[article]
| Titre : |
Invasion dynamics of two alien Carpobrotus (Aizoaceae) taxa on a Mediterranean island : I. Genetic diversity and introgression |
| Type de document : |
texte imprimé |
| Auteurs : |
Carey Suehs, Auteur ; Laurence Affre, Auteur ; Frédéric Médail, Auteur |
| Année de publication : |
2004 |
| Article en page(s) : |
pp. 31–40 |
| Langues : |
Anglais (eng) |
| Catégories : |
[ZG] HYERES (83069)
[Espèces (in biblio)] Carpobrotus acinaciformis
[Espèces (in biblio)] Carpobrotus edulis
|
| Mots-clés : |
dynamique d'invasion hybridation diversité génétique |
| Résumé : |
"his study, based on morphological and isozyme analysis, clearly discriminates two invasive Carpobrotus taxa, C. edulis and C. acinaciformis, in the Hyères archipelago off the southeastern coast of France. However, three different allelic combinations demonstrate the presence of intermediate individuals resulting from an introgression of part of the C. edulis genome into that of C. acinaciformis. Both taxa have higher than average genetic (C. edulis: P(0.95)=62.5%, A=2.25±0.70, Ho=0.329±0.324; C. acinaciformis: P(0.95)=75%, A=2.38±0.42, Ho=0.645±0.109) and clonal diversities (C. edulis: IP=0.37; C. acinaciformis: IP=0.48). Furthermore, C. acinaciformis has an excess of heterozygotes (F=−0.585±0.217), probably due to introgression. The relationship between the probability of clonal identity for two individuals and distance indicates that C. acinaciformis relies more on clonal reproduction than on sexual recruitment (seed recruitment/vegetative propagation=u/v=0.027), in contrast to C. edulis, whose probability of clonal identity did not vary with distance. The overwhelming clonal growth and high genetic diversities of C. acinaciformis and the previously recorded invasion potential for C. edulis raises concern for intensified invasion via hybridisation." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Suehs C., Affre L., Médail F., 2004 - Invasion dynamics of two alien Carpobrotus (Aizoaceae) taxa on a Mediterranean island : I. Genetic diversity and introgression. Heredity, 92 (1) : 31–40. |
| ID PMB : |
69677 |
| En ligne : |
https://www.nature.com/articles/6800374 |
| Format de la ressource électronique : |
document |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69677 |
in Heredity > vol. 92, n°1 (Année 2004) . - pp. 31–40
[article]
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Partager le résultat de cette rechercheDynamique d’invasion de deux végétaux introduits dans le bassin méditerranéen, Carpobrotus spp. (Aizoaceae) sur l’île de Bagaud : hybridation, structure clonale et stratégies de reproduction in Travaux scientifiques du parc national de Port-Cros, n°20 (Année 2004)
