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Refined genetic maps reveal sexual dimorphism in human meiotic recombination at multiple scales

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  • Claude Bhérer

    (Albert Einstein College of Medicine
    Present address: New York Genome Center, 101 Avenue of the Americas, New York, New York 10013, USA)

  • Christopher L. Campbell

    (Albert Einstein College of Medicine)

  • Adam Auton

    (Albert Einstein College of Medicine)

Abstract

In humans, males have lower recombination rates than females over the majority of the genome, but the opposite is usually true near the telomeres. These broad-scale differences have been known for decades, yet little is known about differences at the fine scale. By combining data sets, we have collected recombination events from over 100,000 meioses and have constructed sex-specific genetic maps at a previously unachievable resolution. Here we show that, although a substantial fraction of the genome shows some degree of sexually dimorphic recombination, the vast majority of hotspots are shared between the sexes, with only a small number of putative sex-specific hotspots. Wavelet analysis indicates that most of the differences can be attributed to the fine scale, and that variation in rate between the sexes can mostly be explained by differences in hotspot magnitude, rather than location. Nonetheless, known recombination-associated genomic features, such as THE1B repeat elements, show systematic differences between the sexes.

Suggested Citation

  • Claude Bhérer & Christopher L. Campbell & Adam Auton, 2017. "Refined genetic maps reveal sexual dimorphism in human meiotic recombination at multiple scales," Nature Communications, Nature, vol. 8(1), pages 1-9, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms14994
    DOI: 10.1038/ncomms14994
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