Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

 

Publications des scientifiques de l'IRD

Turner B., Paun O., Munzinger Jérôme, Duangjai S., Chase M.W., SamuelR. (2013). Analyses of amplified fragment length polymorphisms (AFLP) indicate rapid radiation of Diospyros species (Ebenaceae) endemic to New Caledonia. BMC Evolutionary Biology, 13, no 269 [15 p. en ligne] ISSN 1471-2148

Fichier PDF disponiblehttp://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers14-02/010060306.pdf[ PDF Link ]

Lien direct chez l'éditeur doi:10.1186/1471-2148-13-269

Titre
Analyses of amplified fragment length polymorphisms (AFLP) indicate rapid radiation of Diospyros species (Ebenaceae) endemic to New Caledonia
Année de publication2013
Type de documentArticle
AuteursTurner B., Paun O., Munzinger Jérôme, Duangjai S., Chase M.W., SamuelR.
SourceBMC Evolutionary Biology, 2013, 13, no 269 [15 p. en ligne] ISSN 1471-2148
RésuméBackground : Radiation in some plant groups has occurred on islands and due to the characteristic rapid pace of phenotypic evolution, standard molecular markers often provide insufficient variation for phylogenetic reconstruction. To resolve relationships within a clade of 21 closely related New Caledonian Diospyros species and evaluate species boundaries we analysed genome-wide DNA variation via amplified fragment length polymorphisms (AFLP). Results : A neighbour-joining (NJ) dendrogram based on Dice distances shows all species except D. minimifolia,D. parviflora and D. vieillardii to form unique clusters of genetically similar accessions. However, there was little variation between these species clusters, resulting in unresolved species relationships and a star-like general NJ topology. Correspondingly, analyses of molecular variance showed more variation within species than between them. A Bayesian analysis with BEAST produced a similar result. Another Bayesian method, this time a clustering method, STRUCTURE, demonstrated the presence of two groups, highly congruent with those observed in a principal coordinate analysis (PCO). Molecular divergence between the two groups is low and does not correspond to any hypothesised taxonomic, ecological or geographical patterns. Conclusions : We hypothesise that such a pattern could have been produced by rapid and complex evolution involving a widespread progenitor for which an initial split into two groups was followed by subsequent fragmentation into many diverging populations, which was followed by range expansion of then divergent entities. Overall, this process resulted in an opportunistic pattern of phenotypic diversification. The time since divergence was probably insufficient for some species to become genetically well-differentiated, resulting in progenitor/derivative relationships being exhibited in a few cases. In other cases, our analyses may have revealed evidence for the existence of cryptic species, for which more study of morphology and ecology are now required.
Plan de classementAmélioration génétique [076AMEPLA04]
DescripteursARBRE ; ESPECE ENDEMIQUE ; PHYLOGENIE ; EVOLUTION ; ILE ; RELATION INTERSPECIFIQUE ; ETUDE EXPERIMENTALE ; ETUDE COMPARATIVE ; GENOME ; ANALYSE AFLP
Descr. géo.NOUVELLE CALEDONIE
LocalisationFonds IRD [F B010060306]
Identifiant IRDfdi:010060306
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010060306

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


* PDF Link :

    à télécharger pour citer/partager ce document sur les réseaux sociaux académiques


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito