Abstract:

Dongxiang wild rice (DXWR), containing massive excellent characters and advantageous genes, is a precious germplasm resource for genetic improvement of cultivars. However, DXWR is critically threatened with dramatic decrease and even extinction, thus it is extremely urgent to evaluate and conserve genetic diversity of surviving DXWR. Researches on genetic diversity of DXWR are important to dissect its evolution mechanism and to enhance its utilization in rice breeding program. From several angles of different conservations, various years, different generations, other ecological types of wild rice and cultivars, therefore, this paper briefly reviews the recent progress on genetic diversity of DXWR and its endangered status. Through analysis of the current problems, the authors consider that it is supposed to establish a scientific and unified evaluation system for genetic diversity, and point out prospects of further studies on genetic diversity in DXWR and its corresponding ecological conservation.