Research Progress on Genetic Diversity in Rice Based on SSR Marker Analysis

In this paper,we overviewed the research progress on constructing and evaluation of core collection,genetic structure,and origin and evolution in rice based on SSR marker analysis. The results such as zonal character of rice genetic diversity,genetic diversity closely related with ecological and geographical location,rice varieties genetic base was narrow,and rice genetic diversity was decreasing were summarized. Base on above informations we analyzed the genetic diversity cause and influence factors,and specifically pointed out that the breeding behavior reduced the rice genetic diversity,and offered countermeasures for current narrow genetic diversity in rice. The conclusions that Yunnan province was the richest center of genetic and gene diversity of rice in China,the west southern kept richest japonica rice varieties genetic diversity,and the japonica rice varieties genetic diversity of southern rice region was higher than that of northern rice region were suggestted.