Karyotaxonomic analysis of the genusBunium (Umbelliferae)

Autor:	E. V. Kljujkov, M. G. Vasil'eva, Michael G. Pimenov
Rok vydání:	1985
Předmět:	biology Middle asia Chromosome Aneuploidy Karyotype Plant Science medicine.disease biology.organism_classification Genus Evolutionary biology Centromere Botany medicine Bunium Ecology Evolution Behavior and Systematics
Zdroj:	Plant Systematics and Evolution. 149:71-88
ISSN:	1615-6110 0378-2697
DOI:	10.1007/bf00984155
Popis:	Chromosome numbers are reported for 23 species of the genusBunium, distributed mainly in Middle Asia and Transcaucausia. The great diversity of basic chromosome numbers is unusual for a genus ofUmbelliferae: x = 11, 10, 9, 8, 7, and 6. This series obviously has to be interpreted as descending dysploidy. Infraspecific aneuploidy was found in three species, but there are no B-chromosomes or polyploidy. The karyotypes of 18 species are described, using two morphometric chromosome parameters, centromere position and relative length (Table 2), and illustrated (Figs. 2–4). Species vary greatly in their karyotype asymmetry (20.4–45.9%). Chromosome numbers and structures appear to be useful in the karyotaxonomical and biogeographical analysis of the genus.
Databáze:	OpenAIRE
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