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Assessing patterns of geographic dispersal of Gelidium sesquipedale (Rhodophyta) through RAPD differentiation of populations

1999Journal article Open Access
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dc.contributor.authorAlberto, F.
dc.contributor.authorSantos, Rui
dc.contributor.authorLeitão, J. M.
dc.date.accessioned2015-06-19T14:36:26Z
dc.date.available2015-06-19T14:36:26Z
dc.date.issued1999
dc.description.abstractRandomly amplified polymorphic DNAs (RAPDs) of bulked genomic DNA samples were used to analyse the genetic differentiation of Gelidium sesquipedale populations. They reflect the pat terns of gene flow, which in turn depend on the dispersal mechanisms of the species and on near-shore ocean currents. Fourteen populations were sampled from northern France to Morocco, covering the geographical distribution of the species. A single bulk DNA sample (from 15 individuals) was used in each population, under the assumption that the resulting patterns represent the populations' most common genetic features. To test this, we investigated the genetic variability among 5 bulk samples within a single population. Genetic distances among bulks were very low (average = 0.065) and were signifi- cantly lower than those observed between geographically separated populations (average = 0.241). Neighbour-joining analysis of the distance matrix of populations separated a well-supported group including populations of northern Spain and of northern France, and a less-supported group containing populations of northern Portugal. Multidimensional scaling of the genetic distance matrix revealed 2 isolated populations, Sao Rafael in southern Portugal and Algeciras in southern Spain. These patterns of genetic differentiation are discussed under the available data on the near-shore ocean currents. Results suggest that the genetic differentiation of G. sesquipedale populations may be used as a biological tracer of prevailing flows and barriers of the near-shore currents. A positive correlation between geographical and genetic distances of G. sesquipedale populations along the species geographical dis tribution was found, suggesting that a continuous transport of detached fronds and their reattachment to new substrate must be an effective dispersal mechanism of the species, sustaining the gene flow among populations.
dc.identifier.doihttps://dx.doi.org/10.3354/meps191101
dc.identifier.issn0171-8630
dc.identifier.otherAUT: ROS00812; JLE00446;
dc.identifier.urihttp://hdl.handle.net/10400.1/6506
dc.language.isoeng
dc.peerreviewedyes
dc.publisherInter Research
dc.relation.isbasedonP-001-5ZC
dc.titleAssessing patterns of geographic dispersal of Gelidium sesquipedale (Rhodophyta) through RAPD differentiation of populations
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage108
oaire.citation.startPage101
oaire.citation.titleMarine Ecology Progress Series
oaire.citation.volume191
person.familyNameAlberto
person.familyNameSantos
person.familyNameLeitão
person.givenNameFilipe
person.givenNameRui
person.givenNameJosé
person.identifier1488456
person.identifier42560
person.identifier258398
person.identifier.ciencia-idBD15-2AC7-8AA3
person.identifier.ciencia-id9B18-444D-2244
person.identifier.ciencia-id7A17-3E0A-73AD
person.identifier.orcid0000-0003-0593-3240
person.identifier.orcid0000-0002-7861-4366
person.identifier.orcid0000-0003-4278-0415
person.identifier.ridB-4168-2008
person.identifier.ridAAH-3958-2020
person.identifier.scopus-author-id6701653422
person.identifier.scopus-author-id7201375018
person.identifier.scopus-author-id7005119796
rcaap.rightsopenAccess
rcaap.typearticle
relation.isAuthorOfPublication4e95893d-e3c7-462f-a897-49bb8999b65b
relation.isAuthorOfPublication84487ca8-404a-4584-81f0-3662c340d712
relation.isAuthorOfPublication0f990d1c-2913-4f8a-8fb6-f8b02721247f
relation.isAuthorOfPublication.latestForDiscovery84487ca8-404a-4584-81f0-3662c340d712

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