Proceedings of the World Congress on Genetics Applied to Livestock Production,897 The study provides an initial insight into the informative value of fecal archaeol, a potential biomarker for methanogenesis in cattle, with regard to the abundance of the ruminal population structures. Analysis of rumen fluid samples with 16s rRNA amplicon sequencing revealed differences in abundance of rumen archaeal and bacterial community for lactating cows grouped according to their fecal archaeol concentration (low, medium or high). The results demonstrate that the abundance of the rumen methanogen and bacterial microbiota can vary widely between different archaeol phenotypes. Different methanogen genotypes may be associated with different hydrogen-producing organisms and protozoa might play an important role in this context in addition to the microbiota we have studied. Therefore, further studies on the interactions of different microbiota are necessary to obtain greater knowledge about their role for methanogenesis. Keywords: fecal archaeol, microbial community, dairy cattle, rumen microbiota

Lisa-Marie Sandberg, Nina Krattenmacher, Andrea Ulbricht, Martin Fischer, Solveig Görs, Björn Kuhla, Cornelia C Metges, Ruth A Schmitz, Georg Thaller

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Electronic Poster Session - Challenges - Environmental, , 897, 2018
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