1. Department of Botany, Faculty of Biology, Sofia University “St Kliment Ohridski”, Sofia, Bulgaria;
2. Institute of Botany, Faculty of Biology, University of Innsbruck, Innsbruck, Austria;
3. Functional Genetics Legumes Group, AgroBioInstitute, Agricultural Academy, Sofia, Bulgaria;
4. Molecular Genetics Group, AgroBioInstitute, Agricultural Academy, Sofia, Bulgaria