Cytotype distribution at a diploid-hexaploid contact zone in Aster amellus (Asteraceae)

0385876 - BÚ 2013 RIV GB eng J - Článek v odborném periodiku
Castro, Sílvia - Loureiro, J. - Procházka, T. - Münzbergová, Zuzana
Cytotype distribution at a diploid-hexaploid contact zone in Aster amellus (Asteraceae).
Annals of Botany. Roč. 110, č. 5 (2012), s. 1047-1050. ISSN 0305-7364. E-ISSN 1095-8290
Grant CEP: GA ČR GPP506/10/P188
Výzkumný záměr: CEZ:AV0Z60050516
Klíčová slova: Aster amellus * diploid * hexaploid
Kód oboru RIV: EF - Botanika
Impakt faktor: 3.449, rok: 2012

The results show that contact zone of diploid and hexaploid A. amellus in central and eastern Europe seems to be highly dynamic and diffuse, with both primary and secondary contacts being possible. The obtained results suggest the origin of hexaploids through diploids, overall supporting previous hypotheses that this species is autopolyploid. Data from the only mixed-ploidy population detected so far suggest that the minority cytotype exclusion is an important evolutionary mechanisms driving the prevalence of single-cytotype populations, and thus contributing to the current distributional patterns of the cytotypes of A. amellus.
Trvalý link: http://hdl.handle.net/11104/0215077