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Efficient conservation of species endangered by introgressive hybridization with a special respect to genus Pulsatilla
Tröglerová, Aneta ; Urfus, Tomáš (advisor) ; Macková, Lenka (referee)
Interspecific hybridization is a common phenomenon within plants. It is considered a mechanism through which new adaptations and potentially new species arise. Interspecific crossing frequently occurs between closely related taxa. This bachelor thesis summarizes the knowledge of the effects and consequences of hybridization. In particular, negative influences such as demographic and genetic swamping are discussed. These are presented in the context of hybridization of rare species with more common and competitively stronger related taxa. Assessing the degree of interspecific crossing is important to determine an efficient conservation of endangered species. Furthermore, the work deals with selected species of the genus Pulsatilla (Pasque flower), specifically Pulsatilla patens, P. pratensis subsp. bohemica and P. vernalis, which are potentially endangered by hybridization. Populations of Pasque flower have been rapidly decreasing in recent decades not only in the Czech Republic but also throughout Europe. In addition, they are willing to hybridize with each other, which is a problem for their conservatoin. Keywords Interspecific hybridization, demographic swamping, genetic swamping, flow cytometry, Pulsatilla
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