Proximity-dependent pollen performance in Silene vulgaris.

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Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Proximity-dependent pollen performance in Silene vulgaris.
Journal
Annals of Botany
Author(s)
Glaettli M., Pescatore L., Goudet J.
ISSN
0305-7364[print], 0305-7364[linking]
Publication state
Published
Issued date
2006
Volume
98
Number
2
Pages
431-437
Language
english
Abstract
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.
Keywords
Breeding, Genetic Markers, Microsatellite Repeats, Pollen/growth & development, Pollen/physiology, Reproduction, Silene/physiology
Pubmed
Web of science
Open Access
Yes
Create date
24/01/2008 17:10
Last modification date
20/08/2019 12:24
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