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Circumscription and phylogeny of Apiaceae subfamily Saniculoideae based on chloroplast DNA sequences / Carolina I. Calviño in Molecular Phylogenetics and Evolution, vol. 44, n°1 (Année 2007)

Public [article]  inMolecular Phylogenetics and Evolution > vol. 44, n°1 (Année 2007) . - pp. 175-191 Titre : Circumscription and phylogeny of Apiaceae subfamily Saniculoideae based on chloroplast DNA sequences Auteurs : Carolina I. Calviño, Auteur ; Stephen R. Downie, Auteur Année de publication : 2007 Article en page(s) : pp. 175-191 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Apiaceae [Espèces (in biblio)] Astrantia [Espèces (in biblio)] Eryngium [Espèces (in biblio)] Sanicula Mots-clés : phylogénétique Résumé : "An estimate of phylogenetic relationships within Apiaceae subfamily Saniculoideae was inferred using data from the chloroplast DNA trnQ-trnK 5′-exon region to clarify the circumscription of the subfamily and to assess the monophyly of its constituent genera. Ninety-one accessions representing 14 genera and 82 species of Apiaceae were examined, including the genera Steganotaenia, Polemanniopsis, and Lichtensteinia which have been traditionally treated in subfamily Apioideae but determined in recent studies to be more closely related to or included within subfamily Saniculoideae. The trnQ-trnK 5′-exon region includes two intergenic spacers heretofore underutilized in molecular systematic studies and the rps16 intron. Analyses of these loci permitted an assessment of the relative utility of these noncoding regions (including the use of indel characters) for phylogenetic study at different hierarchical levels. The use of indels in phylogenetic analyses of both combined and partitioned data sets improves resolution of relationships, increases bootstrap support values, and decreases levels of overall homoplasy. Intergeneric relationships derived from maximum parsimony, Bayesian, and maximum likelihood analyses, as well as from maximum parsimony analysis of indel data alone, are fully resolved and consistent with one another and generally very well supported. We confirm the expansion of subfamily Saniculoideae to include Steganotaenia and Polemanniopsis (as the new tribe Steganotaenieae C.I. Calviño and S.R. Downie) but not Lichtensteinia. Sister group to tribe Steganotaenieae is tribe Saniculeae, redefined to include the genera Actinolema, Alepidea, Arctopus, Astrantia, Eryngium, Petagnaea, and Sanicula. With the synonymization of Hacquetia into Sanicula, all genera are monophyletic. Eryngium is divided into “Old World” and “New World” subclades and within Astrantia sections Astrantia and Astrantiella are monophyletic." (source : auteurs) Type de publication : périodique Référence biblio : Calviño C., Downie S., 2007 - Circumscription and phylogeny of Apiaceae subfamily Saniculoideae based on chloroplast DNA sequences. Molecular Phylogenetics and Evolution, 44 (1) : 175-191. ID PMB : 72251 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=72251 [article]

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Introduction : evolution, biogeography and systematics of the Apiales (Araliaceae and Apiaceae) / M. F. Watson in Edinburgh Journal of Botany, vol. 58, n°2 (Année 2001)

Public [article]  inEdinburgh Journal of Botany > vol. 58, n°2 (Année 2001) . - pp. 179-181 Titre : Introduction : evolution, biogeography and systematics of the Apiales (Araliaceae and Apiaceae) Type de document : texte imprimé Auteurs : M. F. Watson, Auteur ; Gregory M. Plunkett, Auteur ; Stephen R. Downie, Auteur ; Porter P. II Lowry, Auteur Année de publication : 2001 Article en page(s) : pp. 179-181 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Apiaceae [Espèces (in biblio)] Araliaceae Mots-clés : évolution  biogéographie  systématique Résumé : "The family Apiaceae (Umbelliferae) can be credited with two major landmarks in botanical history: the first systematic monographic treatment of any plant group (Morison, 1672), and the first international symposium dedicated to systematic research on a plant family (Heywood, 1971). The 1970 symposium on the Biology and Chemistry of the Umbelliferae held at the University of Reading, UK, resulted from the large body of research interest in the family around the world at that time, and helped to stimulate further work on the Apiaceae. It also provided a model for similar symposia on major plant groups in the years to follow, including Asteraceae (Heywood et al., 1977), Brassicaceae (Vaughan et al., 1976), Lamiaceae (Harley & Reynolds, 1992), Solanaceae (Hawkes et al., 1979), and Fabaceae (Summerfield & Bunting, 1980; Polhill & Raven, 1981). Growing interest in umbellifers soon resulted in a second international symposium on the family held at the Centre Universitaire de Perpignan, France, in 1977 (Cauwet-Marc & Carbonnier, 1982). Although a large role of this second symposium was to review progress on a major co-operative research programme focused mainly on the tribe Caucalideae, participants with other interests were also involved, and wider developments in the systematics of the family were discussed." (source : auteurs) Type de publication : périodique Référence biblio : Watson M.-F., Plunkett G., Downie S.-R., Lowry P.-I., 2001 - Introduction : evolution, biogeography and systematics of the Apiales (Araliaceae and Apiaceae). Edinburgh Journal of Botany, 58 (2) : 179-181. ID PMB : 65381 DOI : 10.1017/S0960428601000555/10.1017/S0960428601000555 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=65381 [article]

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The evolutionary history of Eryngium (Apiaceae, Saniculoideae) : rapid radiations, long distance dispersals and hybridizations / Carolina I. Calviño in Molecular Phylogenetics and Evolution, vol. 46 (2008)

Public [article]  inMolecular Phylogenetics and Evolution > vol. 46 (2008) . - pp. 1129-1150 Titre : The evolutionary history of Eryngium (Apiaceae, Saniculoideae) : rapid radiations, long distance dispersals and hybridizations Auteurs : Carolina I. Calviño, Auteur ; S. G. Martínez, Auteur ; Stephen R. Downie, Auteur Année de publication : 2008 Article en page(s) : pp. 1129-1150 Langues : Français (fre) Catégories : [Espèces (in biblio)] Eryngium [Thèmes] Biogéographie Mots-clés : phylogénie  ADN chloroplastique (trnQ-trnK 5'-exon) Résumé : "Eryngium is the largest and arguably the most taxonomically complex genus in the family Apiaceae. Infrageneric relationships within Eryngium were inferred using sequence data from the chloroplast DNA trnQ–trnK 5′-exon and nuclear ribosomal DNA ITS regions to test previous hypotheses of subgeneric relationships, explain distribution patterns, reconstruct ancestral morphological features, and elucidate the evolutionary processes that gave rise to this speciose genus. In total, 157 accessions representing 118 species of Eryngium, 15 species of Sanicula (including the genus Hacquetia that was recently reduced to synonymy) and the monotypic Petagnaea were analyzed using maximum parsimony and Bayesian methods. Both separate and simultaneous analyses of plastid and nuclear data sets were carried out because of the prevalence of polyploids and hybrids within the genus. Eryngium is confirmed as monophyletic and is divided into two redefined subgenera: Eryngium subgenus Eryngium and E. subgenus Monocotyloidea. The first subgenus includes all examined species from the Old World (Africa, Europe, and Asia), except Eryngium tenue, E. viviparum, E. galioides, and E. corniculatum. Eryngium subgenus Monocotyloidea includes all examined species from the New World (North, Central and South America, and Australia; herein called the “New World sensu stricto” clade) plus the aforementioned Old World species that fall at the base of this clade. Most sectional and subgeneric divisions previously erected on the basis of morphology are not monophyletic. Within the “New World sensu stricto” group, six clades are well supported in analyses of plastid and combined plastid and nuclear data sets; the relationships among these clades, however, are unresolved. These clades are designated as “Mexican”, “Eastern USA”, “South American”, “North American monocotyledonous”, “South American monocotyledonous”, and “Pacific”. Members of each clade share similar geographical distributions and/or morphological or ecological traits. Evidence from branch lengths and low sequence divergence estimates suggests a rapid radiation at the base of each of these lineages. Conflict between chloroplast and nuclear data sets is weak, but the disagreements found are suggestive that hybrid speciation in Eryngium might have been a cause, but also a consequence, of the different rapid radiations observed. Dispersal-vicariance analysis indicates that Eryngium and its two subgenera originated from western Mediterranean ancestors and that the present-day distribution of the genus is explained by several dispersal events, including one trans-Atlantic dispersal. In general, these dispersals coincide with the polytomies observed, suggesting that they played key roles in the diversification of the genus. The evolution of Eryngium combines a history of long distance dispersals, rapid radiations, and hybridization, culminating in the taxonomic complexity observed today in the genus." (source : auteurs) Note de contenu : Cet article traite des relations infragénériques au sein du genre Eryngium, le plus grand et probablement le plus complexe sur le plan taxonomique de la famille des Apiaceae. Les auteurs utilisent des données de séquences d'ADN chloroplastique (trnQ-trnK 5'-exon) et d'ADN ribosomique nucléaire (régions ITS) pour tester les hypothèses précédentes concernant les relations sous-génériques, expliquer les schémas de distribution, reconstruire les caractéristiques morphologiques ancestrales et élucider les processus évolutifs à l'origine de ce genre riche en espèces.L'article montre que la diversification et la répartition des espèces d'Eryngium sont le résultat de plusieurs mécanismes évolutifs complexes, incluant la dispersion, les radiations rapides et l'hybridation, donnant lieu à la diversité et la complexité taxonomique actuelles du genre. Type de publication : périodique Référence biblio : Calviño C., Martínez S.-G., Downie S., 2008 - The evolutionary history of Eryngium (Apiaceae, Saniculoideae) : rapid radiations, long distance dispersals and hybridizations. Molecular Phylogenetics and Evolution, 46 : 1129-1150. ID PMB : 48481 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=48481 [article]

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