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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 | Building the Internet of Things Using RFID: The RFID Ecosystem Experience显示文摘 | Welbourne Evan Battle Leilani Cole Garret Gould Kayla Rector Kyle Raymer Samuel Balazinska Magdalena Borriello Gaetano | 2009 | IEEE Internet Computing2009，，3： | 2 |
| 3 | Varicella zoster virus infection in inflammatory bowel disease显示文摘 | Garret Cullen Rachel P. Baden Adam S. Cheifetz | 2012 | Inflamm Bowel Dis2012，，12： | 2 |
| 4 | Reverse saturable absorption of C60 in liquids irradiated by picosecond and nanosecond laser pulses 显示文摘 | V V Golovlev W R Garret C H Chen | 1996 | J Opt Soc Am B1996，13，12： | 1 |
| 5 | Intensive chemotherapy and radicaf resections for primary nonse minomatous mediastinaf germ ceff tumors显示文摘 | Garret L W Grant D T Jonathan C N | 2000 | Ann Thorac Surg2000，69，： | 1 |
| 6 | Computer-AssistedLanguageLearningTrendsandIssuesRevisited:Integrating Innovation 显示文摘 | Garret N | 2009 | TheModernLanguageJournal(FocusIssue)2009，93，： | 1 |
| 7 | Testicular calcification in a 4-year-old boy显示文摘 | Priebe CJ Jr Garret R | 1970 | Pedistries1970，46，5： | 1 |
| 8 | Mechanically activatedsynthesis studied by X-ray diffraction in the Fe-AI system显示文摘 | Chariot F Garret E Zeghmati B | 1999 | Materials Science & Engineering1999，262，： | 1 |
| 9 | Fresh osteochondral allogratts for treatment of articular defects in osteochondritis diseases of the lateral femoral condyle in adults 显示文摘 | Garret JC | 1994 | Clin Orthop1994，303，： | 1 |
| 10 | Wave forces on a circular dock 显示文摘 | GARRET C J R | 1971 | Flu- id Mesh1971，46，： | 1 |
| 11 | On the interaction between internal gravity waves and a shear flow显示文摘 | Garret C J R | 1968 | J Fluid Mech1968，34，： | 1 |
| 12 | Knowledge-Based Modeling of Material Behavior with Neural Networks 显示文摘 | Ghaboussi Garret J Jr J H | 1991 | Journal of Engineering Mechanics Division ASCE1991，117，1： | 1 |
| 13 | A new approach to defining functional ability in ankylosing spondylitis:The development of the Bath ankylosing spondylitis disease function index显示文摘 | Calin A Garret S Whitelock H | 1994 | J Rheumatol1994，21，12： | 1 |
| 14 | The Tragedy of the Common显示文摘 | Garret Hardin | 1968 | Science1968，，162： | 1 |
| 15 | A Classification and Meta-analysis of Community-based Directly Observed Therapy Programs for Tuberculosis Treatment in Developing Countries显示文摘 | Shreya Kangovi Joia Mukherjee Richard Bohmer Garret Fitzmaurice | 2009 | Journal of Community Health2009，，6： | 1 |
| 16 | Characte-rization of differentially measured strain using passive wirelesssurface acoustic wave ( SAW) strain sensors 显示文摘 | Stoney Rory Geraghty Dermot 0 ' Donnell Garret E | 2014 | IEEE SensorsJournal2014，14，3： | 1 |
| 17 | A new approach to defining disease status in ankylosing spondylitis:The Bath ankylosing spondylitis disease activity index显示文摘 | Garret S Jenkinson J kennedy LG | 1994 | J Rheumatol1994，21，12： | 1 |
| 18 | Cooperative Strategy显示文摘 | Dussauge P Garrete B | 1999 | JOHN Wilez&Sons1999，1，33： | 1 |
| 19 | Knowledge based modeling of material behaviour with neural networks显示文摘 | Ghabousi J Garret Jr JH Wu X | | 0，，01： | 1 |
| 20 | Determination of total and segmental colonic transit time in constipated patients显示文摘 | Stanislas Chaussade Abdallah Khyari Hervé Roche Marc Garret Marianne Gaudric Daniel Couturier Jean Guerre | 1989 | Digestive Diseases and Sciences1989，，8： | 1 |
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