Rolf H. J. Schlegel, Ph.D., is Professor of Cytogenetics and Applied Genetics, with over 50 years of experience in research and teaching of advanced genetics and plant breeding in Germany and Bulgaria. Prof. Schlegel is the author of more than 160 research papers, monographs, and scientific contributions, co-coordinator of international research projects, and has been a scientific consultant at the Bulgarian Academy of Agricultural Sciences for several years. He received his Master's degree in Agriculture and Plant Breeding, and his Ph.D. and D.Sc. in Genetics and Cytogenetics from the Martin-Luther University Halle/S., Germany. Later he became Head of Laboratory of Chromosome Manipulation and the Department of Applied Genetics and Genetic Resources at the Institute of Plant Genetics and Crop Plant Research, Gatersleben, Germany, and the Head of the Genebank at the Institute of Wheat and Sunflower Research, General Toshevo/Varna, as well as at the AgroBioInstitute, Sofia, Bulgaria. He is now emeritus of the institute.