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

ABSTRACT:

Background and aims

The present study aims to assess the diversity and distribution of cytotypes of Aster amellus in central and eastern Europe, contributing with data to improve understanding of the evolutionary dynamics of the contact zone between diploids and hexaploids of this polyploid complex.

Methods

Large-scale cytotype screening of 4720 individuals collected in 229 populations was performed using 4',6-diamidino-2-phenylindole (DAPI) flow cytometry. Fine-scale cytotype screening was performed in the mixed-ploidy population. Reproductive variables, such as number of florets per flower head, seed set and seedling emergence, as well as ploidy level of seeds and seedlings were recorded in this population.

Key results

The diploid-hexaploid contact zone is large and

SUBMITTER: Castro S 

PROVIDER: S-EPMC3448430 | biostudies-literature | 2012 Oct

REPOSITORIES: biostudies-literature