Evolutionary maintenance of genomic diversity within arbuscular mycorrhizal fungi

Scott, Thomas W.; Kiers, E. Toby; Cooper, Guy A.; dos Santos, Miguel; West, Stuart A. (2019). Evolutionary maintenance of genomic diversity within arbuscular mycorrhizal fungi. Ecology and evolution, 9(5), pp. 2425-2435. John Wiley & Sons, Inc. 10.1002/ece3.4834

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Most organisms are built from a single genome. In striking contrast, arbuscular mycorrhizal fungi appear to maintain genomic variation within an individual fungal network. Arbuscular mycorrhizal fungi dwell in the soil, form mutualistic networks with plants, and bear multiple, potentially genetically diverse nuclei within a network. We explore, from a theoretical perspective, why such genetic diversity might be maintained within individuals. We consider selection acting within and between individual fungal networks. We show that genetic diversity could provide a benefit at the level of the individual, by improving growth in variable environments, and that this can stabilize genetic diversity even in the presence of nuclear conflict. Arbuscular mycorrhizal fungi complicate our understanding of organismality, but our findings offer a way of understanding such biological anomalies.

Item Type:

Journal Article (Original Article)

Division/Institute:

07 Faculty of Human Sciences > Institute of Psychology > Social Psychology and Social Neuroscience

UniBE Contributor:

Dos Santos, Miguel

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

2045-7758

Publisher:

John Wiley & Sons, Inc.

Language:

English

Submitter:

Miguel Dos Santos

Date Deposited:

25 Apr 2019 11:06

Last Modified:

23 Oct 2019 11:54

Publisher DOI:

10.1002/ece3.4834

BORIS DOI:

10.7892/boris.126507

URI:

https://boris.unibe.ch/id/eprint/126507

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