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Complex distribution patterns of di-, tetra- and hexaploid cytotypes in the European high mountain plant Senecio carniolicus Willd. (Asteraceae)
- 1.0090397 - BÚ 2008 RIV US eng J - Journal Article
Suda, Jan - Weiß-Schneeweiss, H. - Tribsch, A. - Schneeweiss, G. M. - Trávníček, Pavel - Schönswetter, P.
Complex distribution patterns of di-, tetra- and hexaploid cytotypes in the European high mountain plant Senecio carniolicus Willd. (Asteraceae).
[Komplexní distribuční struktura di-, tetra- a hexaploidních cytotypů evropské vysokohorské rostliny Senecio carniolicus (Asteraceae).]
American Journal of Botany. Roč. 94, č. 8 (2007), s. 1391-1401. ISSN 0002-9122. E-ISSN 1537-2197
R&D Projects: GA ČR GA206/06/0598
Grant - others:Austrian Science Fund(AT) FWFP13874-BIO; Austrian Science Fund(AT) T218-BIO
Institutional research plan: CEZ:AV0Z60050516
Keywords : Senecio carniolicus * cytotype mixture * DNA-ploidy
Subject RIV: EF - Botanics
Impact factor: 2.512, year: 2007
A complex pattern of ploidy level variation (2x, 4x, 5x, 6x, and 7x cytotypes) was found in this species, which has been considered uniformly hexaploid. Hexaploids predominated in the Eastern Alps and was the only cytotype found in the Carpathians, while odd ploidy levels (5x, 7x) constituted a small fraction of the samples. Tetraploids occurred in two disjunct areas, which correspond with putative Pleistocene refugia for silicicolous alpine plants. Diploids occurred in large portions of the Alps but were absent from areas most extensively glaciated in the past.
Byla objevena vysoká míra ploidní variability (2x, 4x, 5x, 6x a 7x) u druhu Senecio carniolicus, který byl dříve považován za druh čistě hexaploidní. Hexaploidní jedinci dominují ve Východních Alpách a Karpatech, zatímco liché ploidie (5x a 7x) představují minoritní cytotypy (zastoupení < 1.3%). Tetraploidní jedinci se vyskytují ve dvou disjunktních areálech, které korespondují s předpokládanými Pleistocenními refugii pro silikátové aplské rostliny.
Permanent Link: http://hdl.handle.net/11104/0151294
Number of the records: 1