his multi-authored book provides a comprehensive review of citrus breeding, including relevant genetics, molecular biology and biotechnology. Topics discussed include origin and Taxonomy, hybridization and see procedures, triploid breeding, mutation breeding, selection for fruit traits, tree characters and disease resistant, rootstock breeding, soil adaptation, nucellar embryony, cytogenetics, mapping, gene cloning, chromosome transfer technology, haploidy, flow cytometry and somaclonal variation. About the Author I. Khan, Sultan Qaboos University, Muscat.