Many of the crops widely grown today stem from a very narrow genetic base, understanding and preserving crop genetic resources is vital to the security of food systems worldwide. Plant Breeding Reviews presents state-of-the-art reviews on plant genetics and the breeding of all types of crops by both traditional means and molecular methods. The emphasis on this landmark series is on methodology, a fundamental understanding of crop genetics, and applications to major crops. Coverage includes a wide range of crops: row crops, fruits, vegetables, nuts, and trees grown for timber and pulp. Numerous references provide easy, time-saving, and cost-effective access to the primary literature.