Proximity-dependent pollen performance in Silene vulgaris.

Détails

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Etat: Public
Version: de l'auteur
ID Serval
serval:BIB_01DF9980EA20
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Proximity-dependent pollen performance in Silene vulgaris.
Périodique
Annals of Botany
Auteur(s)
Glaettli M., Pescatore L., Goudet J.
ISSN
0305-7364[print], 0305-7364[linking]
Statut éditorial
Publié
Date de publication
2006
Volume
98
Numéro
2
Pages
431-437
Langue
anglais
Résumé
BACKGROUND AND AIMS: Pollen and seed dispersal in herbaceous insect-pollinated plants are often restricted, inducing strong population structure. To what extent this influences mating within and among patches is poorly understood. This study investigates the influence of population structure on pollen performance using controlled pollinations and genetic markers. METHODS: Population structure was investigated in a patchily distributed population of gynodioecious Silene vulgaris in Switzerland using polymorphic microsatellite markers. Experimental pollinations were performed on 21 hermaphrodite recipients using pollen donors at three spatial scales: (a) self-pollination; (b) within-patch cross-pollinations; and (c) between-patch cross-pollinations. Pollen performance was then compared with respect to crossing distance. KEY RESULTS: The population of S. vulgaris was characterized by a high degree of genetic sub-structure, with neighbouring plants more related to one another than to distant individuals. Inbreeding probably results from both selfing and biparental inbreeding. Pollen performance increased with distance between mates. Between-patch pollen performed significantly better than both self- and within-patch pollen donors. However, no significant difference was detected between self- and within-patch pollen donors. CONCLUSIONS: The results suggest that population structure in animal-pollinated plants is likely to influence mating patterns by favouring cross-pollinations between unrelated plants. However, the extent to which this mechanism could be effective as a pre-zygotic barrier preventing inbred mating depends on the patterns of pollinator foraging and their influence on pollen dispersal.
Mots-clé
Breeding, Genetic Markers, Microsatellite Repeats, Pollen/growth & development, Pollen/physiology, Reproduction, Silene/physiology
Pubmed
Web of science
Open Access
Oui
Création de la notice
24/01/2008 17:10
Dernière modification de la notice
20/08/2019 12:24
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