Nonrandom associations of maternally transmitted symbionts in insects: The roles of drift versus biased cotransmission and selection

Autor: Hugo Mathé-Hubert, Christoph Vorburger, John Jaenike, Corinne Hertaeg, Heidi Kaech
Přispěvatelé: Swiss Federal Insitute of Aquatic Science and Technology [Dübendorf] (EAWAG), Institute of Integrative Biology, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich)
Rok vydání: 2019
Předmět:
0106 biological sciences
0301 basic medicine
animal structures
Gene Transfer
Horizontal
Spiroplasma
Field data
010603 evolutionary biology
01 natural sciences
03 medical and health sciences
[SDV.EE.ECO]Life Sciences [q-bio]/Ecology
environment/Ecosystems
Genetics
Animals
Symbiosis
ComputingMilieux_MISCELLANEOUS
Phylogeny
Ecology
Evolution
Behavior and Systematics
biology
[SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE]
Microbiota
fungi
food and beverages
Bayes Theorem
biochemical phenomena
metabolism
and nutrition
biology.organism_classification
Field survey
Acyrthosiphon pisum
030104 developmental biology
Evolutionary biology
Aphids
bacteria
Drosophila
Wolbachia
Maternal Inheritance
Approximate Bayesian computation
Null hypothesis
Drosophila neotestacea
[SDV.EE.IEO]Life Sciences [q-bio]/Ecology
environment/Symbiosis
Zdroj: Molecular Ecology
Molecular Ecology, Wiley, 2019, 28 (24), pp.5330-5346. ⟨10.1111/mec.15206⟩
ISSN: 1365-294X
0962-1083
Popis: Virtually all higher organisms form holobionts with associated microbiota. To understand the biology of holobionts we need to know how species assemble and interact. Controlled experiments are suited to study interactions between particular symbionts, but they only accommodate a tiny portion of the diversity within each species. Alternatively, interactions can be inferred by testing if associations among symbionts in the field are more or less frequent than expected under random assortment. However, random assortment may not be a valid null hypothesis for maternally transmitted symbionts since drift alone can result in associations. Here, we analyse a European field survey of endosymbionts in pea aphids (Acyrthosiphon pisum), confirming that symbiont associations are pervasive. To interpret them, we develop a model simulating the effect of drift on symbiont associations. We show that drift induces apparently nonrandom assortment, even though horizontal transmissions and maternal transmission failures tend to randomise symbiont associations. We also use this model in the approximate Bayesian computation framework to revisit the association between Spiroplasma and Wolbachia in Drosophila neotestacea. New field data reported here reveal that this association has disappeared in the investigated location, yet a significant interaction between Spiroplasma and Wolbachia can still be inferred. Our study confirms that negative and positive associations are pervasive and often induced by symbiont-symbiont interactions. Nevertheless, some associations are also likely to be driven by drift. This possibility needs to be considered when performing such analyses, and our model is helpful for this purpose.
Databáze: OpenAIRE
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