关键词: 籼稻, 地方品种, 遗传距离, 亲缘关系, 地理来源, 微卫星标记

Abstract:

The genetic diversity of rice parents in rice breeding was not enough at present. Rice germplasm recourse is abundance in China and can be found everywhere, it is very important to utilize rice germplasm effectively. The relationships among indica local rices from different places of China was studied in order to give the principle of rice breeding. SSR analysis for 440 indica local rices selected from 14 provinces of China was conducted with 61 microsatellite markers, and genetic distance and dendrogram ot them among different provinces, longitudes and latitudes were analyzed. Relationships for indica local rice of different provinces, different longitudes and different latitudes were compared. The results indicated that the genetic distance of indica local rice among provinces ranged from 0.0707 to 0.4076; the genetic distance among different longitudes ranged from 0.0680 to 0.3032; the genetic distance among different latitudes ranged from 0.0385 to 0.2696. The indica local rice varieties located on contiguous province, longitude and latitude were basically clustered into same group, it had nearer genetic distance and relatives, while these located on more far geographic area were basically clustered into different groups, with farther genetic distance and relatives. The results showed there was close correlation between relatives and geographic location. The variance of genetic distance for indica local rice sorted according to the longitude and latitude was smaller than that according to province. Therefore, it is more reasonable to analyze genetic diversity of indica local rice grouping according to longitude and latitude than to province.

Key words: Indica, Local rice, Genetic distance, Relatives, Geography place, Microsatellite marker