Plant Breeding Reviews, Volume 20

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. 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. The emphasis of the series is on methodology, a fundamental understanding of crop genetics, and applications to major crops. Dedication: Normal Willison Simmonds: Plant Breeder, Teacher,Administrator (W. Spoor & F. England).

The Origin of Maize: Evidence for Tripsacum Ancestry (M.Eubanks).

History of Public Onion Breeding Programs in the United States (I.Goldman, et al.).

Current and Future Issues in Lettuce Breeding (E. Ryder).

Cactus Pear Domestication and Breeding (C. Jacobo).

Somatic Hybridization and Applications in Plant Breeding (A.Johnson & R. Veilleux).

Indexes. Jules Janick is the James Troop Distinguished Professor of Horticulture at Purdue University in West Lafayette, IN, USA.