Národní úložiště šedé literatury Nalezeno 5 záznamů.  Hledání trvalo 0.01 vteřin. 
Taxonomic principles, reproductive systems, population genetics and relationships within selected groups of genus Taraxacum (Asteraceae)
Zeisek, Vojtěch ; Kirschner, Jan (vedoucí práce) ; Richards, John (oponent) ; Majeský, Ľuboš (oponent)
Part I. Preface Chapter 3. Summary - shrnutí consistently, exclusively on the basis of morphological differences. The within-species mi- crosatellite variation corresponded to the mutational clone cluster hypothesis, with a single unclear result. Each microspecies consisted of one, more or less dominant, clone and several minority clones, each usually confined to a single plant. The Taraxacum flora of the West Himalaya represents one of the dandelion diversity hotspots, with at least 17 sections and about 150 known species. A number of names pub- lished from that region were referred to T. sect.Orientalia Handel-Mazzetti in the literature. All these names are revised and newly interpreted, with emphasis on plants erroneously determined as T. stenolepium. An nrDNA ITS sequence analysis including the only sexual member of T. section Squamulosa and the other sexual taxa known in Taraxacum shows a separate position of T. sect. Squamulosa. The new section is compared with sections Primigenia, Coronata and Orientalia. Taraxacum koksaghyz, dandelion from steppes of Kazakhstan, has been known for long time as potential rubber producer, possibly replacing currently the most popular rubber producing tropical tree Hevea brasiliensis. We evaluate its closely related congener, Tarax- acum bicorne. Its taxonomy is...

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