Rolf H. J. Schlegel, Ph.D., D.Sc., is Professor of Cytogenetics and Applied Genetics, with over thirty years of experiences in research and teaching of advanced genetics and plant breeding in Germany and Bulgaria. Prof. Schlegel is the author of more than 150 research papers and other 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, 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 Institute of Plant Biotechnology and Genetic Engineering, Sofia, Bulgaria. He was working as R & D director in a private company in Germany, and is now retired.