| Titre : |
Ecological hybrid speciation in central-European species of Bolboschoenus : genetic and morphological evaluation |
| Type de document : |
texte imprimé |
| Auteurs : |
Sona Pisova, Auteur ; Zdenka Hroudová, Auteur ; Zuzana Chumova, Auteur ; Tomas Fer, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
pp. 17-39 |
| Langues : |
Anglais (eng) |
| Catégories : |
[Espèces (in biblio)] Bolboschoenus
[ZG] Europe centrale
|
| Mots-clés : |
spéciation hybride morphologie génétique |
| Résumé : |
"Divergent natural selection is known to facilitate speciation in many taxa. The genus Bolboschoenus (Cyperaceae) is a model group for investigating ecological and homoploid hybrid speciation. Four taxa of Bolboschoenus occur in central Europe: the halophyte B. maritimus and glycophytes B. laticarpus, B. planiculmis and B. yagara. These species differ in their ecological niches. Such ecological and/or geographical isolation is critical for homoploid hybrid speciation. The determination of species of Bolboschoenus is based on morphological characters of the inflorescence and on achene shape and anatomy. On the basis of its intermediate morphology, chromosome number and ecological amplitude B. laticarpus is thought to be a hybrid. In order to determine the validity of morphological species and the possible hybrid origin of B. laticarpus we used amplified fragment length polymorphisms (AFLPs) as molecular markers and compared different genetic groups defined using STRUCTURE analysis with morphological data. The morphological classification of central-European species of Bolboschoenus was confirmed. Plants of heterogeneous genotypes were also found to be intermediate individuals resulting from spontaneous hybridization. Hybrid origin of B. laticarpus, which is genetically and morphologically intermediate between B. yagara and B. planiculmis, was elucidated. Inflorescence characters were less important for determining species than anatomical characters of achenes (widths of the exocarp and mesocarp)." (source : auteurs) |
| Type de publication : |
périodique |
| Référence biblio : |
Pisova S., Hroudová Z., Chumova Z., Fer T., 2017 - Ecological hybrid speciation in central-European species of Bolboschoenus : genetic and morphological evaluation. Preslia, 89 : 17-39. |
| ID PMB : |
69472 |
| DOI : |
10.23855/PRESLIA.2017.017 |
| En ligne : |
http://www.preslia.cz/P171Pisova.pdf |
| Format de la ressource électronique : |
document |
| Permalink : |
http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69472 |
in Preslia > vol. 89 (Année 2017) . - pp. 17-39
trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Affiner la rechercheEcological hybrid speciation in central-European species of Bolboschoenus : genetic and morphological evaluation / Sona Pisova in Preslia, vol. 89 (Année 2017)
