The influence of host genetics on the microbiome

Area of Science:

• Microbiology
• Genetics
• Ecology

Background:

• Host genetics are known to influence susceptibility to pathogens and symbiont associations.
• The precise impact of host genes on the overall structure and composition of microbial communities remains incompletely understood.
• Existing studies show host genes affect species richness and individual microbial taxa abundance, but less so beta diversity.

Purpose of the Study:

• To review current research on factors shaping host-associated microbial communities.
• To critically assess the influence of host genetics on microbiome structure and diversity.
• To investigate whether chosen research metrics impact conclusions about host-microbiome interactions.

Main Methods:

• Literature review of recent studies investigating host microbiome assembly.
• Analysis of findings related to host genetic effects on microbial species richness and taxon abundance.
• Examination of studies focusing on beta diversity and overall community similarity.

Main Results:

• Host genetics demonstrably impact species richness and the abundance of specific microbial taxa within host-associated communities.
• Analyses of beta diversity often suggest a limited role for host genes in shaping overall microbial community structure.
• Discrepancies in findings may arise from the specific community traits examined.

Conclusions:

• Host genes play a significant role in shaping specific aspects of the microbiome, particularly species richness and taxon abundance.
• The perceived influence of host genetics on overall microbial community similarity (beta diversity) may be underestimated or dependent on measurement methods.
• Further research is needed to reconcile these findings and understand how host traits influence microbiome assembly and function.