Genetic variation in agamospermous populations of Hieracium echioides in southern Slovakia and northern Hungary (Danube Basin)

Title:

Genetic variation in agamospermous populations of Hieracium echioides in southern Slovakia and northern Hungary (Danube Basin)
Genetická variabilita agamospermických populací Hieracium echioides na jižním Slovensku a v severním Maďarsku (Podunají)

Creator:

Peckert, Tomáš, Chrtek jun., Jindřich, and Plačková, Ivana

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:a2c7847d-4dfc-970d-34b0-503f9228263b
uuid:a2c7847d-4dfc-970d-34b0-503f9228263b

Subject:

Asteraceae, allozyme analysis, Compositae, karyology, agamospermy, Hieracium echioides, and Danube Basin

Type:

article and TEXT

Description:

Six populations of Hieracium echioides subsp. echioides var. tauscheri from the Danube Basin between Bratislava and Budapest (locations: Balinka, Čenkov, Devín, Dorog, Győr, Pilis) were analysed using allozyme and karyological analysis. Five allozyme systems (EST, LAP, 6PGDH, PGM, and SKDH) were used to analyse the genetic structure of the examined populations. Analyses revealed low genetic variation both within- and among populations. Four multilocus allozyme phenotypes were detected; three populations (Čenkov, Devín and Győr) possessed phenotype I exclusively, while phenotype II was found only in the Balinka and Dorog populations. Two different phenotypes were found in the population of Pilis (phenotypes III and IV). However, due to the complex banding patterns generated for EST, allelic interpretationwas not possible, and the Balinka and Dorog populations appeared to possess different phenotypes. All populations proved to be tetraploid (2n = 36) and agamospermous. The geographic distribution pattern of the analysed populations (one allozyme phenotype at several isolated localities) may reflect a more common occurrence of the taxon in the past. Landscape changes, caused by changes in human management of the country, may have resulted in a loss of suitable localities, mainly open sandy habitats. These changes may have caused the reduction and fragmentation of H. *tauscheri habitat.

Language:

English

Rights:

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

Source:

Preslia | 2005 Volume:77 | Number:3

Harvested from:

CDK

Metadata only:

false