0431004 - BÚ 2015 RIV CZ eng J - Článek v odborném periodiku
Vít, Petr - Wolfová, Kateřina - Urfus, Tomáš - Tájek, P. - Suda, Jan
Interspecific hybridization between rare and common plant congeners inferred from genome size data: assessing the threat to the Czech serpentine endemic Cerastium alsinifolium.
Preslia. Roč. 86, č. 1 (2014), s. 95-117. ISSN 0032-7786. E-ISSN 0032-7786
Institucionální podpora: RVO:67985939
Klíčová slova: interspecific hybridization * serpentine * Cerastium
Kód oboru RIV: EF - Botanika
Impakt faktor: 4.104, rok: 2014

Cerastium alsinifolium is an endemic species restricted to serpentine sites in the Slavkovský les Mts. Interspecific hybridization with sympatric C. arvense has long been suspected due to the substantial and continuous morphological variation. Both parental species differ considerably in the size of their monoploid nuclear genomes (~1.5-fold), which makes it easy to identify them. Flow cytometric investigation of more than 2200 Cerastium samples revealed five distinct genome size categories, corresponding to the two parental species and three types of interspecific hybrids. F1 interspecific hybrids were very common, which indicates the barriers to breeding between the parental species are weak. In contrast to a widely held view that C. alsinifolium mostly occurs on open serpentine outcrops, this habitat was dominated by interspecific hybrids.
Trvalý link: http://hdl.handle.net/11104/0235662