Research Progress on Genetic Diversity of Oryza rufipogon in China
Common wild rice (Oryza rufipogon Griff.) is recognized to be the ancestor of Asian cultivated rice (Oryza sativa L.).As one of the origins of Asian cultivated rice,China is rich of genetic resources of common wild rice.In order to provide scientific bases for studies on the origin,evolution and variety improvement of Asian cultivated rice as well as the conservation of common wild rice,a lot of studies on genetic diversity of common wild rice in China have been carried out to reveal the distribution of genetic diversity,population structure and evolutionary way of common wild rice for the last decades.This paper introduced the research methods and the application history of markers used in genetic diversity studies of common wild rice,systematically summarized the main characteristics of genetic diversity of common wild rice in China in several aspects including the abundance of genetic diversity of common wild rice,comparison of genetic diversity between common wild rice and Asian cultivated rice,the influence of geographic conditions and environments as well as gene flow from cultivated rice to the common wild rice.Based on the analyses of present studies,the authors provided their own opinion about the key points in the future research on genetic diversity of common wild rice in China.