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Hanne Honerlagen

Host genetic and rumen microbial determinants of nitrogen (N) utilisation and N excretion in lactating Holsteins

Universität Rostock, 2022

https://doi.org/10.18453/rosdok_id00004473

Abstract: Enhancing the nitrogen (N) utilisation efficiency (NUE) of dairy cows by breeding selection was considered relevant for environmental footprints, feeding costs and animal health. It was hypothesised that cow-individual NUE is determined by the entire “holobiont”, thus by the host genome and the rumen microbiome. In this context four study approaches were conducted, which focused on the host genome-trait, the host genome-rumen microbiota and the entire host genome-rumen microbiota-trait axis, aiming for a holistic exploration of cow-individual NUE as a pre-step for future breeding strategies.

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