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Dissecting complex traits using the Drosophila Synthetic Population Resource.

Anthony D Long1, Stuart J Macdonald2, Elizabeth G King3

  • 1Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA.

Trends in Genetics : TIG
|September 2, 2014
PubMed
Summary

Advanced genetic mapping panels, like the Drosophila Synthetic Population Resource (DSPR), reveal that many complex traits are influenced by multiple gene variants (multiallelism). This finding highlights the need for new analytical methods in genetic studies.

Keywords:
Drosophila melanogastercomplex traitsmissing heritabilitymulti-parental populationmultiallelism

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Area of Science:

  • Genetics
  • Genomics
  • Evolutionary Biology

Background:

  • Understanding the genetic basis of complex traits is challenging due to the limited knowledge of variant positions, effects, and frequencies.
  • Multi-parent advanced intercross mapping panels have been developed in model organisms to enhance the characterization of causative genetic variants.

Purpose of the Study:

  • To investigate the genetic architecture of complex traits using the Drosophila Synthetic Population Resource (DSPR).
  • To assess the utility of multi-parental mapping panels for dissecting phenotypic variation, particularly that arising from rare alleles and loci with multiple functional alleles.

Main Methods:

  • Utilized the Drosophila Synthetic Population Resource (DSPR), a multi-parent advanced intercross mapping panel.
  • Analyzed genetic data to identify loci contributing to complex traits and their allelic composition.

Main Results:

  • Studies using the DSPR indicate that many loci of large effect on complex traits are multiallelic.
  • The panel is effective in dissecting phenotypic variation, especially when rare alleles or multiple functional alleles segregate.

Conclusions:

  • Multiallelism appears to be a common feature in the genetic basis of complex traits.
  • Analytical approaches for identifying multiallelic variants should be prioritized for both genome-wide association studies (GWASs) and multi-parental panel analyses.