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《Scientia Agricultura Sinica》 2009-10
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Analysis of Genetic Similarity of Improved Japonica Rice Varieties from Different Provinces in China

SHU Ai-ping 1,2,3,ZHANG Yuan-yuan1,CAO Gui-lan1,LU Qin2,ZHANG San-yuan4,HAN Long-zhi1 (1Institute of Crop Sciences,Chinese Academy of Agricultural Sciences/The National Key Facility for Crop Gene Resources and Genetic Improvement,NFCRI/Key Laboratory of Crop Germplasm Resources and Biotechnology,Ministry of Agriculture,Beijing 100081; 2College of Crop Science,Fujian Agricultural and Forestry University,Fuzhou 350002; 3Rice Research Institute,Jiangxi Academy of Agricultural Sciences,Nanchang 330200; 4Institute of Rice Research,Jilin Academy of Agricultural Sciences,Gongzhuling 136100,Jilin)  
【Objective】 The genetic similarity and genetic difference among improved japonica rice varieties from different provinces of China were analyzed. The aim is to provide genetic basis for the breeding of japonica rice varieties. 【Method】 The genetic similarity and cluster of 139 accessions of improved japonica rice variety from 12 provinces of China were analyzed using 34 SSR markers. 【Result】 Totally 198 alleles were detected among these improved japonica rice varieties with the average number of alleles per pair of primers was 5.3235. RM320,RM531,RM1,RM286 and RM336 showed more alleles,which were 15,12,11,9 and 9,respectively. RM320,RM336,RM286 and RM531 showed higher genetic diversity indexes,which were 2.3324,2.0292,1.8996 and 1.7820,respectively. The range of genetic similar index among improved japonica rice varieties from different provinces was from 0.321 to 0.914,with the average of 0.686. There is a high genetic similarity among improved japonica rice varieties from Heilongjiang,Jilin,Liaoning,Ningxia,and Yunnan,which were located in similar latitude or similar ecological environment,while there is a low genetic similarity between improved japonica rice germplasm from Guizhou and Jiangsu,and those of other provinces,which located in more different latitudes and ecological environments. 【Conclusion】 The marker of RM320,RM531,RM1,RM286,and RM336 fit to be used in analysis of genetic diversity for improved japonica rice variety. The genetic similarity among improved japonica rice varieties from different provinces was closely associated with genetic basis of parents,and was also correlated with latitude and ecological environment where the varieties were bred.
【Fund】: 国家科技支撑项目(2006BAD13B01);; 作物种质资源保护项目[NB07-2130135(25-30)-01];; 国家科技基础条件平台项目(2005DKA21001-01)
【CateGory Index】: S511.22
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