Do discrepancies between microsatellite and allozyme variation reveal differential selection between sea and lagoon in the sea bass (Dicentrarchus labrax)?
Article first published online: 25 DEC 2001
Volume 9, Issue 4, pages 457–467, April 2000
How to Cite
Lemaire, C., Allegrucci, G., Naciri, M., Bahri-Sfar, L., Kara, H. and Bonhomme, F. (2000), Do discrepancies between microsatellite and allozyme variation reveal differential selection between sea and lagoon in the sea bass (Dicentrarchus labrax)? . Molecular Ecology, 9: 457–467. doi: 10.1046/j.1365-294x.2000.00884.x
- Issue published online: 25 DEC 2001
- Article first published online: 25 DEC 2001
- Received 24 June 1999; revision received 15 October 1999;accepted 4 November 1999
- Cited By
- Dicentrarchus labrax;
- lagoon habitat;
- sea bass;
In the present study the genetic structure of Dicentrarchus labrax (14 samples from the Mediterranean) was analysed at six microsatellite loci, in order to test the hypothesis that some enzymatic loci undergo selection between marine and lagoon habitat. Eight of the 14 samples were analysed at both microsatellite and allozyme markers. The analysis of the genetic variation among the Mediterranean samples showed that (i) FST values obtained with the six microsatellite loci were much smaller than those obtained with the 28 allozymes and (ii) microsatellite loci seemed to reflect more the geographical proximity than an ecological one. Thirteen enzymatic loci exhibited moderate to high values compared with microsatellites. This was interpreted as evidence that these allozymes are non-neutral. However, only six loci seemed to be implicated in differentiation between marine and lagoon samples, the causes of selection being unknown for the others. A possible scenario of population dynamics of the sea bass between marine and lagoon habitat is suggested.