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Related Concept Videos

Genome Annotation and Assembly03:36

Genome Annotation and Assembly

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The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
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Updated: Oct 3, 2025

Pre-Implantation Genetic Testing for Aneuploidy on a Semiconductor Based Next-Generation Sequencing Platform
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gcaPDA: a haplotype-resolved diploid assembler.

Min Xie1, Linfeng Yang2,1, Chenglin Jiang2

  • 1Guangdong Engineering Research Center of Plant and Animal Genomics, BGI Genomics, BGI-Shenzhen, Shenzhen, 518083, China.

BMC Bioinformatics
|February 15, 2022
PubMed
Summary
This summary is machine-generated.

Generating accurate haplotype-resolved genome assemblies is crucial for research. The new gcaPDA pipeline uses gamete cells to improve diploid genome assembly for complex, heterozygous organisms like maize and rice.

Keywords:
DiploidGamete cellsHaplotype-resolved de novo assemblerHighly heterozygous genomes

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Area of Science:

  • Genomics
  • Bioinformatics
  • Molecular Biology

Background:

  • Chromosome-scale haplotype-resolved genome assembly is vital for functional genomics.
  • Existing de novo assemblers struggle with complex, heterozygous genomes, either discarding allelic information (haploid) or limited in scope (diploid).

Purpose of the Study:

  • To develop a novel diploid genome assembly pipeline capable of resolving haplotypes in complex genomes.
  • To overcome limitations of current assemblers in handling high heterozygosity and repetitive sequences.

Main Methods:

  • Developed gcaPDA (gamete cells assisted Phased Diploid Assembler), a pipeline leveraging haploid gamete cells for haplotype resolution.
  • Utilized robust programming and simulated HiFi reads from maize, alongside real rice data, for validation.

Main Results:

  • Demonstrated the effectiveness of gcaPDA in generating high-quality, haplotype-resolved diploid assemblies.
  • Successfully assembled highly heterozygous and repetitive genomes, including maize and rice.

Conclusions:

  • gcaPDA offers a versatile solution for complex eukaryotic genome assembly, surpassing limitations of many existing diploid assemblers.
  • The pipeline is expected to have broad applications in functional genomics and evolutionary studies across diverse species.