Wild rice(Oryza rufipogon)has been recognized as the ancestor of Asian cultivated rice(Oryza sativa).However,where and how cultivated rice originated from wild rice has been debated for a long time in the world.Moreover,whether the two subspecies of Asian cultivated rice,indica and japonica,were domesticated with the ways of single origin or multiple origins was still considerably controversial,and whether they originated from China or aboard was still the focus of debate among international scholars.In thi...