Conventional plant breeding has significantly improved crop yield, disease resistance, and adaptability to the environment; however, it is difficult to cultivate breakthrough new varieties using conventional breeding techniques. As such, new and novel breeding techniques are being developed. This book presents a comprehensive overview of plant breeding. It is organized into four sections on 'Genetic Resources for Plant Breeding”, 'Breeding Theory and Strategy”, 'Breeding Practice and Cases”, and 'The Perspective for Plant Breeding”.