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ID: 334262.0, MPI für Evolutionsbiologie / Ecophysiology
Genome scans detect consistent divergent selection among subtidal vs. intertidal populations of the marine angiosperm Zostera marina
Authors:Oetjen, Katharina; Reusch, Thorsten B. H.
Language:English
Date of Publication (YYYY-MM-DD):2007
Title of Journal:Molecular Ecology
Volume:16
Issue / Number:24
Start Page:5156
End Page:5167
Review Status:not specified
Audience:Not Specified
Abstract / Description:Genome scans are a powerful tool to detect natural selection in natural populations among a larger sample of marker loci. We used replicated habitat comparisons to search for consistent signals of selection among contrasting populations of the seagrass Zostera marina, a marine flowering plant with important ecological functions. We compared two different habitat types in the North Frisian Wadden Sea, either permanently submerged (subtidal) or subjected to aerial exposure (intertidal). In three independent population pairs, each consisting of one tidal creek and one tidal flat population each, we carried out a genome scan with 14 expressed sequence tag (EST)-derived microsatellites situated in 5'- or 3'-untranslated regions of putative genes, in addition to 11 anonymous genomic microsatellites. By using two approaches for outlier identification, one anonymous and two EST-derived microsatellites showed population differentiation patterns not consistent with neutrality. These microsatellites were detected in several parallel population comparisons, suggesting that they are under diverging selection. One of these loci is linked to a putative nodulin gene, which is responsible for water channelling across cellular membranes, suggesting a functional link of the observed genetic divergence with habitat characteristics.
Free Keywords:divergent selection; EST; genome scan; microsatellite; seagrass; Zostera marina
External Publication Status:published
Document Type:Article
Affiliations:MPI für Limnologie/Abt. Ökophysiologie
External Affiliations:Univ Münster, D-48149 Münster, Germany
Identifiers:ISSN:0962-1083 [ID-No:1]
DOI:10.1111/j.1365-294X.2007.03577.x [ID-No:2]
LOCALID:2592/S 38753 [Listen-Nummer/S-Nummer]
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