Contribution to the karyological knowledge of Echinops (Asteraceae, Cardueae) and related genera |
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| Authors: | TERESA GARNATJE ,ROSER VILATERSANA,ALFONSO SUSANNA,JOAN VALLÈ S, SONJA SILJAK-YAKOVLEV |
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| Affiliation: | Institut Botànic de Barcelona (CSIC-Ajuntament de Barcelona), Passeig del Migdia s. n., Parc de Montjuïc, 08038 Barcelona, Catalonia, Spain; Laboratori de Botànica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII s. n., 08028 Barcelona, Catalonia, Spain; Laboratoire d'Evolution et Systématique. UMR-CNRS 8079, Universitéde Paris-Sud, Bât. 360, 91405 Orsay Cedex, France |
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| Abstract: | Twenty-six chromosome counts were made of several genera of the tribe Cardueae from various European and Asian provenances: Acantholepis (one species studied), Amphoricarpus (1), Chardinia (1), Echinops (14 species, 15 populations), Siebera (1), Staehelina (3) and Xeranthemum (4). Eleven of the reports are made for the first time, ten confirm previous counts, while the remainder report disparities with earlier records. The existence of different basic chromosome numbers and ploidy levels suggests dysploidy and polyploidy as the main mechanisms of chromosomal evolution in the taxa considered. © 2004 The Linnean Society of London, Botanical Journal of the Linnean Society , 2004, 145 , 337−344. |
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| Keywords: | chromosome numbers Compositae dysploidy polyploidy |
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