Evolutionary implications of a high selfing rate in the freshwater snail Lymnaea truncatula.

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Serval ID
serval:BIB_393B33A0BFD7
Type
Article: article from journal or magazin.
Collection
Publications
Title
Evolutionary implications of a high selfing rate in the freshwater snail Lymnaea truncatula.
Journal
Evolution
Author(s)
Trouvé S., Degen L., Renaud F., Goudet J.
ISSN
0014-3820[print], 0014-3820[linking]
Publication state
Published
Issued date
2003
Volume
57
Number
10
Pages
2303-2314
Language
english
Abstract
Self-compatible hermaphroditic organisms that mix self-fertilization and outcrossing are of great interest for investigating the evolution of mating systems. We investigate the evolution of selfing in Lymnaea truncatula, a self-compatible hermaphroditic freshwater snail. We first analyze the consequences of selfing in terms of genetic variability within and among populations and then investigate how these consequences along with the species ecology (harshness of the habitat and parasitism) might govern the evolution of selfing. Snails from 13 localities (classified as temporary or permanent depending on their water availability) were sampled in western Switzerland and genotyped for seven microsatellite loci. F(IS) (estimated on adults) and progeny array analyses (on hatchlings) provided similar selfing rate estimates of 80%. Populations presented a low polymorphism and were highly differentiated (F(ST) = 0.58). Although the reproductive assurance hypothesis would predict higher selfing rate in temporary populations, no difference in selfing level was observed between temporary and permanent populations. However, allelic richness and gene diversity declined in temporary habitats, presumably reflecting drift. Infection levels varied but were not simply related to either estimated population selfing rate or to differences in heterozygosity. These findings and the similar selfing rates estimated for hatchlings and adults suggest that within-population inbreeding depression is low in L. truncatula.
Keywords
Alleles, Animals, Ecology, Environment, Evolution, Fresh Water, Genetic Variation, Inbreeding, Microsatellite Repeats, Reproduction/physiology, Snails/genetics, Snails/parasitology, Switzerland
Pubmed
Web of science
Open Access
Yes
Create date
24/01/2008 18:10
Last modification date
20/08/2019 14:28
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