Hieracium bauhini group in Central Europe: chromosome numbers and breeding systems

Title:

Hieracium bauhini group in Central Europe: chromosome numbers and breeding systems
Počty chromozómů a způsoby reprodukce jestřábníků ze skupiny Hieracium bauhini ve střední Evropě

Creator:

Rotreklová , Olga

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:de5c48da-7386-4bf7-823a-af405db9649b
uuid:de5c48da-7386-4bf7-823a-af405db9649b

Subject:

Compositae, cytogeography, Czech Republic, Germany, Hungary, karyology, ploidy level, Poland, reproduction mode, and Slovakia

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Chromosome numbers for 239 plants from 84 localities in the Czech Republic, Slovakia, Hungary, Germany and Poland are given. Most of the populations were pentaploid (2n = 45), while hexaploid (2n = 54) and tetraploid (2n = 36) populations were rarer. A long marker chromosome was observed in plants from 8 pentaploid populations. Tetraploid plants occurred mainly in Slovakia and Hungary. In the Czech Republic and Germany, most populations were pentaploid. Hexaploid populations (2n = 54) were rare but scattered over the entire study area. The co-occurrence of two different cytotypes was documented at 7 sites. Most tetraploids were fully sexual and only a few tetraploid plants from Poland were apomictic; pentaploid and hexaploid plants were apomictic. Two morphotypes of H. bauhini were distinguished: tetraploid and hexaploid plants from Slovakia and Hungary, and some hexaploid plants from the Czech Republic were assigned to the H. magyaricum group, while tetraploids and hexaploids from the Czech Republic and Poland plus all pentaploids belong to the H. bauhini group.

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

313-330

Source:

Preslia | 2004 Volume:76 | Number:4

Harvested from:

CDK

Metadata only:

false