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Auteur Peter M. Hollingsworth |
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Is hybridisation with non-native congeneric species a threat to the UK native bluebell Hyacinthoides non-scripta ? / Markus Ruhsam in Plants, people, planet, vol. 5, n°6 (Année 2023)
[article]
Titre : Is hybridisation with non-native congeneric species a threat to the UK native bluebell Hyacinthoides non-scripta ? Type de document : texte imprimé Auteurs : Markus Ruhsam, Auteur ; Deborah Kohn, Auteur ; Jeannine Marquardt, Auteur ; Andrew R. Leitch, Auteur ; Harald Schneider, Auteur ; Johannes Vogel, Auteur ; Spencer C. H. Barrett, Auteur ; Philip E. Hulme, Auteur ; Jane Squirrell, Auteur ; Peter M. Hollingsworth, Auteur Année de publication : 2023 Article en page(s) : pp. 813-1010 Langues : Anglais (eng) Catégories : [ZG] Royaume-Uni
[Espèces (in biblio)] Hyacinthoides hispanica
[Espèces (in biblio)] Hyacinthoides non-scripta
[Thèmes] ConservationMots-clés : hybridation plante menacée introgression Hyacinthoides x massartiana Résumé : "Hybridisation is an important evolutionary force in plants, but it can potentially lead to genetic swamping and extinction of one or both parental species. The threat of extinction is of particular concern if hybridisation occurs between native and introduced species, especially when the native is of national importance. The widespread occurrence of non-native bluebells in the United Kingdom has raised concerns that the iconic native bluebell could be at risk due to extinction by hybridisation from introduced non-native bluebells. This study determines the taxonomic identity of non-natives and investigates the amount of hybridisation occurring in natural and semi-natural UK bluebell populations." (source : auteurs) Type de publication : périodique Référence biblio : Ruhsam M., Kohn D., Marquardt J., Leitch A., Schneider H., Vogel J., Barrett S.-H., Hulme P., Squirrell J., Hollingsworth P., 2023 - Is hybridisation with non-native congeneric species a threat to the UK native bluebell Hyacinthoides non-scripta ? Plants, people, planet, 5 (6) : 813-1010. ID PMB : 71619 En ligne : https://nph.onlinelibrary.wiley.com/doi/epdf/10.1002/ppp3.10387 Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71619
in Plants, people, planet > vol. 5, n°6 (Année 2023) . - pp. 813-1010[article]Exemplaires(0)
Disponibilité aucun exemplaire Taxonomic complexity, conservation and recurrent origins of self-pollination in Epipactis (Orchidaceae) / Peter M. Hollingsworth
in Current taxonomic research on the British & European Flora (Leicester, 13-14 September 2003) / John Bailey (2006)
Titre : Taxonomic complexity, conservation and recurrent origins of self-pollination in Epipactis (Orchidaceae) Type de document : texte imprimé Auteurs : Peter M. Hollingsworth, Auteur ; J. Squirrell, Auteur ; M.L. Hollingsworth, Auteur ; A. J. Richards, Auteur ; Richard M. Bateman, Auteur Importance : pp. 27-44 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Epipactis
[Thèmes] TaxonomieMots-clés : cpSSRs plante endémique marqueur génétique RFLPs Résumé : "The recent post-glacial colonisation of Britain has given little time for the evolution of endemic plant species. The few British endemic species that have been recognised tend to occur in taxonomically complex groups that possess mechanisms promoting rapid diversi-fication. Such taxonomie complexity leads to problems for plant conservation because a species has to be circumscribed and recognised before its distribution, status and threats can be established. One classic example of the challenges for conservation in taxonomie ally complex groups is the British endemic orchid Epipactis youngiana. This species is afforded full legal conservation protection but is one of a large number of taxonomically difficult species recently recognised in the genus; it is difficult to distinguish from the more common E. helleborine, and its species status has been questioned. We have used a combination of genetic markers (allozymes, chloroplast microsatellites and RFLPs) from a large sample set to establish the taxonomie and conservation status of E. youngiana and to place it in the wider context of patterns of breeding system variation and taxon differentiation in the genus. Our data provide evidence that recurrent breeding system transitions between cross-pollination and self-pollination are an important mechanism for diversification in the genus, and there are numerous genetically different taxa that are homozygous and uniform for different subsets of allelic diversity found in allogamous species.
E. youngiana is the one major exception to this pattern. It has a floral morphology consistent with self-pollination, but has not achieved reproductive isolation from E. helleborine. The potential mechanisms underlying the recurrent evolution of self-pollination in Epipactis are discussed, as is the need for developing conservation strategies that reflect dynamic diversification in the genus, rather than the current heavily typological (is it distinct or not?) species-based approach." (source : auteurs)Type de publication : article de livre Référence biblio : Hollingsworth P.-M., Squirrell J., Hollingsworth M.-L., Richards A.-J., Bateman R., 2006 - Taxonomic complexity, conservation and recurrent origins of self-pollination in Epipactis (Orchidaceae). In : Bailey J., Ellis G., Eds, 2006 - Current taxonomic research on the British & European Flora (Leicester, 13-14 September 2003). London : Botanical Society of the British Isles, 27-44. ID PMB : 6459 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=6459 Exemplaires(0)
Disponibilité aucun exemplaire