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 Online Journal of Bioinformatics © 


 Volume 10 (2): 224-232, 2009

Single nucleotide polymorphisms (SNPs) and indels in expressed sequence tag libraries of turmeric (Curcuma longa L.).


Chandrasekar A1, Riju A1, Sithara K2, Anoop S 3, Santhosh J Eapen*1


1Bioinformatics Centre, Indian Institute of Spices Research, Marikunnu P.O, Calicut – 673012, Kerala, India, 2 Kandiyl House, Makkada (P.O), Kakkodi, Calicut – 673617. Kerala. India. 3Ottankulam, Athicode (P.O), Palakkad (Dist), Kerala – 678554. India. *Corresponding author:




Chandrasekar A, Riju A, Sithara K, Anoop S , Santhosh J Eapen Single nucleotide polymorphisms (SNPs) and indels in expressed sequence tag libraries of turmeric (Curcuma longa L.), Onl J Bioinform., Volume 10 (2): 224-232, 2009Expressed sequence tag (EST) sequencing programs provide methods to identify novel genes. EST’s are a source of biologically useful SNPs due to the relatively high redundancy of gene sequences and diversity of genotypes represented within databases. EST based SNPs are potential molecular markers for genetic improvement. 27599 and 2506 polymorphic sites (SNPs and indels) were found in turmeric, a medicinal spice plant. Frequencies of SNPs and indels were 1/91 bp and 1/998 bp, respectively. The transition to transversion ratio was 0.713, which showed  a relative increase in transversion type mutation. The program is available (


Keywords: Curcuma longa, expressed sequence tag, mutation, nucleotide, transition, transversion, turmeric