Sorbus pauca species nova, the first endemic species of the Sorbus hybrida group for the Czech Republic = Sorbus pauca species nova - první endemický druh z okruhu Sorbus hybrida pro Českou republiku.

Další autoři:	Lepší, Petr Lepší, Martin, 1977- Sádlo, Jiří, 1958- Koutecký, Petr, 1978- Vít, Petr Petřík, Petr
Jazyk:	English; Czech
Předmět:	růžovité průtoková cytometrie Rosaceae flow cytometry články journal articles apomixis DAPI flow cytometry geometric morphometrics hybridization karyology multivariate morphometrics taxonomy subg. Soraria
Druh dokumentu:	Kniha
Abstrakt:	Abstract: We describe a newly distinguished apomictic tetraploid (2n = 4x = 68) species Sorbus pauca M. Lepší et P. Lepší. We classify this new species as a member of the Sorbus hybrida group because we presume that it has originated from a cross between S. danubialis and S. aucuparia. Sorbus pauca, a stenoendemic that occurs on Bezděz and Malý Bezděz hills (Doksy region, northern Bohemia), is the first species of the S. hybrida group to be described for the Czech Republic. Multivariate morphometrics and elliptic Fourier analyses reveal that it is distinct from the morphologically close S. danubialis. The new taxon is phenotypicaly homogenous, morphologically well separated from the sympatrically occurring S. danubialis and European taxa of S. hybrida agg. It does not show any karyological variation. Apomixis was detected as the species’ sole mode of reproduction. The two known populations of S. pauca consist of 14 adult individuals. The species is restricted to rocky grasslands, rocky scrub and open woodlands on rocks with Festuca pallens and Cotoneaster integerrimus.
Databáze:	Katalog Knihovny AV ČR
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