Abstract:

Mastering genetic polymorphism of rice varieties mainly popularized in Hanzhong, understanding their genetic background, clearing the relationship between all varieties. The genetic diversity of 20 rice varieties in Hanzhong, Shanxi Province was investigated with the technique of SSR. By using 14 effective primers, which were screened from 30 SSR primers distributed on all the 12 rice chromosomes. The results showed that: 69 alleles were detected by 14 pairs of SSR primers. The average number of alleles per SSR locus was 5. The average number of polymorphism information content per SSR primer was 0.48 with a range from 0.27 to 0.74. Genetic similarities ranged from 0.55 to 0.94. The genetic similarity was high and the genetic relationship was closed. The author thinks that the clustering analysis based on SSR marker and trend of pedigree method are fit. and it is one of the reasons that the yield and quality on rice is not easy to break because of near genetic basis of germplasm in Hanzhong.