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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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Related Experiment Video

Updated: Dec 30, 2025

Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies

Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies

Published on: August 20, 2021

Building near-complete plant genomes.

Todd P Michael¹, Robert VanBuren²

¹Informatics Department, J. Craig Venter Institute, La Jolla, CA, USA.

Current Opinion in Plant Biology

|January 26, 2020

Summary

Advanced sequencing technologies enable high-quality plant genome assemblies. New tools are emerging to tackle complex polyploid and heterozygous genomes, focusing on haplotype phasing and pan-genomics.

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Last Updated: Dec 30, 2025

Hybrid De Novo Genome Assembly for the Generation of Complete Genomes of Urinary Bacteria using Short- and Long-read Sequencing Technologies

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Generating Transgenic Plants with Single-copy Insertions Using BIBAC-GW Binary Vector

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Area of Science:

Genomics
Bioinformatics
Plant Science

Background:

Plant genomes exhibit significant variation in size, ploidy, and heterozygosity.
Transposable elements contribute to the complexity of plant genome assembly.
Short-read sequencing technologies have limitations in assembling complex genomic regions.

Purpose of the Study:

To highlight recent advances in plant genome assembly.
To discuss the challenges posed by complex plant genomes.
To identify emerging frontiers in plant genomics research.

Main Methods:

Utilizing single molecule sequencing for long reads (exceeding megabases).
Employing physical mapping technologies for chromosome-scale assemblies.
Developing new computational tools and approaches for complex genomes.

Main Results:

High-quality, chromosome-scale assemblies are now achievable for complex plant genomes.
Long single-molecule reads aid in resolving previously inaccessible genomic regions.
Progress is being made in assembling polyploid and heterozygous plant genomes.

Conclusions:

Single molecule sequencing and physical mapping are revolutionizing plant genome assembly.
Addressing challenges in polyploid and heterozygous genomes requires innovative tools.
Haplotype phasing, structural variant analysis, and de novo pan-genomics are key future directions.