Institute of Plant Molecular Biology, Laboratory of Molecular Cytogenetics, Branisovská 31, Ceské Budejovice, CZ-37005, Czech Republic. macas@umbr.cas.cz|Institute of Plant Molecular Biology, Laboratory of Molecular Cytogenetics, Branisovská 31, Ceské Budejovice, CZ-37005, Czech Republic. macas@umbr.cas.cz|Institute of Plant Molecular Biology, Laboratory of Molecular Cytogenetics, Branisovská 31, Ceské Budejovice, CZ-37005, Czech Republic. macas@umbr.cas.cz