Sophie Launey
IFREMER
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Publication
Featured researches published by Sophie Launey.
Genetics Research | 2001
Sophie Launey; Marc Barre; Andre Gerard; Yamama Naciri-Graven
Genetic variability at five microsatellite loci was analysed in three hatchery-propagated populations of the flat oyster, Ostrea edulis. These populations were part of a selection programme for resistance to the protozoan parasite Bonamia ostreae and were produced by mass spawns, without control of the genealogy. Evidence for population bottlenecks and inbreeding was sought. A reduction in the number of alleles, mainly due to the loss of rare alleles, was observed in all selected populations, relative to the natural population from which they were derived. Heterozygote excesses were observed in two populations, and were attributed to substructuring of the population into a small number of families. Pedigree reconstruction showed that these two populations were produced by at most two spawning events involving a limited number of parents. Most individuals within these populations are half or full-sib, as shown by relatedness coefficients. The occurrence of population bottlenecks was supported by estimates of effective number of breeders derived by three methods: temporal variance in allelic frequencies, heterozygote excess, and a new method based on reduction in the number of alleles. The estimates from the different methods were consistent. The evidence for bottleneck and small effective number of breeders are expected to lead to increasing inbreeding, and have important consequences for the future management of the three O. edulis selected populations.
Genetics | 1998
Nicolas Bierne; Sophie Launey; Yamama Naciri-Graven; François Bonhomme
Genetics Research | 2000
Yamama Naciri-Graven; Sophie Launey; Nicolas Lebayon; Andre Gerard; Jean-Pierre Baud
Groupe de travail sur la Reproduction des Mollusques. Bivalves Aquaculture Marine | 1995
Andre Gerard; Yamama Naciri-Graven; Pierre Boudry; Sophie Launey; Serge Heurtebise; Christophe Ledu; Pascal Phelipot
international conference on evolvable systems | 2002
Pierre Boudry; Sophie Launey; E. Diaz-Almela; Yamama Naciri-Graven; Christophe Ledu; Sara Mira; Nicolas Taris; François Bonhomme; Sylvie Lapegue
World Aquaculture Society | 2000
Sylvie Lapegue; E. Diaz-Almela; Sophie Launey; Christophe Ledu; Pierre Boudry; Yamama Naciri-Graven; François Bonhomme
Wokshop Dispersion larvaire et conséquences sur la variabilité génétique spatiale et temporelle du recrutement en milieu marin. Programme National sur le Déterminisme du Recrutement PNDR | 1998
Pierre Boudry; Sophie Launey; Arnaud Huvet
Journées Conchylicoles Ifremer 1997 | 1997
Marc Barre; Yamama Naciri; Pierre Boudry; Emmanuel Goyard; Sophie Launey; Nathalie Cochennec; Serge Heurtebise; Christophe Ledu; Pascal Phelipot; Andre Gerard
In : Les mollusqus dans la recherche actuelle | 2003
Pierre Boudry; Sophie Launey; A. Diaz-Almela; Yamama Naciri-Graven; Christophe Ledu; Sara Mira; Nicolas Taris; François Bonhomme; Sylvie Lapegue
Journées Conchylicoles Ifremer 2001 | 2001
Sylvie Lapegue; E. Diaz-Almela; Sophie Launey; Christophe Ledu; Pierre Boudry; Yamama Naciri-Graven; François Bonhomme