Genetic links between feeding behavior and microbiota of Romane lambs C. Marie-Etancelin, B. Gabinaud, D.Marcon, F. Tortereau, D. Francois, M.-L. De Almeida, G. Pascal, J.L. Weisbecker, A. Meynadier The aim of this study was to explore the ruminal microbiota of lambs genetically extreme for their feeding speed when eating concentrates. From a database of 1001 lambs for their feeding , we estimated breeding values for their feeding speed at the visit level, and selected amongst 77 lambs, 20 extreme lambs: 10 “high feeding speed” lambs with an average value of 57.8 g/min and 10 “low feeding speed” lambs with an average value of 26.8 g/min. The ruminal microbiota of these animals was profiled –afterfirst period of concentrates diets thn a second period of forage diets - using 16S rRNA gene sequencing were analyed with FROGS software leading to 228 OTUs with taxonomic affiliation and characterized by their relative abundances. Microbiota differences w mainly due to the type of feed ingested -with higher bacteroidetes abundances when lambs ingested concentrates- since 211 of the 228 OTUs have abundance differences with respect diet. Only 6 OTUs were different according to feeding speed of animal and concerned only minor bacterial taxa such as Bacteroidales S24_7 group family and the genus Syntrophococcus, Lachnosporacaeae NC2004 group, Ruminiclostridium and Eubacterium cellulosolvens group. Keywords: microbiota, feeding , lambs.

Christel Marie-Etancelin, Béatrice Gabinaud, Didier Marcon, Flavie Tortereau, Dominique François, Marie-Léa De Almeida, Géraldine Pascal, Jean-Louis Weisbecker, Annabelle Meynadier

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Electronic Poster Session - Biology - Feed Intake and Efficiency 2, , 409, 2018
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