TILLING and EcoTILLING for Discovery of Induced and Natural Variations in Sorghum Genome

  • Ramadoss Bharathi Raja
  • Somanath Agasimani
  • Varadharaju Anusheela
  • Venkatesan Thiruvengadam
  • Ravindra N. Chibbar
  • Sundaram Ganesh RamEmail author
Part of the Compendium of Plant Genomes book series (CPG)


TILLING is a reverse-genetic method to uncover the induced variation from the mutagenized population. Initially induced variation was detected by melting and reannealing the PCR products, cleavage of heteroduplex using CEL I endonucleases, and the resulting products separated and visualized on sequencing gels or capillaries. Subsequent sequence analysis in heteroduplex regions of individual plant DNA identified the mutation. In the past 6 years, mutation discovery through sequencing is becoming popular. Sequencing-based TILLING is less labor intensive with high specificity and confidence of mutation discovery. TILLING by sequencing has been reported in many crop plants including rice and wheat and is yet to be applied in sorghum. A conventional TILLING project has been reported in sorghum for agronomically important traits and also for the development of acyanogenic or low cyanogenic mutants in sorghum. EcoTILLING is another reverse-genetic approach that utilizes the same principles in the natural population instead of the mutagenized population. In this chapter, we discuss TILLING and EcoTILLING in sorghum and also TILLING by sequencing for the improvement of sorghum through the reverse-genetic approach.


TILLING by sequencing EcoTILLING Sorghum Natural variation Reverse genetics Mutation Functional genomics 


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Copyright information

© Springer International Publishing AG 2016

Authors and Affiliations

  • Ramadoss Bharathi Raja
    • 1
    • 3
  • Somanath Agasimani
    • 2
  • Varadharaju Anusheela
    • 3
  • Venkatesan Thiruvengadam
    • 3
  • Ravindra N. Chibbar
    • 1
  • Sundaram Ganesh Ram
    • 3
    Email author
  1. 1.Department of Plant SciencesCollege of Agriculture and Bioresources, University of SaskatchewanSaskatoonCanada
  2. 2.University of Agricultural SciencesBangaloreIndia
  3. 3.Department of Plant Genetic ResourcesCentre for Plant Breeding and Genetics, Tamil Nadu Agricultural UniversityCoimbatoreIndia

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