The Hologenomic Basis of Speciation: Gut Bacteria Cause Hybrid Lethality in the Genus Nasonia

Author:

Brucker Robert M.1,Bordenstein Seth R.12

Affiliation:

1. Department of Biological Sciences, Vanderbilt University, Nashville, TN 37232, USA.

2. Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN 37232, USA.

Abstract

Microbes → Host Speciation? No living organism is an individual—an individual's microbiota can outnumber the host's somatic cells. Working in parasitoid wasps, Brucker and Bordenstein (p. 667 , published online 18 July) now suggest that the gut microbiota can play a crucial role in speciation and hybrid lethality. In a clade of parasitoid wasps, interspecies hybrids survived when reared on antibiotic-treated sterile food (thus eliminating gut microbiota), but experienced high mortality when reared on conventional diet or host material.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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