Digest: Exposing the role of rare alleles in inbreeding depression in monkeyflower

Outcrossing is maintained in many hermaphroditic species despite theoretical work suggesting that alleles increasing selfing should invade outcrossing populations. Brown and Kelly (2019) identify reasons why this may not have occurred in an outcrossing population of monkeyflower, namely that inbreed...

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Bibliographic Details
Published in:Evolution 2020-03, Vol.74 (3), p.688-689
Main Author: Hudson, Asher I.
Format: Article
Language:English
Subjects:
Alleles
DIGESTS
Fitness
Genetic load
Hermaphroditism
Inbreeding
Inbreeding depression
Mimulus guttatus
Population genetics
Reproductive fitness
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Summary:Outcrossing is maintained in many hermaphroditic species despite theoretical work suggesting that alleles increasing selfing should invade outcrossing populations. Brown and Kelly (2019) identify reasons why this may not have occurred in an outcrossing population of monkeyflower, namely that inbreeding depression causes strong reductions in fitness, resulting in selection for the maintenance of outcrossing. They find that genetic load imposed by rare alleles is inversely correlated with fitness-associated traits, providing evidence that recessive, deleterious alleles contribute to inbreeding depression.
ISSN:0014-3820
1558-5646
DOI:10.1111/evo.13931