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Related Concept Videos

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

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 Phylogeny01:28

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,...
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...
Survival Tree01:19

Survival Tree

Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
 Building a Survival Tree
Constructing a survival tree begins...

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Updated: Jun 5, 2026

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
08:57

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin

Published on: August 14, 2018

Progress with methods for constructing evolutionary trees.

D Penny1, M D Hendy, M A Steel

  • 1David Penny is in the Molecular Genetics Unit, Massey University, Palmerston North, New Zealand.

Trends in Ecology & Evolution
|January 18, 2011
PubMed
Summary
This summary is machine-generated.

Evolutionary tree reconstruction methods face conflicting goals of speed and accuracy. Recent advances in phylogenetic invariant methods offer improved sequence information utilization and model parameter estimation for more reliable evolutionary trees.

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

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Last Updated: Jun 5, 2026

Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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Area of Science:

  • Evolutionary Biology
  • Computational Biology
  • Phylogenetics

Background:

  • Reconstructing evolutionary trees (phylogenies) is crucial for understanding life's history.
  • Current tree-reconstruction methods often present a trade-off between computational efficiency and accuracy/consistency.
  • Existing fast methods may be unreliable, even with extensive sequence data.

Purpose of the Study:

  • To explore advancements in tree-reconstruction methodologies.
  • To address the conflicting criteria of efficiency, power, consistency, robustness, and falsifiability in phylogenetic inference.
  • To investigate new approaches for estimating the reliability of inferred evolutionary trees.

Main Methods:

  • Review of progress in tree inference approaches.
  • Analysis of general properties of phylogenetic methods.
  • Development of techniques for assessing tree reliability.
  • Application of phylogenetic invariant methods for direct parameter estimation from sequence data.

Main Results:

  • Exciting progress has been made in developing new tree inference strategies.
  • Phylogenetic invariant methods enable direct estimation of model parameters from sequence data.
  • Understanding of general method properties and reliability estimation has advanced.

Conclusions:

  • New phylogenetic invariant methods represent a significant step towards efficient and reliable evolutionary tree reconstruction.
  • Further theoretical development and practical guidance are needed to fully leverage current advancements in phylogenetics.