Too big to purge: persistence of deleterious Mutations in Island populations of the European Barn Owl (Tyto alba).

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State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_8F26100816A9
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Too big to purge: persistence of deleterious Mutations in Island populations of the European Barn Owl (Tyto alba).
Journal
Heredity
Author(s)
Lavanchy E., Cumer T., Topaloudis A., Ducrest A.L., Simon C., Roulin A., Goudet J.
ISSN
1365-2540 (Electronic)
ISSN-L
0018-067X
Publication state
Published
Issued date
13/10/2024
Peer-reviewed
Oui
Language
english
Notes
Publication types: Journal Article
Publication Status: aheadofprint
Abstract
A key aspect of assessing the risk of extinction/extirpation for a particular wild species or population is the status of inbreeding, but the origin of inbreeding and the current mutational load are also two crucial factors to consider when determining survival probability of a population. In this study, we used samples from 502 barn owls from continental and island populations across Europe, with the aim of quantifying and comparing the level of inbreeding between populations with differing demographic histories. In addition to comparing inbreeding status, we determined whether inbreeding is due to non-random mating or high co-ancestry within the population. We show that islands have higher levels of inbreeding than continental populations, and that this is mainly due to small effective population sizes rather than recent consanguineous mating. We assess the probability that a region is autozygous along the genome and show that this probability decreased as the number of genes present in that region increased. Finally, we looked for evidence of reduced selection efficiency and purging in island populations. Among island populations, we found an increase in numbers of both neutral and deleterious minor alleles, possibly as a result of drift and decreased selection efficiency but we found no evidence of purging.
Pubmed
Open Access
Yes
Create date
16/10/2024 20:52
Last modification date
15/11/2024 20:26
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