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Genetic, cytological and morphological differentiation within the Balkan-Carpathian Sesleria rigida sensu Fl. Eur. (Poaceae): A taxonomically intricate tetraploid-octoploid complex

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Abstract:

Reconstruction of relationships among populations of the morphologically polymorphic and taxonomically intricate Sesleria rigida sensu Fl. Eur. based on Amplified Fragment Length Polymorphisms (AFLPs) revealed four clearly differentiated genetic groups that did only partly follow recent taxonomic concepts, but were strictly allopatric. While some of the previously described taxa constitute distinct genetic entities, others have no taxonomic value. Synthesizing our AFLP data with ploidy-level information obtained from all genetically investigated individuals as well as with chromosome counts revealed that tetraploid individuals prevail, while octoploids occur only within S. filifolia. Lack of AFLP divergence between tetra- and octoploids suggests an autopolyploid origin of the latter. The genetic differentiation pattern was reflected by morphological differentiation, allowing for a taxonomic revision of the constituents of S. rigida sensu Fl. Eur. resulting in recognition of the four species S. achtarovii, S. filifolia, S. rigida, and S. serbica.

Keywords: AFLP; AUTOPOLYPLOIDY; FLOW CYTOMETRY; MORPHOMETRICS; SESLERIA RIGIDA; TAXONOMY

Document Type: Research Article

DOI: http://dx.doi.org/10.12705/623.13

Affiliations: 1: Institute of Botany and Botanical Garden, Faculty of Biology, University of Belgrade, Takovska 43, 11000 Belgrade, Serbia; ;, Email: nkuzmanovic@bio.bg.ac.rs 2: Botanical Garden “Dimitrie Brandza”, Sos. Cotroceni 32, 060101 Bucharest, Romania 3: Institute of Botany, University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria 4: Institute of Botany and Botanical Garden, Faculty of Biology, University of Belgrade, Takovska 43, 11000 Belgrade, Serbia 5: Department of Systematic and Evolutionary Botany, University of Vienna, Rennweg 14, 1030 Vienna, Austria 6: Institute of Botany, University of Innsbruck, Sternwartestraße 15, 6020 Innsbruck, Austria;, Email: peter.schoenswetter@uibk.ac.at

Publication date: June 17, 2013

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