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Related Concept Videos

Phylogeny01:23

Phylogeny

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...
Phylogenetic Trees03:21

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.The length of the branches can depict time or the relative amount of change among organisms. For instance, the branch length might indicate the number of amino acid changes in the sequence that underlies the...
Phylogenetic Trees03:21

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.The length of the branches can depict time or the relative amount of change among organisms. For instance, the branch length might indicate the number of amino acid changes in the sequence that underlies the...
Evolutionary Relationships through Genome Comparisons02:54

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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 Phylogeny01:28

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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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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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A Practical Guide to Phylogenetics for Nonexperts
12:00

A Practical Guide to Phylogenetics for Nonexperts

Published on: February 5, 2014

DendroPy: a Python library for phylogenetic computing.

Jeet Sukumaran1, Mark T Holder

  • 1Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, USA. jeet@ku.edu

Bioinformatics (Oxford, England)
|April 28, 2010
PubMed
Summary
This summary is machine-generated.

DendroPy is a Python library for phylogenetic data analysis, offering efficient tree manipulation and simulation. It supports various data formats, aiding phyloinformatics and phylogeography research.

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Area of Science:

  • Phylogenetics
  • Bioinformatics
  • Computational Biology

Background:

  • DendroPy is a cross-platform library for the Python programming language.
  • It focuses on object-oriented reading, writing, simulation, and manipulation of phylogenetic data, with an emphasis on phylogenetic tree operations.

Purpose of the Study:

  • To provide a versatile tool for phylogenetic data analysis.
  • To facilitate rapid calculations of tree distances, similarities, and shape.
  • To support the generation of trees under various phylogenetic and coalescent models.

Main Methods:

  • Utilizes a splits-hash mapping for efficient tree distance calculations.
  • Incorporates rich simulation routines for generating phylogenetic trees.
  • Supports a broad range of phylogenetic data formats including NEXUS, Newick, PHYLIP, FASTA, and NeXML.

Main Results:

  • Enables rapid and accurate phylogenetic tree manipulation and analysis.
  • Facilitates the simulation of diverse phylogenetic and coalescent models.
  • Provides compatibility with multiple standard phylogenetic data formats.

Conclusions:

  • DendroPy serves as a valuable tool in phyloinformatics and phylogeographic pipelines.
  • Its comprehensive features support a wide array of phylogenetic research needs.
  • The library is readily available for download and development.