National Repository of Grey Literature 5 records found  Search took 0.01 seconds. 
Homoploid hybrid speciation in closely related taxa of wetland plants
Píšová, Soňa ; Fér, Tomáš (advisor) ; Albach, Dirk Carl (referee) ; Koutecký, Petr (referee)
6 Summary Wetland plants share several common characters, such as clonality, wind pollination and self-compatibility that facilitate hybridization, especially in complexes of closely related taxa. In this thesis, a Sparganium erectum complex of four subspecies and 14 species of the genus Bolboschoenus were investigated to detect hybridization and verify the origins of putative hybrids. The first part of the thesis is dedicated to an introduction to hybridization, a process of great evolutionary impact, and its several general consequences, which are broadly discussed with numerous examples. In addition, an introduction to the studied taxa is provided as well as the main results of three papers that are presented and discussed herein. The second part of the thesis consists of three papers on hybridization within the Sparganium erectum aggregate (Paper I) and in the genus Bolboschoenus (Paper II, central European species; Paper III all 14 species worldwide). AFLP molecular marker analysis, sequencing of nuclear and chloroplast DNA, and genome size and morphometric analyses were applied to elucidate the genetic relationships among taxa and to confirm the suitability of morphometric characters for taxa and hybrid delimitation. The results clearly present the differentiation of individual taxa and their stable...
Homoploid hybrid speciation in closely related taxa of wetland plants
Píšová, Soňa
6 Summary Wetland plants share several common characters, such as clonality, wind pollination and self-compatibility that facilitate hybridization, especially in complexes of closely related taxa. In this thesis, a Sparganium erectum complex of four subspecies and 14 species of the genus Bolboschoenus were investigated to detect hybridization and verify the origins of putative hybrids. The first part of the thesis is dedicated to an introduction to hybridization, a process of great evolutionary impact, and its several general consequences, which are broadly discussed with numerous examples. In addition, an introduction to the studied taxa is provided as well as the main results of three papers that are presented and discussed herein. The second part of the thesis consists of three papers on hybridization within the Sparganium erectum aggregate (Paper I) and in the genus Bolboschoenus (Paper II, central European species; Paper III all 14 species worldwide). AFLP molecular marker analysis, sequencing of nuclear and chloroplast DNA, and genome size and morphometric analyses were applied to elucidate the genetic relationships among taxa and to confirm the suitability of morphometric characters for taxa and hybrid delimitation. The results clearly present the differentiation of individual taxa and their stable...
Homoploid hybrid speciation in closely related taxa of wetland plants
Píšová, Soňa
6 Summary Wetland plants share several common characters, such as clonality, wind pollination and self-compatibility that facilitate hybridization, especially in complexes of closely related taxa. In this thesis, a Sparganium erectum complex of four subspecies and 14 species of the genus Bolboschoenus were investigated to detect hybridization and verify the origins of putative hybrids. The first part of the thesis is dedicated to an introduction to hybridization, a process of great evolutionary impact, and its several general consequences, which are broadly discussed with numerous examples. In addition, an introduction to the studied taxa is provided as well as the main results of three papers that are presented and discussed herein. The second part of the thesis consists of three papers on hybridization within the Sparganium erectum aggregate (Paper I) and in the genus Bolboschoenus (Paper II, central European species; Paper III all 14 species worldwide). AFLP molecular marker analysis, sequencing of nuclear and chloroplast DNA, and genome size and morphometric analyses were applied to elucidate the genetic relationships among taxa and to confirm the suitability of morphometric characters for taxa and hybrid delimitation. The results clearly present the differentiation of individual taxa and their stable...
Homoploid hybrid speciation in closely related taxa of wetland plants
Píšová, Soňa ; Fér, Tomáš (advisor) ; Albach, Dirk Carl (referee) ; Koutecký, Petr (referee)
6 Summary Wetland plants share several common characters, such as clonality, wind pollination and self-compatibility that facilitate hybridization, especially in complexes of closely related taxa. In this thesis, a Sparganium erectum complex of four subspecies and 14 species of the genus Bolboschoenus were investigated to detect hybridization and verify the origins of putative hybrids. The first part of the thesis is dedicated to an introduction to hybridization, a process of great evolutionary impact, and its several general consequences, which are broadly discussed with numerous examples. In addition, an introduction to the studied taxa is provided as well as the main results of three papers that are presented and discussed herein. The second part of the thesis consists of three papers on hybridization within the Sparganium erectum aggregate (Paper I) and in the genus Bolboschoenus (Paper II, central European species; Paper III all 14 species worldwide). AFLP molecular marker analysis, sequencing of nuclear and chloroplast DNA, and genome size and morphometric analyses were applied to elucidate the genetic relationships among taxa and to confirm the suitability of morphometric characters for taxa and hybrid delimitation. The results clearly present the differentiation of individual taxa and their stable...
Origin of species by interspecific hybridization in animals
Štiková, Jana ; Reifová, Radka (advisor) ; Choleva, Lukáš (referee)
Speciation mostly occur by splitting an ancestral species into two daughter species. Alternatively, new species may arise by hybridization, a phenomenon known as hybrid speciation. This type of speciation is frequent especially in plants, but recently, a growing number of example has been described also in animals. The aim of this thesis is to summarize the current knowledge about hybrid speciation and describe known examples of hybrid speciation in animals. Hybrid speciation in animals is mostly homoploid, e.g. without the change of number of chromosomes. I found 23 homoploid hybrid species in animals. Most of them belong to insects and fishes, but know examples are also among birds and mammals. Origin of species in animals by hybrid speciation seems to be more commons than was previously thought. Powered by TCPDF (www.tcpdf.org)

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