Titre :

Sex-specific selection patterns in a dioecious insectpollinated plant

Auteur(s) :

Barbot, Estelle [Auteur correspondant]
Institut des Sciences de l'Evolution de Montpellier [UMR ISEM]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Dufaÿ, Mathilde [Auteur]
Centre d’Ecologie Fonctionnelle et Evolutive [CEFE]
De Cauwer, Isabelle [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]

Titre de la revue :

Evolution - International Journal of Organic Evolution

Pagination :

1578-1590

Éditeur :

Wiley

Date de publication :

2023

ISSN :

0014-3820

Mot(s)-clé(s) en anglais :

Floral traits
Bateman gradient
Pollinator-mediated selection
Fertility selection
Mating success
Paternity analyses

Discipline(s) HAL :

Sciences du Vivant [q-bio]

Résumé en anglais : [en]

Competition for mate acquisition is the hallmark of any sexual organism. In insect-pollinated plants, competition to attract pollinators is expected to result in pollinator-mediated selection on attractive floral traits. ...
Lire la suite >Competition for mate acquisition is the hallmark of any sexual organism. In insect-pollinated plants, competition to attract pollinators is expected to result in pollinator-mediated selection on attractive floral traits. This could overlap with sexual selection if the number of mating partners increases with pollinator attraction, resulting in an improved reproductive success. In this study, we measured a set of floral traits and estimated individual fitness in male and female Silene dioica in an experimental population. Results align with the predictions of Bateman’s principles, in the absence of pollen limitation. In females, natural selection acted on traits that are typically linked with fertility (number of flowers and number of gametes), and selection strength was similar in open- and hand-pollinated females, suggesting a limited role of pollinator-mediated selection. In males, flowering duration and corolla width were positively associated with both reproductive success and number of mates, suggesting that sexual selection has played a role in the evolution of these traits. The use of Bateman’s metrics further confirmed stronger sexual selection in males than in females. Taken together, our results shed light on the occurrence of sex-specific patterns of selection in an insect-pollinated plant population.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Collections :

• Évolution, Écologie et Paléontologie (Evo Eco Paleo) - UMR 8198

Source :

Harvested from HAL