1. Department of Botany, Faculty of Science, Charles University, Prague, Czech Republic
2. Institute of Botany, Czech Academy of Sciences, Pruhonice, Czech Republic
3. Laboratory of Pollen Biology, Institute of Experimental Botany, Czech Academy of Science, Prague, Czech Republic
4. Department of Plant Experimental Biology, Faculty of Science, Charles University, Prague, Czech Republic
5. Department of Anthropology and Human Genetics, Faculty of Science, Charles University, Prague, Czech Republic
6. Berlin Institute for Medical Systems Biology, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany