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GENETIC ISOLATION BETWEEN THREE CLOSELY RELATED TAXA: FUCUS VESICULOSUS, F. SPIRALIS , AND F. CERANOIDES (PHAOPHYCEAE) 1
Author(s) -
Billard Emmanuelle,
Daguin Claire,
Pearson Gareth,
Serrão Ester,
Engel Carolyn,
Valero Myriam
Publication year - 2005
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.0022-3646.2005.04221.x
Subject(s) - fucus vesiculosus , biology , microsatellite , taxon , locus (genetics) , phylogenetic tree , reproductive isolation , isolation by distance , ecology , allele , zoology , evolutionary biology , algae , genetics , population , gene , sociology , demography
All traditional markers, both phenotypic and phylogenetic, have failed to discriminate between the taxa composing the Fucus vesiculosus L., F. spiralis L., and F. ceranoides L. species complex, particularly in Brittany (France), so we used five microsatellite markers to compare the allelic frequencies of populations of the three taxa in this region. The aim of this study was to assess whether the different populations were grouped according to their geographical location, their habitat (open coast versus estuary), or their a priori taxonomic assignment. Species‐specific alleles were identified at one locus, demonstrating the utility of microsatellite markers for recognizing the three taxa in Brittany. Moreover, our results clearly support the separation of F . vesiculosus , F. spiralis , and F. ceranoides into distinct species, independently of geography. We also identified genetic differentiation between estuarine and coastal populations of F. vesiculosus .