caa a22 4500 475806387 CHVBK 20180406123748.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/BF00985278 doi (NATIONALLICENCE)springer-10.1007/BF00985278 The natural delimitation of Centaurea (Asteraceae: Cardueae): ITS sequence analysis of the Centaurea jacea group [Elektronische Daten] [N. Garcia-Jacas, A. Susanna, V. Mozaffarian, R. Ilarslan] Taxonomic complexity has hindered partitioning the genusCentaurea into natural subdivisions, even though it has long been recognized as an unwieldy, artificial assemblage. Most of the remaining difficulties center in theCentaurea jacea group, whose taxa share a common advanced type of pollen. Because it comprises half the species of the genusCentaurea, as well as five other disputed genera previously segregated fromCentaurea (Chartolepis, Cheirolepis, Cnicus, Grossheimia andTomanthea), theCentaurea jacea group is a significant taxonomic challenge. Newer molecular approaches are useful for resolving complex relationships because they provide more precise inferences of evolutionary relationships than traditional morphological characters. Sequences of the Internal Transcribed Spacers (ITS) of nuclear ribosomal DNA were analyzed for a comprehensive sample of this group. Results indicated that theCentaurea jacea group is monophyletic and includes the segregated genera, but not two other genera (Oligochaeta andZoegea), whose inclusion in theCentaurea jacea group was doubtful. In addition to pollen morphology, the ITS phylogeny is also supported by karyological evidence and by good correlation with biogeographic distribution of the species. The monophyly of theCentaurea jacea group suggests that a natural delimitation ofCentaurea that minimizes nomenclatural changes is possible, but only if a new type of the genus is designated. Springer-Verlag, 2000 Centaurea nationallicence Oligochaeta nationallicence Zoegea nationallicence phylogeny nationallicence ITS nationallicence Garcia-Jacas N. Institut Botànic de Barcelona (C.S.I.C.), Av. Muntanyans s. n., E-08038, Barcelona, Spain aut Susanna A. Institut Botànic de Barcelona (C.S.I.C.), Av. Muntanyans s. n., E-08038, Barcelona, Spain aut Mozaffarian V. Botanical Department, Research Institute of Forests and Rangelands, P.O. Box 13185-116, Tehran, Iran aut Ilarslan R. Fen Fakültesi, Biyoloji Bölümü, Botanik Anabilim Dali, Ankara Üniversitesi, TR-06100, Tandogan, Ankara, Turkey aut Plant Systematics and Evolution Springer-Verlag 223/3-4(2000-09-01), 185-199 0378-2697 223:3-4<185 2000 223 606 https://doi.org/10.1007/BF00985278 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00985278 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Garcia-Jacas N. Institut Botànic de Barcelona (C.S.I.C.), Av. Muntanyans s. n., E-08038, Barcelona, Spain aut NATIONALLICENCE 700 1- Susanna A. Institut Botànic de Barcelona (C.S.I.C.), Av. Muntanyans s. n., E-08038, Barcelona, Spain aut NATIONALLICENCE 700 1- Mozaffarian V. Botanical Department, Research Institute of Forests and Rangelands, P.O. Box 13185-116, Tehran, Iran aut NATIONALLICENCE 700 1- Ilarslan R. Fen Fakültesi, Biyoloji Bölümü, Botanik Anabilim Dali, Ankara Üniversitesi, TR-06100, Tandogan, Ankara, Turkey aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 223/3-4(2000-09-01), 185-199 0378-2697 223:3-4<185 2000 223 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer