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Yemane Girma,Dadakhalandar Doddamani,Rajkumar,Sadik Ahmed Wasik Ahmed,Sheweta Gujar,Suvarna Patil,Gurusiddesh Hiremath,Bashasab Fakrudin 한국작물학회 2014 Journal of crop science and biotechnology Vol.17 No.3
Single Nucleotide Polymorphisms (SNPs) are the commonest type of nucleotide variation distributed throughout thegenome and have enormous potential to saturate genetic maps. However, their identification is constrained by the huge investmentrequired for their detection. In this study, we used publicly available EST (Expressed Sequence Tag) sequences to identifySNPs in Sorghum bicolor. A total of 12,421 putative SNPs were identified from 2,921 contiguous transcripts leading to anaverage SNP interval of one putative SNP for every 275.26 bp. The proportion of transition type mutations (0.598) was largerthan transversion types conforming to biological expectations. In order to demonstrate the utility of the SNPs for developmentof markers with relatively cheap assays, we experimentally validated SNPs using Single Strand Conformation Polymorphism(SSCP) technique in sorghum accessions, which are used as parents for development mapping populations. Genotyping theseparents of mapping populations with SSCP markers showed up to 33% polymorphism in the markers suggesting that the SNPscan be used as potential resource for S. bicolor crop improvement programs