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In Situ Labeling of Mitochondrial DNA Replication in Drosophila Adult Ovaries by EdU Staining
10:31

In Situ Labeling of Mitochondrial DNA Replication in Drosophila Adult Ovaries by EdU Staining

Published on: October 15, 2016

Paternal leakage of mitochondrial DNA is genetically controlled in Drosophila

Maria-Eleni Parakatselaki1, Stavroula Zapri1, Sevasti Koursioti1

  • 1Department of Biology, University of Crete, Heraklion 70013, Greece.

G3 (Bethesda, Md.)
|July 28, 2026
PubMed

Insights

Paternal mitochondrial DNA (mtDNA) leakage is not a random error but is genetically controlled. This genetic basis for paternal mtDNA transmission in Drosophila suggests implications for mitochondrial genome evolution and stability.

Area of Science:

  • Genetics
  • Evolutionary Biology
  • Molecular Biology

Background:

  • Mitochondrial DNA (mtDNA) is typically maternally inherited.
  • Paternal mtDNA leakage is considered a rare stochastic event.

Purpose of the Study:

  • To investigate the genetic basis of paternal mtDNA leakage.
  • To determine if paternal leakage has a genetic component in Drosophila.

Main Methods:

  • Created hybrids between Drosophila simulans isofemale lines and D. mauritiana.
  • Assayed for heteroplasmy to quantify paternal leakage.
  • Analyzed leakage variation across lines, families, and sexes.

Main Results:

  • Paternal mtDNA leakage varied significantly and consistently among Drosophila lines and families.
  • Leakage was substantially higher in males than in females.
  • High heritability estimates indicated strong genetic control over leakage.

Conclusions:

  • Paternal mtDNA leakage is under strong genetic control, not random error.
  • This genetic control has potential implications for mitochondrial genome stability and evolution.
  • Findings challenge the assumption of strict maternal inheritance due to stochastic errors.
Keywords:
Drosophilagenome transmissionheritabilityheteroplasmymitochondrial DNAmitochondrial inheritancepaternal leakage

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