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Complex genetic variation in nearly complete human genomes.

Glennis A Logsdon1,2, Peter Ebert3,4, Peter A Audano5

  • 1Perelman School of Medicine, University of Pennsylvania, Department of Genetics, Epigenetics Institute, Philadelphia, PA, USA.

Biorxiv : the Preprint Server for Biology
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Summary
This summary is machine-generated.

This study sequences 65 diverse human genomes, creating 130 complete assemblies. This advances understanding of human genetic variation and structural variants for disease association studies.

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Area of Science:

  • Genomics
  • Human Genetics
  • Structural Variation

Background:

  • Complete human genomes are crucial for pangenome reference construction.
  • Understanding complex structural variation requires diverse genomic data.

Purpose of the Study:

  • To sequence diverse human genomes and generate haplotype-resolved assemblies.
  • To resolve complex structural variants and centromere sequences.
  • To improve genotyping accuracy and enable whole-genome inference.

Main Methods:

  • Sequencing of 65 diverse human genomes.
  • Construction of 130 haplotype-resolved assemblies.
  • Validation of human centromeres and characterization of structural variants.

Main Results:

  • Achieved telomere-to-telomere (T2T) status for 39% of chromosomes, closing 92% of previous assembly gaps.
  • Fully resolved 1,852 complex structural variants (SVs) and 1,246 human centromeres.
  • Enhanced genotyping accuracy and whole-genome inference (median QV 45), detecting 26,115 SVs per sample.

Conclusions:

  • The generated pangenome reference significantly improves variant detection and genotyping.
  • This resource facilitates downstream disease association studies by increasing the number of detectable SVs.
  • Complete genome assemblies provide unprecedented resolution of complex genomic regions and variations.