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