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Evolutionary Relationships through Genome Comparisons

Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...

Microbial Phylogeny

Microbial Phylogeny

Understanding the evolutionary relationships among microorganisms is fundamental to microbial ecology and taxonomy. Phylogenetic trees are essential tools for inferring these relationships, relying primarily on comparative analyses of molecular sequences such as DNA, RNA, or proteins. In microbial studies, these trees typically depict the evolutionary paths of diverse bacterial and archaeal species by mapping genetic differences accumulated over time.Phylogenetic trees are composed of tips,...

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Phylogenetic Trees

Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.

Phylogenetic Trees

Phylogenetic Trees

Phylogenetic trees come in many forms. It matters in which sequence the organisms are arranged from the bottom to the top of the tree, but the branches can rotate at their nodes without altering the information. The lines connecting individual nodes can be straight, angled, or even curved.

Phylogeny

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Phylogeny is concerned with the evolutionary diversification of organisms or groups of organisms. A group of organisms with a name is called a taxon (singular). Taxa (plural) can span different levels of the evolutionary hierarchy. For instance, the group containing all birds is a taxon (comprising the class Aves), and the group of all species of daisies (the genus Bellis) is a taxon. Phylogenies can likewise include just one genus (i.e., depict species relationships) or span an entire kingdom.

Applications of Molecular Taxonomy

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Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...

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Related Experiment Video

Updated: May 10, 2026

The ITS2 Database

The ITS2 Database

Published on: March 12, 2012

Phylogenetic analysis with the iPlant discovery environment.

Naim Matasci^1,2, Sheldon McKay^1,3

¹The iPlant Collaborative.

Current Protocols in Bioinformatics

|June 11, 2013

Summary

This study details bioinformatics protocols for phylogenetic analysis using the iPlant Collaborative

Area of Science:

Bioinformatics
Computational Biology
Evolutionary Biology

Background:

The iPlant Collaborative's Discovery Environment offers a unified web portal for bioinformatics applications.
Phylogenetic analysis is crucial for understanding evolutionary relationships.

Purpose of the Study:

To describe example protocols for phylogenetic analyses.
To demonstrate workflows from sequence retrieval to tree visualization.
To present methods for sub-tree extraction and ancestral character state reconstruction.

Main Methods:

Sequence retrieval from GenBank.
Multiple sequence alignment inference.
Phylogenetic tree visualization.
Sub-tree extraction from large phylogenies.

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The ITS2 Database

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Published on: August 14, 2018

A Concoction Pipeline for Generating Molecular Operational Taxonomic Units (MOTUs) Among Riparian and Aquatic Beetles

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Ancestral character state reconstruction using comparative methods.

Main Results:

Provided example protocols for comprehensive phylogenetic analyses.
Demonstrated the utility of the Discovery Environment for bioinformatics workflows.
Presented methods for advanced phylogenetic analyses including sub-tree extraction and ancestral state reconstruction.

Conclusions:

The iPlant Discovery Environment facilitates diverse phylogenetic analyses.
The described protocols offer a practical guide for researchers.
Advanced methods enhance the scope of phylogenetic investigations.