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dc.contributor.authorSegarra-Moragues, José G.-
dc.contributor.authorCatalán, Pilar-
dc.date.accessioned2012-10-28T11:42:26Z-
dc.date.available2012-10-28T11:42:26Z-
dc.date.issued2008-11-
dc.identifier.citationPlant Ecology and Diversity 1(2): 229-243 (2008)es_ES
dc.identifier.issn1755-0874-
dc.identifier.urihttp://hdl.handle.net/10261/59007-
dc.description16 paginas, 5 figuras, 4 tablas.es_ES
dc.description.abstractBackground: Borderea is a relict genus in the Pyrenees comprising only two extant allopolyploid species. The pre-Pyrenean, cliff-dweller B. chouardii is confined to a single critically endangered population, whereas the subalpine B. pyrenaica is more widely distributed in the mobile scree-habitats of the central Pyrenees and pre-Pyrenees. Aims: To determine the genetic structure and relationships among individuals and populations of both taxa to understand their origin. To compare two alternative evolutionary models, the Infinite Allele Model (IAM) and the Stepwise Mutation Model (SMM), in an examination of the primary factors responsible for population divergence during the Quaternary. Methods: A survey of nuclear microsatellite (Simple Sequence Repeat, SSR) variation was conducted to infer relationships among allelic phenotypes and genotypes and to evaluate the relative contributions of migration and mutation to population genetic structure. Results: The occurrence of shared ancestral alleles among populations of both Borderea species supported a presumably late-Tertiary divergence of the species in the low-altitudinal pre-Pyrenees. Borderea chouardii exhibited strong genetic differentiation between two sub-populations separated by only 150 m of vertical distance. In B. pyrenaica, populations from the pre-Pyrenees and southern Pyrenees showed greater genetic differentiation and more allelic diversity relative to populations from the northern Pyrenees. Conclusions: These results suggest that B. pyrenaica experienced glacial survival in warm southern pre-Pyrenean refugia followed by rapid postglacial migration towards the northern Pyrenees. Despite the a priori high suitability of the SMM for microsatellite markers, genotypic relationships among individuals and populations and genotypic assignments to predefined groups of B. pyrenaica were always better resolved by the IAM than by the SMM. This points towards the overwhelming influence of migration and genetic drift over mutation in the Quaternary history of the B. pyrenaica populations. However, for B. chouardii a similar pattern was shown by both evolutionary models, suggesting that sub-population divergence of this species could have also been favoured by mutation.es_ES
dc.description.sponsorshipWe are indebted to Prof. R.J. Abbott and two anonymous referees for their valuable comments that have greatly improved the quality of the manuscript. We are also grateful to the authorities of the Spanish Government of Aragón and the French National Park of the Pyrenees for allowing sampling of Borderea populations and for previous financial support. This work was supported by the Spanish Fundación BBVA grant BIOCON05/093. JGSM was also supported from an Agencia Aragonesa para la Invesigación y el Desarrollo (ARAID) postdoctoral contract.es_ES
dc.language.isoenges_ES
dc.publisherTaylor & Francises_ES
dc.rightsclosedAccesses_ES
dc.subjectBorderea chouardiies_ES
dc.subjectB. pyrenaicaes_ES
dc.subjectGenetic structurees_ES
dc.subjectIAMes_ES
dc.subjectMicrosatelliteses_ES
dc.subjectPopulation historyes_ES
dc.subjectSMMes_ES
dc.titleGlacial survival, phylogeography, and a comparison of microsatellite evolution models for resolving population structure in two species of dwarf yams (Borderea, Dioscoreaceae) endemic to the central Pyreneeses_ES
dc.typeartículoes_ES
dc.identifier.doi10.1080/17550870802349757-
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1080/17550870802349757es_ES
dc.identifier.e-issn1755-1668-
dc.contributor.funderFundación BBVA-
dc.contributor.funderFundación Agencia Aragonesa para la Investigación y el Desarrollo-
dc.identifier.funderhttp://dx.doi.org/10.13039/100007406es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100008767es_ES
dc.type.coarhttp://purl.org/coar/resource_type/c_6501es_ES
item.openairetypeartículo-
item.cerifentitytypePublications-
item.languageiso639-1en-
item.grantfulltextnone-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.fulltextNo Fulltext-
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