysis显示文摘 | GIZ M J BENTO S C GONZALEZ E R | 2000 | Int J Hydrogen Energy2000，25，7： | 1 |
| 20 | Artificial neural network (ANN) prediction of kinetic parameters of (CRFC) composites显示文摘 | Bezerra E M Bento M S Rocco J A F F | 2008 | Computational Materials Science2008，44，2： | 1 |
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