Search Results - "Chrtek, J"

Reconstruction of phylogenetic relationships in a highly reticulate group with deep coalescence and recent speciation (Hieracium, Asteraceae) by Krak, K, Caklová, P, Chrtek, J, Fehrer, J

“…Phylogeny reconstruction based on multiple unlinked markers is often hampered by incongruent gene trees, especially in closely related species complexes with…”
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Evolution of apomixis loci in Pilosella and Hieracium (Asteraceae) inferred from the conservation of apomixis-linked markers in natural and experimental populations by Hand, M L, Vít, P, Krahulcová, A, Johnson, S D, Oelkers, K, Siddons, H, Chrtek, Jr, J, Fehrer, J, Koltunow, A M G

“…The Hieracium and Pilosella (Lactuceae, Asteraceae) genera of closely related hawkweeds contain species with two different modes of gametophytic apomixis…”
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Can obligate apomixis and more stable reproductive assurance explain the distributional successes of asexual triploids in Hieracium alpinum (Asteraceae)? by Mráz, P, Zdvořák, P, Hartmann, M, Štefánek, M, Chrtek, J

“…Although reproductive assurance has been suggested to be one of the most important factors shaping the differential distributional patterns between sexuals and…”
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Loss of genetic diversity in isolated populations of an alpine endemic Pilosella alpicola subsp. ullepitschii: effect of long-term vicariance or long-distance dispersal? by Šingliarová, B, Chrtek, J. Jr, Mráz, P

“…Pilosella alpicola subsp. ullepitschii (Asteraceae) is a strictly allogamous, diploid Carpathian endemic. Its distribution range comprises two areas separated…”
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Rare recent natural hybridization in Hieracium s. str. — evidence from morphology, allozymes and chloroplast DNA by Mráz, P., Chrtek, J., Fehrer, J., Plačková, I.

“…The first proven data on natural hybridization in the genus Hieracium s. str. are presented. Plants with intermediate morphological characters between the…”
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Loss of genetic diversity in isolated populations of an alpine endemic Pilosella alpicola subsp. ullepitschii: effect of long-term vicariance or long-distance dispersal? by Šingliarová, B., Chrtek, J., Mráz, P.

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Genetic variation in agamospermous taxa of Hieracium sect. Alpina (Compositae) in the Tatry Mts. (Slovakia) by Štorchová, H., Chrtek, J., Bartish, I. V., Tetera, M., Kirschner, J., Štěpánek, J.

“…The mode of reproduction, pollen production, chromosome numbers, genetic variation (RAPD, allozymes) and overall similarity were studied in 6 species of…”
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Loss of genetic diversity in isolated populations of an alpine endemic Pilosellaalpicola subsp. ullepitschii: effect of long-term vicariance or long-distance dispersal? by Šingliarová, B., Chrtek, J., Mráz, P.

“…Pilosella alpicola subsp. ullepitschii (Asteraceae) is a strictly allogamous, diploid Carpathian endemic. Its distribution range comprises two areas separated…”
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Loss of genetic diversity in isolated populations of an alpine endemic Pilosellaalpicola subsp. ullepitschii: effect of long-term vicariance or long-distance dispersal? by Šingliarová, B., Chrtek, J., Mráz, P.

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Morphological and allozyme diversity in the Hieracium nigrescens group (Compositae) in the Sudety Mountains and the Western Carpathians by CHRTEK, JINDŘICH JR, TONKOVÁ, MARTINA, MRÁZ, PATRIK, MARHOLD, KAROL, PLAČKOVÁ, IVANA, KRAHULCOVÁ, ANNA, KIRSCHNER, JAN

“…The overall pattern of morphological variation and genetic diversity (allozyme analysis) was studied in the Hieracium nigrescens group (H. nigrescens s.l., H…”
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An Improved Method of DNA Isolation from Plants Collected in the Field and Conserved in Saturated NaCl/CTAB Solution by Štorchová, Helena, Hrdličková, Radmila, Chrtek, Jindřich, Tetera, Martin, Fitze, Dorothee, Fehrer, Judith

“…A simple method for isolation of genomic DNA from wild plants sampled in remote field areas is presented. The protocol combines NaCl/CTAB leaf preservation…”
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Loss of genetic variation in geographically marginal populations of Atriplex tatarica (Chenopodiaceae) by Mandak, B, Bimova, K, Plackova, I, Mahelka, V, Chrtek, J

“…BACKGROUND AND AIMS: Genetic variability was estimated for Atriplex tatarica from 25 populations in the Czech Republic. Since its north-western range margin is…”
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Taxonomy of the Hieracium alpinum Group in the Sudeten Mts., the West and the Ukrainian East Carpathians by Jindřich Chrtek, Jun

“…A taxonomic revision of the Hieracium alpinum group (sensu Flora Europaea) in the Sudeten Mts., the West and the Ukrainian East Carpathians is provided. Six…”
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Autogamy in Hieracium Subgen. Pilosella by Anna Krahulcová, Chrtek, Jindřich, Krahulec, František

“…The presence of autogamy in Hieracium subgen. Pilosella is reported for diploid H. lactucella and tetraploid H. pilosella. Self-compatibility is induced under…”
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Species Concept in Agamic and Autogamic Complexes by Chrtek, Jindřich, Marhold, Karol

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Chromosome Numbers in Selected Hieracium Species in the Krkonoše Mts. (The West Sudeten) by Jindřich Chrtek, Jun

“…Chromosome numbers are given of 15 species of the genus Hieracium L. s. str., representing seven species groups (in the sense of Flora Europaea, roughly…”
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Notes on the Synanthropic Plants of Egypt 3. Grammica campestris and Other Species of Family Cuscutaceae by Chrtek, Jindřich, Osbornová, Jana

“…Species of family Cuscutaceae belonging to three genera, viz. Grammica, Monogynella and Cuscuta s. str. were studied in Egypt, some of them also in Iraq…”
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Taxonomic observations on some species of the genus Parietaria by Chrtek, J

“…Taxonomy and distribution of Parietaria serbica Panč., P. lusitanica L., P. micrantha Lebed. and P. mauritanica Dur. is briefly discussed. P. serbica is an…”
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Flora Nordica 2. Chenopodiaceae: Fumariaceae by Chrtek (J. Ch.), Jindřich

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Bemerkungen zur Gliederung der Gattung Urtica L by Chrtek, J

“…In der vorliegenden Arbeit ist die Gattung Urtica L. in drei Untergattungen zergliedert - subgenus Urtica, subgenus Sarcourtica Chrtek, subgenus Dendrourtica…”
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