Detection of SNP : TILLING and
EcoTilling
Presented by :
Debadatta Panda
All SNP are product of
mutation but all mutations
are not SNPs
Why TILLING is preferred over others
Reverse Genetics approaches
TILLING PROCESS
Chemicals of importance
In Maize pollen is used
Heteroduplex formation
Advantage of Li Cor Gel system
TILLING CENTERS ACROSS THE WORLD
Year wise TILLING approach in various crops
Examples of TILLING projects
Brassica TILLING project
TILLING and EcoTILLING technique have been adapted in
diverse species including rice, maize, Lotus, poplar,
Arabidopsis, wheat, barley, potato, tomato, sunflower,
common bean, Field Mustard, clover, melon, pea, peanut,
sorghum, rapeseed, soybean, melon, poplar, sugarcane,
brassica and other for the purpose of gene detection,
functional genomics, polymorphism assessment, plant
breeding as described in case study part.
Current Status of TILLING and
EcoTILLING
EcoTILLING
• EcoTILLING is similar to TILLING, except that its
objective is to identify natural genetic variation
as opposed to induced mutations.
• Many species are not amenable to chemical
mutagenesis; therefore, EcoTILLING can aid in the
discovery of natural variants and their putative
gene function
• This approach allows one to rapidly screen
through many samples with a gene of interest to
identify naturally occurring SNPs and / or small
INs/DELS
Application of EcoTILLING
iTILLING
• A new approach to the TILLING method that
reduces costs and the time necessary to carry
out mutation screening was developed for
Arabidopsis and it is called iTILLING,
individualized TILLING
Merits of TILLING
Merits contd…
Demerits of TILLING

Tilling and ecotilling