The effect of pollen versus seed flow on the maintenance of nuclear-cytoplasmic gynodioecy.

Détails

ID Serval
serval:BIB_755D913609C1
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
The effect of pollen versus seed flow on the maintenance of nuclear-cytoplasmic gynodioecy.
Périodique
Evolution
Auteur⸱e⸱s
Dufay M., Pannell J.R.
ISSN
1558-5646 (Electronic)
ISSN-L
0014-3820
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
64
Numéro
3
Pages
772-784
Langue
anglais
Résumé
Gynodioecy, where females co-occur with hermaphrodites, is a relatively common sexual system in plants that is often the result of a genetic conflict between maternally inherited male sterility genes in the mitochondrial genome and the biparentally inherited male fertility restorer genes in the nucleus. Previous models have shown that nuclear-cytoplasmic gynodioecy can be maintained under certain conditions by negative frequency-dependent selection, but the effect of other evolutionary processes such as genetic drift and population subdivision is only partially understood. Here, we investigate the joint effects of frequency-dependent selection, drift, and migration through either pollen or seeds on the maintenance of nuclear-cytoplasmic gynodioecy in a subdivided population. We find that the combination of drift and selection causes the loss of gynodioecy under scenarios that would maintain it under the influence of selection alone, and that both seed and, more surprisingly, pollen flow can maintain the polymorphism. In particular, although pollen flow could not avoid the loss of cytoplasmic polymorphism within demes, it allowed the maintenance of nuclear-cytoplasmic polymorphism at the metapopulation level.
Mots-clé
Biological Evolution, Cell Nucleus/genetics, Cytoplasm/genetics, Genetic Drift, Genetics, Population, Models, Genetic, Plant Physiological Phenomena, Plants/genetics, Pollen/genetics, Reproduction/drug effects, Seeds/genetics, Selection, Genetic
Pubmed
Web of science
Création de la notice
14/09/2011 7:50
Dernière modification de la notice
20/08/2019 15:32
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