Conservation of Dongxiang Wild Rice(Oryza rufipogon Griff.) Genetic Resources and Their Utilization in Breeding

Wild rice species are the important genetic resources in rice breeding.Dongxiang wild rice(Oryza rufipogon Griff.) is one of the species of the wild rice(Oryza rufipogon) resources.It is the economic activities that led to the loss of habitat,continuous deterioration of habitat quality,sustained reduction of habitat and invasion of exotic species.At present,some measures have been taken to protect wild rice,such as in situ conservation(on-site maintenance) and ex situ conservation(off-site maintenance).Dongxiang wild rice possesses many excellent characteristics,such as extreme cold tolerance,drought tolerance,endurance to poor soil,resistance to diseases and pests,strong regenerating capability,wide compatibility,cytoplasmic male sterility(CMS) and restoring capability.Some of these characteristics have been used in conventional rice breeding and hybrid rice breeding,and huge social and economic benefits have been achieved. Some other good characteristics need further study for utilization.