Abstract
We have studied genome reduction within several strains of the insect symbiontAsaiaisolated from different species/strains of mosquito and medfly. Phylogenetically distant strains ofAsaia, despite following a common pattern involving the loss of genes related to genome stability, have undergone independent genome reductions, highlighting the peculiar role of specific metabolic pathways in the symbiotic relationship betweenAsaiaand its host.
Highlights
The mosquito microbiota is composed of several lineages of microorganisms whose ecological roles and evolutionary histories have yet to be investigated in depth
Asaia was proposed as a novel model to investigate genome reduction; we approach this phenomenon within a single bacterial taxon that includes both environmental and insect-associated strains or species
Our results revealed substantial changes in genomic content across different Asaia lineages, showing independent genome reduction processes that occurred through a common pattern
Summary
The mosquito microbiota is composed of several lineages of microorganisms whose ecological roles and evolutionary histories have yet to be investigated in depth. Asaia was proposed as a novel model to investigate genome reduction; we approach this phenomenon within a single bacterial taxon that includes both environmental and insect-associated strains or species. We present a comprehensive comparative genomics analysis of different Asaia strains isolated from different sources, including several mosquito species, different populations of C. capitata, and environmental samples.
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