# Chromosome numbers and reproductive systems of selected representatives of *Pilosella *from the Krkonoše Mts (the Sudetes Mts). Part 3.

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Anna Krahulcová
^{}
^{1}
,
František Krahulec
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^{1}
,
Siegfried Bräutigam
^{}
^{2}
&
Jindřich Chrtek Jr.
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^{2}

#### Affiliations

- Institute of Botany, Academy of Sciences of the Czech Republic, Zámek 1, CZ-252 43 Průhonice, Czech Republic
- Senckenberg Museum für Naturkunde Görlitz, Postfach D-300154, 02806 Görlitz, Germany

Published: 21 April 2013

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#### Abstract

Chromosome counts/DNA ploidy level (DNA-PL) and modes of reproduction of the following species, hybridogenous species and hybrids of *Pilosella *from the Krkonoše Mts (Czech Republic) are reported: *P. aurantiaca *(2n = 36, 2n = 45, DNA-PL tetraploid, pentaploid, all apomictic); *P. bauhini *subsp. *bauhini *(2n = 45, with a long hemizygous marker chromosome – MC, apomictic); *P. caespitosa *(2n = 36, 2n = 45, apomictic, both cytotypes MC); *P. cymosa *subsp. *vaillantii *(2n = 45, MC); *P. lactucella *(2n = 18, DNA-PL diploid); *P. officinarum *(2n = 36, sexual); *P. blyttiana *(2n = 36); *P. floribunda *(2n = 36, MC); *P. glomerata *(DNA-PL tetraploid, 2n = 45, MC, apomictic, 2n = 46, MC); *P. iserana *(2n = 35 + fragment, MC, 2n = 36, MC, DNA-PL tetraploid,, apomictic); *P. piloselliflora *(2n = 36, DNA-PL pentaploid); *P. rubra *(2n = 54); *P. schultesii *(2n = 36); *P. rothiana *(2n = 36, apomictic); *P. scandinavica *(2n = 36, MC, apomictic). In addition, a heptaploid plant (2n = 63, apomictic), probably a hybrid between *P. rubra *(2n = 54, reduced gamete) and *P. aurantiaca *(2n = 36, unreduced gamete) and a rare hybrid corresponding morphologically to *P. fusca *(2n = 36, apomictic), which is probably a hybrid between *P. aurantiaca *and *P. blyttiana*, were found. The latter hybrid has not been previously reported from the Krkonoše Mts or the Czech Republic. New data for *P. cymosa *subsp. *vaillantii*, *P. fusca*, *P. rothiana *and *P. scandinavica *for this mountain range are presented. It is shown that tetraploid and pentaploid *P. aurantiaca *differ in the number and shape of their stem leaves, which makes it easier to identify them in the field.

#### Keywords

chromosome numbers, DNA ploidy level, Hieracium, hybridization, Pilosella, reproductive systems

#### How to cite

Krahulcová A., Krahulec F., Bräutigam S. & Chrtek J. Jr. (2013) Chromosome numbers and reproductive systems of selected representatives of *Pilosella *from the Krkonoše Mts (the Sudetes Mts). Part 3. – Preslia 85: 179