Does natural selection explain the fine scale genetic structure at the nuclear exon Glu‐5′ in blue mussels from Kerguelen?

• DOI: 10.1002/ece3.1421
• Publication Date: 2015-03-06T05:36:12Z
• Authors: Karin Gérard; Charlotte Roby; Nicolas Bierne; Philippe Borsa; Jean‐Pierre Féral; Anne Chenuil
• Keywords: 2. Zero hunger; 0301 basic medicine; 570; 0303 health sciences; [SDV.GEN.GPO]Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE]; 550; AMOVA; F-statistics; mac-1; 03 medical and health sciences; local adaptive differentiation; [SDV.GEN.GPO] Life Sciences [q-bio]/Genetics/Populations and Evolution [q-bio.PE]; 14. Life underwater; environment; neutral structure; Original Research

The Kerguelen archipelago, isolated in the Southern Ocean, shelters a blue mussel Mytilus metapopulation far from any influence of continental populations or known hybrid zone. finely carved coast leads to highly heterogeneous habitat. We investigated impact environment on genetic structure those mussels by relating allele frequencies habitat descriptors. A total sample comprising up 2248 individuals 35 locations was characterized using two nuclear markers, mac-1 and Glu-5', mitochondrial marker (COI). frequency data 9 allozyme loci these were also reanalyzed. Two other markers (EFbis EFprem's) monomorphic. Compared Northern Hemisphere populations, polymorphism lower for all except exon Glu-5'. At differences observed between samples distinct regions (F CT = 0.077), as well within regions, including separated <500 m. No significant differentiation AMOVA analyses at (mac-1 COI). Like mac-1, genotyped previous publication, displayed (Jost's D) F ST values than Power simulations confidence intervals support that Glu-5' displays significantly higher (except single which overlap). revealed effects giant kelp Macrocystis wave exposure this marker. discuss hydrological conditions among regions. In marine organisms with high fecundity dispersal potential, gene flow tends erase differentiation, but study showed very small distance. This may be explained particular hydrology coastline together spatially variable selection