Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (9): 82-93.doi: 10.11924/j.issn.1000-6850.casb18120040

Special Issue: 水稻

• Research article • Previous Articles     Next Articles

A Method for Detecting SNP Markers Based on PCR in Rice

Yu Wang(), Xue Xu, Ruiying Qin, Xuzhong Lu, Li Li, Jianbo Yang, Jinlong Ni, Hui Ma, Xiufeng Wang   

  1. Rice Research Institute, Anhui Academy of Agricultural Sciences, Hefei 230031
  • Received:2018-12-11 Revised:2019-01-03 Online:2020-03-25 Published:2020-03-29

Abstract:

This study aims to find a simple SNPs detection method for rice species identification and genetic diversity analysis. 245 main hybrid rice varieties and their parents widely cultivated in the middle-lower reaches of the Yangtze River were used as materials. 124 pairs of highly polymorphic loci were screened out from 1319 SNP loci and an efficient SNP detection system was constructed. One of the selected SNP markers, sf0141821553, and a SSR maker RM7120 were used to identify the purity of hybrid seed. The genotypes of Wx in parental species and hybrid generation groups were amplified by Caps-AccI and SNP-sf0601764762, respectively, and they had the same result. The genetic diversity analysis was conducted with the 124 pairs of loci among the 245 rice varieties. The clustering analysis revealed that the genetic similarity coefficients within the 245 varieties were from 0.64 to 0.97. The 245 varieties were classified into two cluster groups with the similarity coefficient of 0.64. Each of the two cluster groups was further divided into two subgroups with the similarity coefficient of 0.712 and 0.667 respectively. These results showed obvious population structure among these rice varieties, and the genotypes of the tested varieties and the genetic differences among varieties were accurately distinguished. The detection of SNP markers by polyacrylamide gel electrophoresis is simple, and does not require large instruments and expensive reagents, which is convenient for laboratory identification of rice varieties.

Key words: rice, SNP, functional genes, marker screening, polymorphism

CLC Number: