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Genome Annotation and Assembly

Genome Annotation and Assembly

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.

RNA-seq

RNA-seq

RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...

Genome-wide Association Studies-GWAS

Genome-wide Association Studies-GWAS

Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...

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Related Experiment Video

Updated: Jan 12, 2026

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

RAGA: a reference-assisted genome assembly tool for efficient population-scale assembly.

Ru-Peng Zhao¹, Yu-Hong Luo¹, Wen-Zhao Xie²

¹State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Science and Technology, Guangxi University, Nanning 530004, China.

Horticulture Research

|November 3, 2025

Summary

This summary is machine-generated.

Reference-Assisted Genome Assembly (RAGA) is a new tool that makes large-scale genome assembly faster and cheaper. It uses existing genomes and new sequencing data to create high-quality results for population genomics.

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Last Updated: Jan 12, 2026

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Area of Science:

Genomics
Bioinformatics
Computational Biology

Background:

High-quality reference genomes are crucial for population-scale pan-genomic research.
Current methods for population-scale genome assembly are expensive and time-consuming.

Purpose of the Study:

To develop an efficient computational tool for population-scale genome assembly.
To improve the quality and accessibility of large-scale genomic studies.

Main Methods:

Developed Reference-Assisted Genome Assembly (RAGA), a hybrid approach combining de novo and reference-based assembly.
Utilized existing reference genomes and PacBio HiFi reads for high-quality alternative long sequence generation.
Integrated RAGA-generated sequences with de novo assemblies to enhance overall assembly quality.

Main Results:

RAGA demonstrated significant improvements in plant genome assemblies.
Reduced contig count and gaps, while correcting assembly errors.
Streamlined population-scale genome assembly workflows, enhancing efficiency.

Conclusions:

RAGA offers a substantial advancement in population-scale genome assembly.
The tool makes large-scale genomic studies more accessible and efficient.
Facilitates robust foundations for comprehensive pan-genomic investigations.