Complex distribution patterns, ecology and coexistence of ploidy levels of Allium oleraceum (Alliaceae) in the Czech Republic

0347671 - BÚ 2011 RIV GB eng J - Journal Article
Duchoslav, M. - Šafářová, L. - Krahulec, František
Complex distribution patterns, ecology and coexistence of ploidy levels of Allium oleraceum (Alliaceae) in the Czech Republic.
Annals of Botany. Roč. 105, č. 5 (2010), s. 719-735. ISSN 0305-7364. E-ISSN 1095-8290
R&D Projects: GA ČR GA206/07/0706
Institutional research plan: CEZ:AV0Z60050516
Keywords : Allium oleraceum * ecological differentiation * cytotapes
Subject RIV: EF - Botanics
Impact factor: 3.388, year: 2010

In the Czech Republic, pentaploids (2n=5x=40) predominated, while hexaploids (2n=6x=48) and tetraploids (2n=4x=32) were less frequent. The distribution of tetra- and hexaploids was partially sympatric (in the eastern part) to parapatric (in the western part of the Czech Republic) whereas pentaploids were sympatric with other cytotypes. Plants of different ploidy levels were found to be ecologically differentiated and the ruderal character of cytotypes increased in the direction 4x-5x-6x with the largest realized niche differences between tetra- and hexaploids. Most populations contained only one ploidy level (77 %), 22% had two (all possible combinations) and 1% were composed of three ploidy levels.
Permanent Link: http://hdl.handle.net/11104/0188402