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Surveying Low-Cost Methods to Measure Lifespan and Healthspan in Caenorhabditis elegans
Published on: May 18, 2022
TILLING is an effective reverse genetics technique for Caenorhabditis elegans
Erin J Gilchrist1, Nigel J O'Neil, Ann M Rose
1Department of Botany, 6270 University Blvd, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada. ering@interchange.ubc.ca
BMC Genomics
|October 20, 2006
Summary
Targeting Induced Local Lesions in Genomes (TILLING) is an effective reverse genetics tool for C. elegans. This method efficiently identifies heritable mutations, providing new alleles for studying gene function in vivo.
Area of Science:
- Genetics
- Molecular Biology
- Developmental Biology
Background:
- Targeting Induced Local Lesions in Genomes (TILLING) is a reverse genetics technique.
- It utilizes mismatch-specific enzymes for heteroduplex analysis to detect mutations.
- Previous reverse genetics methods in C. elegans had limitations in identifying heritable mutations.
Purpose of the Study:
- To evaluate TILLING as an effective reverse genetic strategy for the model organism C. elegans.
- To generate and screen for mutations in 10 target genes using TILLING.
- To assess the efficiency and types of mutations identified by TILLING in C. elegans.
Main Methods:
- Generated an EMS-mutagenized C. elegans population of approximately 1500 individuals.
- Screened for mutations in 10 specific genes using the TILLING technique.
- Analyzed mutation types, including silent, missense, and putative null alleles.
Main Results:
- Identified a total of 71 mutations across the 10 screened genes, providing multiple alleles per gene.
- The majority of mutations (59%) were missense alleles, and 3% were putative null alleles.
- Achieved a mutation rate of 1/293 kb, comparable to other organisms, with 96% G/C-to-A/T transitions.
Conclusions:
- TILLING is an effective and cost-efficient reverse genetics tool for C. elegans.
- It complements existing techniques and provides an allelic series for any locus without bias.
- TILLING has generated the first heritable mutations for eight of the 10 genes studied, enabling in vivo functional analysis.
