Skip to Main content Skip to Navigation
Journal articles

Spatial and temporal genetic structure of the planktonic Sagitta setosa (Chaetognatha) in European seas as revealed by mitochondrial and nuclear DNA markers

Abstract : Little is known about the spatial and temporal scales at which planktonic organisms are genetically structured. A previous study of mitochondrial DNA (mtDNA) in the holoplanktonic chaetognath Sagitta setosa revealed strong phylogeographic structuring suggesting that Northeast (NE) Atlantic, Mediterranean and Black Sea populations are genetically disjunct. The present study used a higher sampling intensity and a combination of mitochondrial and four microsatellite markers to reveal population structuring between and within basins. Between basins, both marker sets indicated significant differentiation confirming earlier results that gene flow is probably absent between the respective S. setosa populations. At the within-basin scale, we found no evidence of spatial or temporal structuring within the NE Atlantic. In the Mediterranean basin, both marker sets indicated significant structuring, but only the mtDNA data indicated a sharp genetic division between Adriatic and all other Mediterranean populations. Data were inconclusive about population structuring in the Black Sea. The levels of differentiation indicated by the two marker sets differed substantially, with far less pronounced structure detected by microsatellite than mtDNA data. This study also uncovered the presence of highly divergent mitochondrial lineages that were discordant with morphology, geography and nuclear DNA. We thus propose the hypothesis that highly divergent mitochondrial lineages may be present within interbreeding S. setosa populations.
Document type :
Journal articles
Complete list of metadatas

https://hal.ird.fr/ird-03044198
Contributor : Cecile Fauvelot <>
Submitted on : Monday, December 7, 2020 - 5:01:56 PM
Last modification on : Sunday, December 13, 2020 - 3:06:56 AM

File

Peijnenburg_etal_2006_MolEcol....
Files produced by the author(s)

Identifiers

Collections

IRD

Citation

K Peijnenburg, C Fauvelot, J Breeuwer, S Menken. Spatial and temporal genetic structure of the planktonic Sagitta setosa (Chaetognatha) in European seas as revealed by mitochondrial and nuclear DNA markers. Molecular Ecology, Wiley, 2006, 15, pp.3319 - 3338. ⟨10.1111/j.1365-294x.2006.03002.x⟩. ⟨ird-03044198⟩

Share

Metrics

Record views

11

Files downloads

30