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Interspecific hybridization between Pulsatilla pratensis and P. patens
Krejčová, Nikol ; Suda, Jan (advisor) ; Kaplan, Zdeněk (referee)
This thesis deals with interspecific hybridization in sympatric populations of Pulsatilla patens and P. pratensis. The key aim was to assess karyological and phenotypic variation in the study group. DNA flow cytometry revealed three non-overlapping groups of genome sizes, corresponding to P. patens, P. × hackelii and P. pratensis. The frequency of interspecific hybridization was low, accounting to approx. 3% of analyzed plants. Morphometric analyses identified a set a reliable species-specific characters, including number of divisions the leaf, length of petiole the part of leaf, number of smaller parts of leaf and colour of blossom. Although the majority of hybrid individuals flowered and set fruits, their fertility was reduced considerably. The threat from interspecific hybridization to parental species is therefore rather low.
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Interspecific hybridization between Pulsatilla pratensis and P. patens
Krejčová, Nikol ; Suda, Jan (advisor) ; Kaplan, Zdeněk (referee)
This thesis deals with interspecific hybridization in sympatric populations of Pulsatilla patens and P. pratensis. The key aim was to assess karyological and phenotypic variation in the study group. DNA flow cytometry revealed three non-overlapping groups of genome sizes, corresponding to P. patens, P. × hackelii and P. pratensis. The frequency of interspecific hybridization was low, accounting to approx. 3% of analyzed plants. Morphometric analyses identified a set a reliable species-specific characters, including number of divisions the leaf, length of petiole the part of leaf, number of smaller parts of leaf and colour of blossom. Although the majority of hybrid individuals flowered and set fruits, their fertility was reduced considerably. The threat from interspecific hybridization to parental species is therefore rather low.
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Phytosociological study of vegetation PR "Holý vrch u Hlinné" (district Litoměřice)
BARCALOVÁ, Eliška
The topic of my bachelor's thesis is a study of the vegetation of the nature reserve "Holý vrch u Hlinné". The objective is discovery of influence to biotope, height above sea level, saint and exposition of slope to endangered species of Pulsatilla patens, Pulsatilla pratensis subsp. bohemica and their hybrid Pulsatilla x hackelii. Any relation between external influences and Pulsatilla´s growing areas wasn´t proved. The most frequent species was Pulsatilla pratensis subsp.bohemica with total number of clumps 63 and number of flowers 168, then species Pulsatilla patens with 24 clumps and 37 flowers and the least was hybrid Pusatilla x hackelii sith with 4 clumps and 10 flowers. Reaction of pH soil in location were acid and any relation between influence to Pullsatilla's wasn't prove. The output of the work is also a map, where are recorded the locations and comparison with previous researches. Present situation is compare with the latest researches.
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