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Genomic Imprinting and Inheritance

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Sample Preparation to Bioinformatics Analysis of DNA Methylation: Association Strategy for Obesity and Related Trait Studies
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A framework for detecting and characterizing genetic background-dependent imprinting effects.

Jason B Wolf1, James M Cheverud

  • 1Faculty of Life Sciences, University of Manchester, Manchester M139PT, UK. jason@evolutionarygenetics.org

Mammalian Genome : Official Journal of the International Mammalian Genome Society
|August 7, 2009
PubMed
Summary
This summary is machine-generated.

Genomic imprinting effects can change based on genetic background. This study introduces a new model to detect these background-dependent imprinting effects, crucial for understanding imprinting evolution.

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Area of Science:

  • Genetics
  • Evolutionary Biology
  • Genomics

Background:

  • Genomic imprinting influences complex traits by parent-of-origin allele effects.
  • Previous studies on genetic architecture have not explored background-dependent imprinting.
  • Understanding background dependence is key to the evolution of genomic imprinting.

Purpose of the Study:

  • To develop a model for detecting genetic background-dependent imprinting effects.
  • To investigate epistatic interactions involving imprinting.
  • To scan the mouse genome for loci modulating imprinting effects of quantitative trait loci (QTL).

Main Methods:

  • Developed a two-locus epistasis model incorporating imprinting effects.
  • Applied the model to a mouse genome scan.
  • Identified locus pairs exhibiting complex epistatic patterns.

Main Results:

  • The model revealed nine orthogonal forms of epistasis, including novel types.
  • Identified two locus pairs with background-dependent imprinting effects.
  • Observed reciprocal changes in imprinting status based on genetic background.

Conclusions:

  • The developed model provides a framework for detecting background-dependent imprinting.
  • Findings offer insights into the evolution and background dependence of genomic imprinting.
  • The study successfully identified interacting loci with reciprocal imprinting status changes.