Genome size in Hieracium subgenus Hieracium (Asteraceae) is strongly correlated with major phylogenetic groups.

ABSTRACT:

Background and aims

Hieracium subgenus Hieracium is one of the taxonomically most intricate groups of vascular plants, due to polyploidy and a diversity of breeeding systems (sexuality vs. apomixis). The aim of the present study was to analyse nuclear genome size in a phylogenetic framework and to assess relationships between genome size and ploidy, breeding system and selected ecogeographic features.

Methods

Holoploid and monoploid genome sizes (C- and Cx-values) of 215 cultivated plants from 89 field populations of 42 so-called 'basic' Hieracium species were determined using propidium iodide flow cytometry. Chromosome counts were available for all analysed plants, and all plants were tested experimentally for their mode of reproduction (sexuality vs. apomixis). For constru

SUBMITTER: Chrtek J 

PROVIDER: S-EPMC2706716 | biostudies-literature | 2009 Jul

REPOSITORIES: biostudies-literature