Heterosis phenomenon is existed commonly in living nature. Utilizing heterosis is one of the most effective ways to increase yield and improve quality in crops. In order to apply heterosis more efficiently, scientists have been made great effort for a long time to probe into the genetic basis for heterosis. Rapeseed is one of the most important crops, and is also one of the most successful crops in heterosis utilization worldwide. To explore the sources of heterosis and mapping QTLs ( quantitative trait loc...