Data/hora: 06/06/2024 12:04:59

Biblioteca(s): 	Embrapa Gado de Leite.	
Data corrente: 	03/04/2024	
Data da última atualização: 	03/04/2024	
Autoria: 	FREGULIA, P.; DIAS, R. J. P.; CAMPOS, M. M.; TOMICH, T. R.; PEREIRA, L. G. R.; NEVES, A. L. A.	
Afiliação: 	PRISCILA FREGULIA, UNIVERSIDADE FEDERAL DE JUIZ DE FORA; ROBERTO JÚNIO PEDROSO DIAS, UNIVERSIDADE FEDERAL DE JUIZ DE FORA; MARIANA MAGALHAES CAMPOS, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; ANDRÉ LUIS ALVES NEVES, UNIVERSITY OF COPENHAGEN.	
Título: 	Composition of the rumen microbiome and its association with methane yield in dairy cattle raised in tropical conditions.	
Ano de publicação: 	2024	
Fonte/Imprenta: 	Molecular Biology Reports, v. 51, 447, 2024.	
DOI: 	https://doi.org/10.1007/s11033-024-09381-0	
Idioma: 	Inglês	
Conteúdo: 	Background- Methane (CH4) emissions from rumen fermentation are a significant contributor to global warming. Cattle with high CH4 emissions tend to exhibit lower efficiency in milk and meat production, as CH4 production represents a loss of the gross energy ingested by the animal. The objective of this study was to investigate the taxonomic and functional composition of the rumen microbiome associated with methane yield phenotype in dairy cattle raised in tropical areas. Methods and results - Twenty-two Girolando (F1 Holstein x Gyr) heifers were classified based on their methane yield (g CH4 / kg dry matter intake (DMI)) as High CH4 yield and Low CH4 yield. Rumen contents were collected and analyzed using amplicon sequencing targeting the 16 and 18S rRNA genes. The diversity indexes showed no differences for the rumen microbiota associated with the high and low methane yield groups. However, the sparse partial least squares discriminant analysis (sPLS-DA) revealed different taxonomic profiles of prokaryotes related to High and Low CH4, but no difference was found for protozoa. The predicted functional profile of both prokaryotes and protozoa differed between High- and Low CH4 groups. Conclusions - Our results suggest differences in rumen microbial composition between CH4 yield groups, with specific microorganisms being strongly associated with the Low (e.g. Veillonellaceae_UCG−001) and High (e.g., Entodinium) CH4 groups. Additionally, specific microbial functions were found to be differentially more abundant in the Low CH4 group, such as K19341, as opposed to the High CH4 group, where K05352 was more prevalent. This study reinforces that identifying the key functional niches within the rumen is vital to understanding the ecological interplay that drives methane production.	
Palavras-Chave: 	Enteric methane.	
Thesagro: 	Bovino; Efeito Estufa; Gado Leiteiro; Gás; Metano.	
Thesaurus Nal: 	Greenhouse gases.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Gado de Leite (CNPGL)	
Exemplares: 	CNPGL - (26309-1) - UPC - AP - DD -  -  -  - DIS