- THIS ARTICLE
- Full Text (PDF)
- Alert me when this article is cited
- Alert me if a correction is posted
- SERVICES
- Similar articles in this journal
- Similar articles in PubMed
- Alert me to new issues of the journal
- Download to citation manager
- Reprints & Permissions
- CITING ARTICLES
- Citing Articles via HighWire
- Citing Articles via Google Scholar
- GOOGLE SCHOLAR
- Articles by Viard, F.
- Articles by Jarne, P.
- Search for Related Content
- PUBMED
- PubMed Citation
- Articles by Viard, F.
- Articles by Jarne, P.
Genetics, Vol 146, 973-982, Copyright © 1997
INVESTIGATIONS |
Population Dynamics Inferred From Temporal Variation at Microsatellite Loci in the Selfing Snail Bulinus truncatus
F. Viard, F. Justy and P. Jarne
Institut des Sciences de l'Evolution, Universite Montpellier II, 34095 Montpellier Cedex 05, France
We analyzed short-term forces acting on the genetics of subdivided populations based on a temporal survey of the microsatellite variability in the hermaphrodite freshwater snail Bulinus truncatus. This species inhabits temporary habitats, has a short generation time and exhibits variable rates of selfing. We studied the variability over three sampling dates in 12 Sahelian populations (1161 individuals). Classical genetic parameters (estimators of H(o), H(e), f, selfing rate and Fst) showed limited change over time whereas important temporal changes of allelic frequencies were detected for 10 of the ponds studied. These variations are not easily explained by selection, sampling drift and genetic drift alone and may be due to periodic migration. Indeed the habitats occupied by the populations studied are subject to large temporal fluctuations owing to annual cycles of drought and flood. In such ponds our results support a demographic model of population expansions and contractions under which available habitats, after the rainy season, are colonized by individuals originating from a smaller number of refuges (areas that never dry out in the deepest parts of the ponds). In contrast, selfing appeared to be an important force affecting the genetic structure in permanent ponds.
This article has been cited by other articles:
 |
|
 |
|
  A. Barriere and M.-A. Felix Temporal Dynamics and Linkage Disequilibrium in Natural Caenorhabditis elegans Populations Genetics, June 1, 2007; 176(2): 999 - 1011. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Enjalbert and J. L. David Inferring Recent Outcrossing Rates Using Multilocus Individual Heterozygosity: Application to Evolving Wheat Populations Genetics, December 1, 2000; 156(4): 1973 - 1982. [Abstract] [Full Text]
|
|