- About
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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
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Associations between the gastrointestinal microbiome and nitrogen efficiency in Holstein and Jersey cowsDe La Guardia Hidrogo, Vanessa Michelle 06 August 2021 (has links)
Manure nitrogen in dairy cattle represents a substantial economic and environmental loss to the industry. Current strategies used to improve N efficiency (Neff) have shown limited progress and thus, warrant more effective approaches. Considering that the gastrointestinal bacterial community has been associated with various phenotypes of economic importance, the objective of this project was to evaluate the associations between the rumen and fecal bacteriomes and Neff phenotypes in dairy cows. Results showed similarities in the overall bacterial community composition and structure of cows differing in Neff. However, the relative abundance of specific bacterial ASV differed between low and high Neff cows. Furthermore, bacterial ASV strongly correlated with Neff could be involved in processes such as nutrient supply, performance, and feed efficiency. These suggest that the gastrointestinal bacterial community is a factor influencing Neff in dairy cows and specific bacterial members can potentially serve as markers of Neff phenotypes.
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Genetic Variation for Nitrogen Efficiency in Oilseed rape (Brassica napus L.) / Genetische Variation der Stickstoff-Effizienz bei Winterraps (Brassica napus L.)Nyikako, John 17 July 2003 (has links)
No description available.
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