Hologenomics is the omics study of hologenomes. A hologenome is the whole set of genomes of a holobiont, an organism together with all co-habitating microbes, other life forms, and viruses.[1] While the term hologenome originated from the hologenome theory of evolution, which postulates that natural selection occurs on the holobiont level,[2] hologenomics uses an integrative framework to investigate interactions between the host and its associated species. Examples include gut microbe[3] or viral[4] genomes linked to human or animal genomes for host-microbe interaction research.[5] Hologenomics approaches have also been used to explain genetic diversity in the microbial communities of marine sponges.[6]
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