Chrtek, J. Jr, Zahrádníček, J., Krak, K., Fehrer, J. (2009): Genome size in Hieracium subgenus Hieracium (Asteraceae) is strongly correlated with major phylogenetic groups. Ann. Bot. 104: 161-178 [abstract]
Fehrer, J., Krak, K., Chrtek, J. Jr (2009): Intra-individual polymorphism in diploid and apomictic polyploid hawkweeds (Hieracium, Lactuceae, Asteraceae): disentangling phylogenetic signal, reticulation, and noise. BMC Evol. Biol. 9: 239
Suda, J., Krahulcová, A., Trávníček, P., Rosenbaumová, R., Peckert, T., Krahulec, F. (2007) Genome size variation and species relationships in Hieracium subgen. Pilosella (Asteraceae) as inferred by flow cytometry. Ann. Bot. 100: 1323-1335 [abstract]
Fehrer, J., Gemeinholzer, B., Chrtek, J. Jr, Bräutigam, S. (2007a): Incongruent plastid and nuclear DNA phylogenies reveal ancient intergeneric hybridization in Pilosella hawkweeds (Hieracium, Cichorieae, Asteraceae). Mol. Phylogen. Evol. 42: 347-361 [abstract]
Fehrer, J., Krahulcová, A., Krahulec, F., Chrtek, J. Jr., Rosenbaumová, R., Bräutigam. S. (2007b): Evolutionary aspects in Hieracium subgenus Pilosella. In: Grossniklaus, U., Hörandl, E., Sharbel, T., van Dijk, P. (eds.) Apomixis: Evolution, Mechanisms and Perspectives, Regnum Vegetabile 147, Koeltz, Königstein pp. 359-390 [abstract]
Peckert, T. & Chrtek, J. Jr.: Mating interactions among coexisting diploid, triploid and tetraploid cytotypes of Hieracium echioides (Asteraceae). - Folia Geobot., 41: 323-334 [abstract]
Wilson, L. M., Fehrer, J., Bräutigam, S., Grosskopf, G. (2006): A new invasive hawkweed, Hieracium glomeratum (Lactuceae, Asteraceae), in the Pacific Northwest. - Canad. J. Bot. 84: 133-142 [abstract][ corrected figure 5]
Fehrer, J., Šimek, R., Krahulcová, A., Krahulec, F., Chrtek, J. Jr., Bräutigam, E., Bräutigam, S. (2005): Evolution, hybridisation, and clonal distribution of apo- and amphimictic species of Hieracium subgen. Pilosella (Asteraceae: Lactuceae) in a Central European mountain range. In: F.T. Bakker, L.W. Chatrou, B. Gravendeel & P.B. Pelser: Plant species-level systematics: new perspectives on pattern & process. Regnum Vegetabile 143: 175-201. - Koeltz, Königstein. [abstract] (! size almost 4 MB !)
Mráz, P., Chrtek, J. Jun., Fehrer, J., Plačková, I. (2005): Rare recent natural hybridization in Hieracium s.str. - evidence from morphology, allozymes and chloroplast DNA. - Plant Syst. Evol. 255: 177-192. [abstract]
Chrtek, J. Jr., Mráz, P., Severa, M. (2004): Chromosome numbers in selected species of Hieracium s.str. (Hieracium subgen. Hieracium) in the Western Carpathians. - Preslia 76: 119-139. [abstract]
Krahulcová, A., Papoušková, S., Krahulec, F. (2004): Reproduction mode in the allopolyploid facultatively apomictic hawkweed Hieracium rubrum (Asteraceae, H. subgen. Pilosella). - Hereditas 141: 19-30. [abstract]
Krahulec, F., Krahulcová, A., Fehrer, J., Bräutigam, S., Plačková, I., Chrtek, J. Jr. (2004): The Sudetic group of Hieracium subgen. Pilosella from the Krkonoše Mts: a sythetic view. - Preslia 76: 223-243. [abstract]
Morgan-Richards, M., Trewick, S.A., Chapman, H.M., Krahulcová, A. (2004): Interspecific hybridization among Hieracium species in New Zealand: evidence from flow cytometry. - Heredity 93: 34-42. [abstract]
Štorchová, H., Chrtek, J. Jr., Bartish, I.V., Tetera, M., Kirschner, J., Štěpánek, J. (2002): Genetic variation in agamospermous taxa of Hieracium sect. Alpina (Compositae) in the Tatry Mts. (Slovakia). - Pl. Syst. Evol. 235: 1-17. [abstract]
Krahulcová, A., Krahulec, F., Chapman, H. M. (2000): Variation in Hieracium subgen. Pilosella: what do we know about its sources? - Folia Geobot. 35: 319-338. [abstract]
Štorchová, H., Hrdličková R., Chrtek, J. Jr., Tetera, M., Fitze, D., Fehrer, J. (2000): An improved method of DNA isolation from plants collected in the field and conserved in saturated NaCl/CTAB solution. - Taxon 49: 79-84. [abstract]
Krahulcová, A., Chrtek, J. Jr., Krahulec, F. (1999): Autogamy in Hieracium subgen. Pilosella. - Folia Geobot. 34: 373-376. [abstract]
Chrtek, J. Jr. (1997): Taxonomy of the Hieracium alpinum group in the Sudeten Mts. and the West and Ukrainian East Carpathians. - Folia Geobot. Phytotax. 32: 67-91. [abstract]
Chrtek, J. Jr., Marhold, K. (1998): Taxonomy of the Hieracium fritzei group (Asteraceae) in the Sudeten Mts. and the West Carpathians (Studies in Hieracium sect. Alpina II.). - Phyton (Horn) 37: 181-218. [abstract]
