Decay of Sexual Trait Genes in an Asexual Parasitoid Wasp.

Détails

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Etat: Public
Version: Final published version
ID Serval
serval:BIB_7FF1812BF75B
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Decay of Sexual Trait Genes in an Asexual Parasitoid Wasp.
Périodique
Genome Biology and Evolution
Auteur(s)
Kraaijeveld K., Anvar S.Y., Frank J., Schmitz A., Bast J., Wilbrandt J., Petersen M., Ziesmann T., Niehuis O., de Knijff P., den Dunnen J.T., Ellers J.
ISSN
1759-6653 (Electronic)
ISSN-L
1759-6653
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
8
Numéro
12
Pages
3685-3695
Langue
anglais
Résumé
Trait loss is a widespread phenomenon with pervasive consequences
for a species’ evolutionary potential. The genetic changes
underlying trait loss have only been clarified in a small number of cases. None of these studies can identify whether the loss of the trait
under study was a result of neutral mutation accumulation or negative selection. This distinction is relatively clear-cut in the loss of
sexual traits in asexual organisms. Male-specific sexual traits are not expressed and can only decay through neutral mutations,
whereas female-specific traits are expressed and subject to negative selection. We present the genome of an asexual parasitoid
wasp and compare it to that of a sexual lineage of the same species.
We identify a short-list of 16 genes for which the asexual lineage
carries deleterious SNP or indel variants, whereas the sexual lineag
e does not. Using tissue-specific expression data from other insects,
we show that fifteen of these are expressed in male-specific reproductive tissues. Only one deleterious variant was found that is
expressed in the female-specific spermathecae, a trait that is
heavily degraded and thought to be under negative selection in
L. clavipes
. Although the phenotypic decay of male-specific sexual traits in asexuals is generally slow compared with the decay of
female-specific sexual traits, we show that male-specific traits do indeed accumulate deleterious mutations as expected by theory.
Our results provide an excellent starting point for detailed s
tudy of the genomics of neutral and selected trait decay.
Mots-clé
Leptopilina clavipes, Wolbachia, parthenogenesis, deleterious variants, sexual trait decay
Pubmed
Web of science
Open Access
Oui
Création de la notice
14/02/2017 10:34
Dernière modification de la notice
20/08/2019 14:40
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