structure of the agamic complex of Hieracium subgen. Pilosella in the Šumava Mts and its comparison with other regions in Central Europe

Title:

structure of the agamic complex of Hieracium subgen. Pilosella in the Šumava Mts and its comparison with other regions in Central Europe
Jestřábníky Hieracium subgen. Pilosella na Šumavě: struktura agamického komplexu a srovnání s dalšími středoevropskými regiony

Creator:

Krahulec, František, Krahulcová, Anna, Fehrer, Judith, Bräutigam, Siegfried, and Schuhwerk, Franz

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:fdcce91e-c3c6-8d6d-a33e-0fa76cff373f
uuid:fdcce91e-c3c6-8d6d-a33e-0fa76cff373f

Subject:

apomixis, chloroplast haplotype, chromosome number, cytotype, DNA, fingerprinting, hybridization, polyhaploids, polyploidy, and reproduction

Type:

article and TEXT

Description:

We studied the agamic complex of Hieracium subgen. Pilosella in the Šumava/Böhmerwald, the borderland between the Czech Republic and Germany. Their DNA ploidy levels/chromosome numbers, breeding systems, chloroplast haplotypes as well as the clonal structure of apomicts were determined. The complex consists of the following basic and intermediate species and recent hybrids. Basic species: H. aurantiacum L. (tetraploid and pentaploid, both apomictic), H. caespitosum Dumort. (tetraploid, apomictic), H. lactucella Wallr. (diploid, sexual), H. pilosella L. (tetraploid, sexual); intermediate species: H. floribundum Wimm. et Grab. (tetraploid, apomictic), H. glomeratum Froel. (tetraploid and pentaploid, both apomictic), H. scandinavicum Dahlst. (tetraploid, apomictic); recent hybrids: H. floribundum × H. pilosella (partly corresponding to H. piloselliflorum – tetraploid and hexaploid; tetraploid sexual or apomictic), H. glomeratum × H.pilosella (aneuploid, 2n = 38), H. aurantiacum × H. floribundum (tetraploid, almost sterile or apomictic), H. lactucella × H. pilosella (H. schultesii, triploid sterile, tetraploid sexual), H. aurantiacum × H. pilosella (H. stoloniflorum, tetraploid, sexual), H. aurantiacum > H. pilosella (H. rubrum, hexaploid). The hexaploid hybrids between H. pilosella and H. floribundum or H. aurantiacum produced mainly polyhaploid progeny. Two trihaploid plants were found growing in the neighbourhood of their putative hexaploid maternal parent H. rubrum, which is the first record of polyhaploids of this subgenus in the field. Comparison with other mountain ranges (especially the Krušné hory/Erzgebirge, and Krkonoše) with an almost identical composition of basic species, revealed that the structure of the agamic complexes differ.

Language:

English

Rights:

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

Source:

Preslia | 2008 Volume:80 | Number:1

Harvested from:

CDK

Metadata only:

false