Chemical hybridizing agent is a new technology system.Chemical hybridizing agent utilizing heterosis,relates to agriculture and chemistry subject areas.This book discussed two topics that revolves around the rape of chemical hybridizing agent and Heterosis of Brassica napus using.A total of ten chapters,there are respectively introduced heterosis in oil rape,chemical hybridizing hybrids:advantages and applications,approaches to heterosis utilization in oil rape,chemical hybridizing agents for oil rape,cytological basis of chemical emasculation in oil rape,biochemical and molecular biological mechanisms of CHA action,breeding the elite inbred line of oil rape,principles of parent selection for hybrid rapeseed,technology for the production of CHA hybrid seeds of oil rape,major CHA hybrid varieties of oil rape. This book provides a reference for scientific and technical researchers,and college students and professors who work on plants applied chemistry research and plant breeding,especially work on rapeseed research,hybrid seed production and other relevant aspects.