Počet záznamů: 1

The Balkan endemic Picris hispidissima (Compositae): morphology, nuclear DNA content and relationship to the polymorphic P. hieracioides

  1. 1.
    0332143 - BU-J 2010 RIV AT eng J - Článek v odborném periodiku
    Slovák, M. - Urfus, Tomáš - Vít, Petr - Marhold, K.
    The Balkan endemic Picris hispidissima (Compositae): morphology, nuclear DNA content and relationship to the polymorphic P. hieracioides.
    [Balkánský endemit P. hispidissima: morfologie, obsah DNA a vztahy k polymorfnímu P. hieracioides.]
    Plant Systematics and Evolution. Roč. 278, 3-4 (2009), s. 187-201 ISSN 0378-2697
    Výzkumný záměr: CEZ:AV0Z60050516
    Klíčová slova: Balkan Peninsula * genome size * multivariate morphometrics
    Kód oboru RIV: EF - Botanika
    Impakt faktor: 1.410, rok: 2009

    The only Balkan endemic of the genus Picris, Picris hispidissima, was studied in detail using morphological and karyological methods. The species was shown to be morphologically distinct from the closest taxon, Picris hieracioides, by the pectinate–ciliate indumentum of involucral bracts, dilatation of the peduncle, length of the outer and inner bracts, and indumentum colour. No morphological variation that would require taxonomic classification was found within this species. Despite the diploid chromosome number (2n = 2x = 10) being confirmed for P. hispidissima, variation of up to 9.5% in genome size was found. The likely explanation for this variation is hybridization and introgression with closely related P. hieracioides. The most convincing evidence for this hypothesis is the detection of plants with two clearly different DNA contents arising from a single capitulum found in the location where P. hispidissima and P. hieracioides co-occur.

    Balkánský endemit Picris hispidissima byl potvrzen a byla zhodnocena jeho variabilita na mnoha úrovních. Jsou uvedeny vztahy k P. hieracioides.
    Trvalý link: http://hdl.handle.net/11104/0177475