Considerable interest has developed in recent years in crucifers and particularly in their wild relatives, as they contain genetic material that may be utilized for development of superior crop varieties. Bringing together contributions of leading international experts, this book includes research on biology, breeding, and the genetic diversity of the brassica species. It provides information on the evolution and phylogenies of crucifers, cytogenetics, floral variations, male sterility, biotechnology and haploidy breeding in crucifers. It also explores the possibilities of utilizing genes from wild variations into commercial agricultural crops.