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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 | Single-pixel imaging via compressive sampling 显示文摘 | DUARTE M F DAVENPORT M A TAKHAR D | 2008 | IEEE Signal Processing Magazine2008，25，2： | 1 |
| 3 | Single pixel imaging via compressive sampling显示文摘 | Duarte M F Davenport M A Takhar D | 2008 | IEEE Signal Pro- cessing Magazine2008，25，2： | 1 |
| 4 | Single-pixel imaging via compressive sampling 显示文摘 | Duarte M Davenport M Takhar D | 2008 | IEEE Signal Processing Maga- zine2008，25，2： | 1 |
| 5 | Effect offunctionalized carbon as Pt electrocatalyst support on themethanol oxidation reaction显示文摘 | Salgado J R C Duarte D G Ilharco L M | 2011 | Applied Catalysis B: En-vironmental2011，102，： | 1 |
| 6 | Novel acylhydrazones: Orally effective anti-inflammatory drug candidates 显示文摘 | Tributino J M Duarte C D Correa R S | 2009 | Biocrg Med Chem2009，17，3： | 1 |
| 7 | LDA and PIV characterization of the flow in a hydrocyclone without an air-ore显示文摘 | Matins L P M Duarte D G Loureiro J B R | 2010 | Journal of Petroleum Science and Engineering2010，70，34： | 1 |
| 8 | Poly(2-ethyl-2-ox- azoline)-PLA-PEI amphiphilie triblock mieells for co-deliv- ery of minicircle DNA and chemotherapeutics显示文摘 | Vitor M Cristine G Duarte D | 2014 | J Con- trolled Release2014，189，： | 1 |
| 9 | Structural studies on fucoidans from the brown seaweed Sargassum stenophyllum 显示文摘 | Duarte M E R Cardoso Marc Noseda M D | 2001 | Carbohydr Res2001，333，： | 1 |
| 10 | Characterization of clifferent fruit wines made from cacao,cupuassu,gabiroba,jaboticaba and umbu 显示文摘 | DUARTE W F DIAS D R OLWEIRA J M | 2010 | LWT - Food Science and Teclmology2010，43，10： | 1 |
| 11 | Single-pixel imaging via compressive sampling显示文摘 | DUARTE M F DAVENPORT M A TAKHAR D | 2008 | IEEE Signal Processing Magazine2008，25，2： | 1 |
| 12 | 限饲和再投喂对不同日龄鸡消化酶促反应的影响显示文摘试验旨在评价限饲和再投喂对两个不同日龄(7和35d)鸡酶活性和胃肠道器官重量的影响,在每种日龄下,鸡被限饲70%(30%自由采食)7d,然后自由采食3d。对照组自由采食10d。对胰腺中糜蛋白酶、胰蛋白酶、淀粉酶、脂肪酶活性和小肠中蔗糖酶、麦芽糖酶的活性进行分析,并且测量了腺胃、肌胃、小肠和大肠的重量。在14d,与对照组相比,限饲组的胰蛋白酶、淀粉酶活性均降低,但在42d,与对照组相比,限饲组蔗糖酶活性降低,表明限饲对酶活性的影响与日龄有关。限饲可以降低完成期(42d)各器官的重量。日龄35~42d的鸡,在再投喂后,器官重量增加,并且达到与对照组一致。在起始期(14d),腺胃和肌胃受限饲的影响很小,在完成期,肌胃也是受影响最小的器官,而小肠时受影响最严重。限饲的所有影响在恢复饲喂3d后被逆转,表明这种改变时快速且可逆的,并且限饲和再投喂与年龄有关。 | Cristiane R A Duarte Maria L M Vicentini P Pinheiro D F | 2014 | 饲料博览2014，0，10： | 1 |
| 13 | An examination of the determi-nants of entertainment vacationers intentions to revisit显示文摘 | Petrick J F Duarte D M William C N | | 0，，01： | 1 |
| 14 | Sequence analysis of the porcine epidemic diarrhea virus genome between the nucleocapsid and spike protein genes reveals a polymorphic ORF显示文摘 | Duarte M Tobler K Bridgen A Rasschaert D Ackermann M and Laude H | 1994 | Virology1994，198，2： | 1 |
| 15 | A grobacterium tumefaciens-mediated genetic transformation of the entomopathogenic fungus Beauveria bassiana 显示文摘 | Dos Reis M C Fungaro M H P Duarte R T D | 2004 | Journal of Microbiological Methods2004，58，： | 1 |
| 16 | Comparison of three methods to estimate the center of mass during balance assessment显示文摘 | Lafond D Duarte M Prince F | | 0，，： | 1 |
| 17 | Single-pixel imaging via compressive sampling 显示文摘 | Duarte M F Davenport M A Takhar D | 2008 | IEEE Trans on Signal Processing Magazine2008，25，2： | 1 |
| 18 | Sin-gle-pixel imaging via compressive sampling显示文摘 | Duarte M F Davenport M A Takhar D | 2008 | Sig-nal Processing Magazine2008，25，2： | 1 |
| 19 | Photo-induced Chemiluminescence-based Determination of Diphenamid by Using a Multicommuted Flow System显示文摘 | Czescik A Malo D Lopez Duart M J | | 0，，04： | 1 |
| 20 | Single-pixel imaging via compressive sampling显示文摘 | DUARTE M DAVENPORT M TAKHAR D | 2008 | IEEE Signal Processing Magazine2008，25，2： | 1 |
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