Association between Rumen Microbiota and Marbling Score in Korean Native Beef Cattle

Abstract

This study demonstrated the potential effects of the rumen microbiota on the deposition of intramuscular fat, known as marbling. Previous studies on fatty acid metabolism in beef cattle have mostly focused on biohydrogenating rumen bacteria, whereas those on the overall rumen microbiota—to understand their roles in marbling—have not been systematically performed. The rumen microbiota of 14 Korean beef cattle (Hanwoo), which showed similar carcass characteristics and blood metabolites but different marbling scores, were analyzed by 16S rRNA gene sequencing. The rumen samples were grouped into two extreme marbling score groups of host animals as follows: LMS, marbling score≤ 4 or HMS, marbling score ≥7. Species richness tended to be higher in the HMS group, whereas the overall microbiota differed between LMS and HMS groups. RFP12, Verrucomicrobia, Oscillospira, Porphyromonadaceae, and Paludibacter were differentially abundant in the HMS group, whereas Olsenella was abundant in the LMS group. Some marbling-associated bacterial taxa also contributed to the enrichment of two lipid metabolic pathways including “alpha-linolenic acid metabolism” and “fatty acid biosynthesis” in the HMS microbiome. Taxonomic drivers of fatty acid biosynthesis, particularly in the rumen microbiome of high-marbled meat, could thus be further studied to increase the intramuscular fat content.

Dynamics of the ruminal microbial ecosystem, and inhibition of methanogenesis and propiogenesis in response to nitrate feeding to Holstein calves

“…Although very little is known about these bacteria, the relative abundance of the Erysipelotrichaceae family has been associated with the energy and protein metabolism of animal gut microbiota ( Bermingham et al., 2017 ). Some previous studies on beef cattle showed a positive correlation between the abundance of L7A_E11 and total VFA concentration ( Bi et al., 2018 ), and with the level of muscle marbling ( Kim et al., 2020 ). However, their role in the rumen remains unknown.…”

Transcriptome Analysis of Bovine Rumen Tissue in Three Developmental Stages

“…In previous reported, rumen microbiota may affect the MS, adjusted 12th rib fat thickness, and other traits (Reddy et al, 2017;Kim et al, 2020), and its fermentation product VFAs can promote muscle growth (Kristensen et al, 2007). To investigate whether DEGs and gene co-expression modules were enriched with GWAS signals of carcass and other traits, we applied a sum-based method for GWAS signals enrichment analyses (sumGSE, https://github.…”

Using Untargeted LC-MS Metabolomics to Identify the Association of Biomarkers in Cattle Feces with Marbling Standard Longissimus Lumborum

“…Non-invasive methods are the better choice. Nowadays, there are a variety of omics methods to explore the molecular mechanism that influences IMF, such as genomics [ 4 , 5 ], transcriptomics [ 6 , 7 , 8 ], and 16S rRNA gene sequencing [ 9 , 10 ]. However, metabolic profiles are hardly used to explore marbling beef phenotypes.…”