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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 | Mapping QTL for grain yield and plant traits in a tropical maize popula- tion显示文摘 | Milena L Souza C Bento D | 2006 | Mol Breed2006，17，： | 1 |
| 3 | Amino acid changes within the Bunyamwera virus nucleocapsid protein differentially affect the mRNA transcription and RNA replication activities of assembled ribonucleoprotein templates显示文摘 | Walter C T Bento D F C Alonso A G Barr J N | 2011 | J Gen Virol2011，92，1： | 1 |
| 4 | 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 |
| 5 | 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 |
| 6 | 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 |
| 7 | Rapid detection of methicil- lin-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 |
| 8 | Rapid detection of me- thicillin resistance staphylococcus aureus directly from sterile or nonsterile clinical samples by a new molecular assay显示文摘 | Francois P Pittet D Bento M etal | 2003 | J Clin Mierobiol2003，41，1： | 1 |
| 9 | Protective periopera- tive strategy using a third generation hydroxyethyl starch during surgery in a murine model of liver reperfusion injury 显示文摘 | Catre D Lopes MF Bento C | 2011 | Acta Cir Bras2011，26，6： | 1 |
| 10 | Rapid detection of Methicillin-re-sistant Staphy lococcus aureus divectly from sterileor nonsterile clinical samples by a new molecular assay显示文摘 | Francois P Pittet D Bento M | | 0，，： | 1 |
| 11 | Rare-earth doped low silica calcium aluminosilicate glasses for near and mid infrared applications显示文摘 | Baesso M L Bento A C Miranda L C M de Souza D F Sampaio J A Nunes L A O | | 0，，1： | 1 |
| 12 | 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 | Am Soc Microbiol2003，41，1： | 1 |
| 13 | Mapping QTL for grain yield and plant traits in a tropical maize population 显示文摘 | MILENA L SOUZA C BENTO D | 2006 | Mol Breed2006，17，： | 1 |
| 14 | Application of the one-cycle control technique to a three- phase three-level NPC rectifier显示文摘 | Bento A A M Vieira P K P Silva E R C D | 2014 | IEEE Transactions on Industry Applications2014，50，2： | 1 |
| 15 | Tailoring activated carbon by surface chemical modification with O, S, and N containing molecules 显示文摘 | Rios R R V A Alves D E Dalmazio I Bento S F V Donnici C L Lago R M | 2003 | Materials Research2003，6，2： | 1 |
| 16 | Rapid detection of methicillin-resistant Staphylococcus aureus directly from steril or nonsteril clinical sampls by a new molcular assay显示文摘 | Pittet D Bento M | 2003 | J Clin Microbiol2003，41，： | 1 |
| 17 | Application of the one-cycle control technique to a three-phase threelevel NPC rectifier显示文摘 | BENTO A A D M VIERA P K P DA SILVA E R C | 2014 | IEEE Transactions on Industry Applications2014，50，2： | 1 |
| 18 | Oxidative stress in micetreated with antileishmanial meglumine antimoniate 显示文摘 | Bento D B De Souza B Steckert A V | 2013 | Research in Veterinary Science2013，95，3： | 1 |
| 19 | Protective perioperative strategy using a third generation hydroxyethy]starch during surgery in a murine model of liver reperfusion injury显示文摘 | Catré D Lopes MF Bento C | | 0，，06： | 1 |
| 20 | Mapping QTL for grain yield and plant traits in a tropical maize population显示文摘 | MILENA L SOUZA C BENTO D | 2006 | Mol Breed2006，17，： | 1 |
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