Morphometric and genetic differentiation of diploid and hexaploid populations of Aster amellus agg. in a contact zone

0314937 - BÚ 2009 RIV AT eng J - Journal Article
Mandáková, T. - Münzbergová, Zuzana
Morphometric and genetic differentiation of diploid and hexaploid populations of Aster amellus agg. in a contact zone.
[Morfologická a genetická diferenciace populací Aster amellus.]
Plant Systematics and Evolution. Roč. 274, 3-4 (2008), s. 155-170. ISSN 0378-2697. E-ISSN 1615-6110
R&D Projects: GA AV ČR(CZ) IAA600050623
Institutional research plan: CEZ:AV0Z60050516
Keywords : morfology * genetics * Aster amellus
Subject RIV: EF - Botanics
Impact factor: 1.440, year: 2008

The aim of this study is to determine the origin, genetic relationships and morphological differences between diploid and hexaploid cytotypes of Aster amellus aggregate (Asteraceae) at their contact zone in the Czech Republic. We collected data on morphological and isozyme variation in a range of populations of the two cytotypes. We also studied the plasticity of the morphological traits in a common garden. The results suggest that hexaploid individuals of Aster amellus aggregate are of autopolyploid origin. The isozyme data indicate that diploids and hexaploids have different evolutionary histories. This, together with previous detailed cytological and ecological analyses, suggests that there is a secondary contact zone between the two cytotypes in the Czech Republic. The results of multivariate morphometric analyses and data on plasticity of the morphological traits indicate that it is not possible to distinguish the two cytotypes morphologically.

Výsledkem bylo ukázání absence morfologické a genetické diferenciace populací Aster amellus.
Permanent Link: http://hdl.handle.net/11104/0165298