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Název:
Gene flow and its consequences for microevolution in Taraxacum (Asteraceae)
Překlad názvu: Gene flow and its consequences for microevolution in Taraxacum (Asteraceae)
Autoři: Mártonfiová, Lenka ; Štěpánek, Jan (vedoucí práce) ; Krahulec, František (oponent) ; Sharbel, Timothy F. (oponent)
Typ dokumentu: Disertační práce
Rok: 2009
Jazyk: eng
Abstrakt: [7] Summary Microevolution refers to evolutionary changes at or below the species level. These changes are the result of mutation, natural selection, gene flow and genetic drift. When microevolutionary processes in agamic complexes, like Taraxacum, are studied, gene flow deserves special attention. Taraxacum is very large and widespread genus with a very complicated taxonomy. It forms a polyploid series with basic chromosome number x=8, diploids (obligate sexuals) and triploids (apomicts) prevail. The presented work studies reproductive behaviour and pathways of the gene flow in Taraxacum sect. Ruderalia and compares it with Taraxacum sect. Erythrosperma. Diploid, triploid and tetraploid individuals were sampled from mixed diploid - polyploid natural populations of Taraxacum sect. Ruderalia, diploids and triploids from Taraxacum sect. Erythrosperma. Seeds resulting both from the crosses between particular ploidy levels, from isolated anthodia and from open pollinated anthodia (from cultivated and wild plants) were subjected to the flow-cytometric seed screening (FCSS) to determine ploidy levels in the progeny and to infer breeding behaviour of maternal plants. Three possible pathways of the gene flow were studied: (A) fertilization of sexuals by pollen of apomicts, (B) BIII (2n+n) hybrid formation, (C)...
Instituce: Fakulty UK (VŠKP) (web)
Informace o dostupnosti dokumentu: Dostupné v digitálním repozitáři UK.
Původní záznam: http://hdl.handle.net/20.500.11956/92918
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-369563
Záznam je zařazen do těchto sbírek:
Školství > Veřejné vysoké školy > Univerzita Karlova > Fakulty UK (VŠKP)
Vysokoškolské kvalifikační práce > Disertační práce
Překlad názvu: Gene flow and its consequences for microevolution in Taraxacum (Asteraceae)
Autoři: Mártonfiová, Lenka ; Štěpánek, Jan (vedoucí práce) ; Krahulec, František (oponent) ; Sharbel, Timothy F. (oponent)
Typ dokumentu: Disertační práce
Rok: 2009
Jazyk: eng
Abstrakt: [7] Summary Microevolution refers to evolutionary changes at or below the species level. These changes are the result of mutation, natural selection, gene flow and genetic drift. When microevolutionary processes in agamic complexes, like Taraxacum, are studied, gene flow deserves special attention. Taraxacum is very large and widespread genus with a very complicated taxonomy. It forms a polyploid series with basic chromosome number x=8, diploids (obligate sexuals) and triploids (apomicts) prevail. The presented work studies reproductive behaviour and pathways of the gene flow in Taraxacum sect. Ruderalia and compares it with Taraxacum sect. Erythrosperma. Diploid, triploid and tetraploid individuals were sampled from mixed diploid - polyploid natural populations of Taraxacum sect. Ruderalia, diploids and triploids from Taraxacum sect. Erythrosperma. Seeds resulting both from the crosses between particular ploidy levels, from isolated anthodia and from open pollinated anthodia (from cultivated and wild plants) were subjected to the flow-cytometric seed screening (FCSS) to determine ploidy levels in the progeny and to infer breeding behaviour of maternal plants. Three possible pathways of the gene flow were studied: (A) fertilization of sexuals by pollen of apomicts, (B) BIII (2n+n) hybrid formation, (C)...
Instituce: Fakulty UK (VŠKP) (web)
Informace o dostupnosti dokumentu: Dostupné v digitálním repozitáři UK.
Původní záznam: http://hdl.handle.net/20.500.11956/92918
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-369563
Záznam je zařazen do těchto sbírek:
Školství > Veřejné vysoké školy > Univerzita Karlova > Fakulty UK (VŠKP)
Vysokoškolské kvalifikační práce > Disertační práce
Záznam vytvořen dne 2017-11-08, naposledy upraven 2022-03-04.