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Auteur Magdalena Szczepaniak |
Documents disponibles écrits par cet auteur (2)
trié(s) par (Pertinence décroissant(e), Titre croissant(e)) Affiner la rechercheNo evidence of contemporary interploidy gene flow between the closely related European woodland violets Viola reichenbachiana and V. riviniana (sect. Viola, Violaceae) / Grzegorz Migdalek in Plant biology, vol. 19, n°4 (Juillet 2017)
Titre : No evidence of contemporary interploidy gene flow between the closely related European woodland violets Viola reichenbachiana and V. riviniana (sect. Viola, Violaceae) Type de document : texte imprimé Auteurs : Grzegorz Migdalek, Auteur ; Justyna Nowak, Auteur ; Marta Saluga, Auteur ; Elzbieta Cieslak, Auteur ; Magdalena Szczepaniak, Auteur ; Michal Ronikier, Auteur ; Thomas Marcussen, Auteur ; Aneta Slomka, Auteur ; Elzbieta Kuta, Auteur Année de publication : 2017 Article en page(s) : pp. 542-551 Langues : Anglais (eng) Mots-clés : Viola allopolyploïdie genetic relationships haplotypes hybridisation introgression gène Résumé : "Viola reichenbachiana (2n = 4x = 20) and V. riviniana (2n = 8x = 40) are closely related species widely distributed in Europe, often sharing the same habitat throughout their overlapping ranges. It has been suggested in numerous studies that their high intraspecific morphological variability and plasticity might have been further increased by interspecific hybridisation in contact zones, given the sympatry of the species and the incomplete sterility of their hybrid. The aims of this study were to: (i) confirm that V. reichenbachiana and V. riviniana have one 4x genome in common, and (ii) determine the impact of hybridisation and introgression on genetic variation of these two species in selected European populations. For our study, we used 31 Viola populations from four European countries, which were analysed using AFLP and sequencing of a variable plastid intergenic spacer, trnH-psbA. Our analysis revealed that V. reichenbachiana exhibited larger haplotype diversity, having three species-specific haplotypes versus one in V. riviniana. The relationships among haplotypes suggest transfer of common haplotypes into V. riviniana from both V. reichenbachiana and hypothetically the other, now extinct, parental species. AFLP analysis showed low overall genetic diversity of both species, with V. riviniana showing higher among-population diversity. None of the morphologically designated hybrid populations had additive AFLP polymorphisms that would have indicated recent hybridisation. Also, kinship coefficients between both species did not indicate gene flow. V. riviniana showed significant population subdivision and significant isolation by distance, in contrast to V. reichenbachiana. The results indicate lack of gene flow between species, high influence of selfing on genetic variability, as well as probably only localised introgression toward V. riviniana." (source : auteurs) Type de publication : périodique Référence biblio : Migdalek G., Nowak J., Saluga M., Cieslak E., Szczepaniak M., Ronikier M., Marcussen T., Slomka A., Kuta E., 2017 - No evidence of contemporary interploidy gene flow between the closely related European woodland violets Viola reichenbachiana and V. riviniana (sect. Viola, Violaceae). Plant biology, 19 (4) : 542-551. ID PMB : 65919 DOI : 10.1111/plb.12571 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=65919
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Titre : RAD sequencing, morphometry and synecology clarify the taxonomy of the Melica ciliata (Poaceae) complex in France and Poland Type de document : texte imprimé Auteurs : Sergio Castro, Auteur ; Audrey Muratet, Auteur ; Magdalena Szczepaniak, Auteur ; Julie Nguefack, Auteur ; Laurent Hardion, Auteur Année de publication : 2022 Article en page(s) : pp. 764-775 Langues : Anglais (eng) Catégories : [ZG] France
[ZG] Pologne
[Espèces (in biblio)] Melica
[Espèces (in biblio)] Melica ciliata
[Thèmes] Clé de détermination
[Thèmes] Morphologie végétaleMots-clés : chorologie analyse moléculaire phytoécologie Résumé : "Melica (Poaceae) consist of about 92 species distributed across temperate regions of the world. Within section Dalycum, Melica ciliata sensu lato forms a taxonomic complex of several species and subspecies with clinal morphological variation causing conflicting identifications. To resolve taxonomic confusion, we employed three complementary approaches, through molecular, morphological and phytoecological analyses. The double‐digest restriction associated DNA markers significantly support the monophyly of three taxa: (i) the Mediterranean M. magnolii, (ii) the Eurasian M. transsilvanica subsp. transsilvanica and (iii) the west‐European M. ciliata subsp. glauca. This differentiation is corroborated by the analysis of 22 morphometric variables. Furthermore, phytoecological analysis of 221 floristic inventories revealed habitat distinctions among these taxa. Our approach of integrative taxonomy argues for a specific distinction for these three taxa, and we include a key to separate these forms. This new molecular data on the section Dalycum, subsection Ciliatae, calls for further phylogenetic analyses including samples of M. ciliata subsp. ciliata and other East‐Mediterranean and South African taxa. This article is protected by copyright. All rights reserved." (source : auteurs) Type de publication : périodique Référence biblio : Castro S., Muratet A., Szczepaniak M., Nguefack J., Hardion L., 2022 - RAD sequencing, morphometry and synecology clarify the taxonomy of the Melica ciliata (Poaceae) complex in France and Poland. Journal of Systematics and Evolution, 61 (5) : 764-775. ID PMB : 71284 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71284
in Journal of Systematics and Evolution > vol. 61, n°5 (Année 2022) . - pp. 764-775[article]Exemplaires(0)
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