This textbook covers basic principles in the genetic improvement of crop plants. Emphasis is placed on methods of cultivar development in self-pollinating, cross-pollinating, and asexually propagating...This textbook covers basic principles in the genetic improvement of crop plants. Emphasis is placed on methods of cultivar development in self-pollinating, cross-pollinating, and asexually propagating crops. Relevant examples of crop improvement research in Africa are utilized to cover factors affecting cultivar release, multiplication, and distribution of high-quality seed.