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Fast genetic mapping of complex traits in C. elegans using millions of individuals in bulk

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  • Alejandro Burga

    (University of California, Los Angeles
    Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA))

  • Eyal Ben-David

    (University of California, Los Angeles)

  • Tzitziki Lemus Vergara

    (University of California, Los Angeles)

  • James Boocock

    (University of California, Los Angeles)

  • Leonid Kruglyak

    (University of California, Los Angeles)

Abstract

Genetic studies of complex traits in animals have been hindered by the need to generate, maintain, and phenotype large panels of recombinant lines. We developed a new method, C. elegans eXtreme Quantitative Trait Locus (ceX-QTL) mapping, that overcomes this obstacle via bulk selection on millions of unique recombinant individuals. We use ceX-QTL to map a drug resistance locus with high resolution. We also map differences in gene expression in live worms and discovered that mutations in the co-chaperone sti-1 upregulate the transcription of HSP-90. Lastly, we use ceX-QTL to map loci that influence fitness genome-wide confirming previously reported causal variants and uncovering new fitness loci. ceX-QTL is fast, powerful and cost-effective, and will accelerate the study of complex traits in animals.

Suggested Citation

  • Alejandro Burga & Eyal Ben-David & Tzitziki Lemus Vergara & James Boocock & Leonid Kruglyak, 2019. "Fast genetic mapping of complex traits in C. elegans using millions of individuals in bulk," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-10636-9
    DOI: 10.1038/s41467-019-10636-9
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