Plant Breeding MethodsThis text has been compiled to provide an overview of how plant breeders develop cultivars of plant species. The methods that breeders use depend directly on the type of cultivar used to produce a commercial crop. The four most common types of cultivars are (a) clonal cultivars (b) synthetic cultivars (c) pure-line cultivars and (d) hybrid cultivars. These types of cultivars will be discussed throughout the book, alongside review questions for self-study. Throughout the text, references are made to a primary resource, Dr. Fehr's Principles of Cultivar Development. Vol. 1: Theory and Techniques. A scan of this 1991 publication is available in the Iowa State University Digital Repository with the author's permission as the copyright holder for his work.