The new type rice named hybrid rice that can be used for generations but do not need seed production every year was developed because of fixing heterosis, and the fixing heterosis of genetic and breeding. In this study,30 wild species were enrolled , O.longistaminate AgAg had the traits including rhizome reproduction, big anther with long stigma, small with uniformity for pollen grain, and with viability but self-incompatibility. The genetic of the hybrid of F2 and F3 population with uniformly agronomic traits that were continuous when developed from the cross of O.longistaminate AgAg and O.sativa AA, the population segregation and fixing hybrid that were very different from the inheritance which F2 and F3 generation separate individually and homozygosis after several generation of continuous self pollination named as Mendelian inheritance. The expression pattern of genetics was F1=F2=F3……=Fn and F1≌F2=F3……=Fn. The discovery was the first world record and showed the rule of inheritance of plant asexual reproduction and application of the genetic law of fixing heterosis to plant breeding that would save more than 2/3 time and material resources when hybridization between indica/wild rice, subspecies japonica and indica, and cultivars of japonica rice. This was the new way for plant breeding, for instance, japonica Zhongxin NO.1 (developed from F2 population of the japonica 84-15/Xingfeng cross) and indica hybrid rice NO.1(developed from F2 population of the Indica 90-3027/Fangdi cross) were recommended for commercialization in Beijing city and Hainan province.