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Association between host genetics of sheep and the rumen microbial composition
Sinalo Mani1,2, Olayinka Ayobami Aiyegoro3,4, Matthew Adekunle Adeleke2
1GI Microbiology and Biotechnology Unit, Agricultural Research Council- Animal Production, Private Bag X02, Irene, 0062, South Africa.
Tropical Animal Health and Production
|February 22, 2022
Summary
Host genetics significantly influence sheep rumen microbiome composition. This study identified key genes linking host DNA to specific bacterial genera, offering insights into sheep health and symbiotic relationships.
Area of Science:
- Animal Genetics and Microbiology
- Rumen microbiome research
- Host-microbe interactions in livestock
Background:
- The rumen microbiome and host genetics form a crucial symbiotic relationship for sheep health.
- Understanding these interactions is vital for improving animal well-being and productivity.
Purpose of the Study:
- To investigate the association between host genetics and the rumen microbiome composition in Damara and Meatmaster sheep.
- To identify genetic factors influencing the abundance of specific rumen microbial genera.
Main Methods:
- Rumen microbial composition was analyzed using 16S rRNA gene sequencing (V3-V4 region).
- Sheep DNA was genotyped using the Illumina OvineSNP50 BeadChip.
- Genome-wide association (GWA) analysis was performed to link genetic markers to microbial abundance.
Main Results:
- Sixty significant single nucleotide polymorphisms (SNPs) across 21 genomic regions were associated with seven bacterial genera (Acinetobacter, Bacillus, Clostridium, Flavobacterium, Prevotella, Pseudomonas, Streptobacillus).
- Eighty-four candidate genes were identified, primarily involved in immunity, metabolism, and signal transduction.
- These findings highlight a genetic basis for variations in rumen microbial communities.
Conclusions:
- Host genetics play a significant role in shaping the rumen microbiome in sheep.
- Identified candidate genes may modulate rumen microbial composition, impacting host health.
- Further research into host-microbe interactions is essential for advancing sheep health management.
