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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 | Resurfacing of goat articular cartilage by chondrocytes derived from bone marrow 显示文摘 | Butnariu-Ephrat M Robinson D Mendes DG | 1996 | Clin Orthop1996，330，： | 1 |
| 3 | Manufacturing Firm Reaction to Supplier Failure and Recovery显示文摘 | Marcos Andre Mendes P Kevin D Rungtusanatham M J | 2007 | International Journal of Operations & Production Management2007，27，3： | 1 |
| 4 | Resurfacing of gaot articular cartilage by chondrocytes derived from bone marrow显示文摘 | BUTNARIU E M ROBINSON D MENDES D G | 1996 | Clin Orthop1996，，330： | 1 |
| 5 | Expression of transforming growth factor-beta1 and hypoxia-inducible factor-1alpha in an experimental model of kidney transplantation显示文摘 | Lario S Mendes D Bescòs M | 2003 | Transplantation2003，75，10： | 1 |
| 6 | Enhanced UVB radiation under field conditions increases anthocyanin and reduces the risk of photomhibition but does not affect growth in the carnivorous plant Pinguicula vulgaris显示文摘 | Mende M Jones D G Manetas Y | 1999 | New Phytologist1999，144，： | 1 |
| 7 | Removal of industrial cutting oil from oil emulsions by polymeric ultra- and microfiltration membranes 显示文摘 | Janknecht P Lopes A D Mendes A M | 2004 | Environmental Science and Technology2004，38，18： | 1 |
| 8 | Current tools for the identification of mi RNA genes and their targets显示文摘 | Mendes N D Freitas A T Sagot M F | 2009 | Nucleic Acids Research2009，37，8： | 1 |
| 9 | The water-gas shift reaction: From conventional catalytic systems to Pd-based membrane reactors-a review 显示文摘 | Mendes D Mendes A Madeira L M | 2009 | Asia-Pac J Chem Eng2009，5，1： | 1 |
| 10 | A general bivariate Ricean model and its statistics显示文摘 | Mendes J R Yacoub M D | 2007 | IEEE Transactions on Vehic- ular Technology2007，56，2： | 1 |
| 11 | The prediction of Marangoni convection in binary liquid -liquid systems with added surfactants显示文摘 | AGBLE D MENDES - TATSIS M A | 2001 | International Journal of Heat and Mass Transfer2001，44，： | 1 |
| 12 | Geotechnical influence on the acoustic properties of marinesediments of the Santos Basin, Brazil显示文摘 | NETO A A MENDES J D T DE SOUZA J M G 2013 | 2013 | Marine Georesources& Geotechnology2013，31，2： | 1 |
| 13 | Expression of transforming growth factor-betal and hypoxia-inducible factor-1alpha in an experimental model of kidney transplantation 显示文摘 | Lario S Mendes D Bescos M ET AL | 2003 | Transplantation2003，75，： | 1 |
| 14 | Resurfacing of goat articular cartilage by chondrocytes derived from bone marrow显示文摘 | Butnariu-Ephrat M Robinson D Mendes DG | 1996 | Clin Orthop Relat Res1996，，330： | 1 |
| 15 | Solubility of carbon dioxide in aqueous solutions of amino acid salts显示文摘 | Portugal A F Sousa J M Magalh(a)es F D Mendes A | | 0，，09： | 1 |
| 16 | Resurfacing of gaotarticular cartilage by chondrocytes derived from bone marrow显示文摘 | Butnariu Ephrat M Robinson D Mendes DG | 1996 | Clin Orthop1996，，330： | 1 |
| 17 | Highly efficient homologous integration via tandem exo -β-1,3-glucanasa genes in the common mushroom, Agaricus bisporus 显示文摘 | Van de Rhee M D Mendes O Werten M W T | 1996 | Current Genetics1996，30，2： | 1 |
| 18 | Madelung' s disease 显示文摘 | Sokolov M Mendes D Ophir D | 2010 | Isr Med Assoc J2010，12，4： | 1 |
| 19 | in Finance显示文摘 | Mendes B V Semeraro D M Leal M M Pair-copulas modeling R P C | 2010 | Financial Markets and Portfolio Management2010，24，2： | 1 |
| 20 | A simple and efficient method for the evaluation of effective thermal conductivity of open-cell foam-like structures 显示文摘 | Mendes M A A Ray S Trimis D | 2013 | International Journal of Heat and Mass Transfer2013，66，： | 1 |
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