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Little hope for the polyploid endemic Pyrenean Larkspur (Delphinium montanum): Evidences from population genomics and Ecological Niche Modeling / Pascaline Salvado in Ecology and evolution, 12 (2022) 

Public Citation [article]  inEcology and evolution > 12 (2022) . - 1-13 Titre : Little hope for the polyploid endemic Pyrenean Larkspur (Delphinium montanum): Evidences from population genomics and Ecological Niche Modeling Type de document : Imprimé Auteurs : Pascaline Salvado ; Pere Aymerich Boixader ; Josep Parera ; Albert Vila Bonfill ; Maria Martin ; Céline Quélénnec ; Jean Marc Lewin ; Valérie Delorme-Hinoux ; Joris A. M. Bertrand Année de publication : 2022 Article en page(s) : 1-13 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Généralités en systématique, génétique et amélioration des plantes Résumé : Species endemic to restricted geographical ranges represent a particular conservation issue, be it for their heritage interest. In a context of global change, this is particularly the case for plants which belong to high-mountain ecosystems and, because of their ecological requirements, are doomed to survive or disappear on their “sky islands”. The Pyrenean Larkspur (Delphinium montanum, Ranunculaceae) is endemic to the Eastern part of the Pyrenees (France and Spain). It is now only observable at a dozen of localities and some populations show signs of decline, such as a recurrent lack of flowering. Implementing population genomics approach (e.g., RAD-seq like) is particularly useful to understand genomic patterns of diversity and differentiation in order to provide recommendations in term of conservation. However, it remains challenging for species such as D. montanum that are autotetraploid with a large genome size (1C-value >10 pg) as most methods currently available were developed for diploid species. A Bayesian framework able to call genotypes with uncertainty allowed us to assess genetic diversity and population structure in this system. Our results show evidence for inbreeding (mean GIS = 0.361) within all the populations and substantial population structure (mean GST = 0.403) at the metapopulation level. In addition to a lack of connectivity between populations, spatial projections of Ecological Niche Modeling (ENM) analyses under different climatic scenarios predict a dramatic decrease of suitable habitat for D. montanum in the future. Based on these results, we discuss the relevance and feasibility of different conservation measures. Lien pérenne : DOI : 10.1002/ece3.8711 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=147439 Salvado, Pascaline, Boixader, Pere Aymerich, Parera, Josep, Bonfill, Albert Vila, Martin, Maria, Quélénnec, Céline, Lewin, Jean Marc, Delorme-Hinoux, Valérie, Bertrand, Joris A. M. 2022 Little hope for the polyploid endemic Pyrenean Larkspur (Delphinium montanum): Evidences from population genomics and Ecological Niche Modeling. Ecology and evolution, 12: 1-13.

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Whole plastid genome-based phylogenomics supports an inner placement of the O. insectifera group rather than a basal position in the rapidly diversifying Ophrys genus (Orchidaceae) / Joris A. M. Bertrand in Botany letters, 168 (3) (2021)

Public Citation [article]  inBotany letters > 168 (3) (2021) . - 452-457 Titre : Whole plastid genome-based phylogenomics supports an inner placement of the O. insectifera group rather than a basal position in the rapidly diversifying Ophrys genus (Orchidaceae) Type de document : Imprimé Auteurs : Joris A. M. Bertrand ; Anaïs Gibert ; Christel LLauro ; Olivier Panaud Année de publication : 2021 Article en page(s) : 452-457 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Génétique et écologie (dynamique, démographique, sélection) Mots-clés : ophrys insectifera Résumé : Some lineages of the orchid genus Ophrys exhibit among the highest diversification rates reported so far. As a consequence of a such intense and rapid evolution, the systematics and taxonomy of this genus remain unclear. A hybrid assembly approach based-on long- and short-read genomic data allowed us to outperform classical methods to successfully assemble whole plastid genomes for two new species of Ophrys: O. aymoninii and O. lutea. Along with three other previously Ophrys plastid genome sequences, we then reconstructed the first whole plastome-based molecular phylogeny including representatives of the three mains recognized Ophrys lineages. Our results support the placement of the O. insectifera clade as sister group of “non-basal Ophrys” rather than a basal position. Our findings corroborate recent results obtained from genomic data (RAD-seq and transcriptomes) but contrast with previous ones. These results therefore confirm that molecular phylogenetic hypotheses based on a limited number of loci (e.g. nrITS, matK, rbcL) may have provided a biased picture of phylogenetic relationships within Ophrys and possibly other plant taxa. Lien pérenne : DOI : 10.1080/23818107.2021.1893216 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=146886 Bertrand, Joris A. M., Gibert, Anaïs, LLauro, Christel, Panaud, Olivier 2021 Whole plastid genome-based phylogenomics supports an inner placement of the O. insectifera group rather than a basal position in the rapidly diversifying Ophrys genus (Orchidaceae). Botany letters, 168(3): 452-457.

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
R20637	P-1824	Revue	Centre de documentation	Revues	Consultable