Plant breeding aims to bring together in a single population, called a variety, the maximum number of favorable genetic traits to better meet the demands of agriculture, users of agricultural production and society. This book presents today's plant breeding methods and tools in simple, concise terms, and answers three questions: What is a variety in plant breeding? What methods and tools are available to the breeder? How is a variety created? The book concludes with a description of the supply chain set up to ensure that the seeds of selected varieties are the vehicle of genetic progress. This book is aimed at non-specialists with an interest in genetics and plant breeding, and a basic understanding of biology: high school students and their biology teachers; graduate students who are studying plant breeding, and their teachers; technicians, engineers and managers of plant breeding programs; and all professionals wishing to have an overview of the plant breeding tools available today.