Phylogenetic Analysis
Phylogenetic Analysis - Related Videos
12:00
A Practical Guide to Phylogenetics for Nonexperts
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Cited by 11 •
2014
Here we describe a step-by-step pipeline for generating reliable phylogenies from nucleotide or amino acid sequence datasets. This guide aims to serve researchers or students new to phylogenetic...
08:57
Using Phylogenetic Analysis to Investigate Eukaryotic Gene Origin
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Cited by 17 •
2018
A method of constructing a phylogenetic tree based on sequence homology of SWEETs from eukaryotes and SemiSWEETs from prokaryotes is described. Phylogenetic analysis is a useful tool for explaining the evolutionary relatedness between homologous proteins or genes from different organism groups.
03:21
Phylogenetic Trees
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2021
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...
03:21
Phylogenetic Trees
0 Views •
2026
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...
01:22
Phylogenetic Species Concept in Microbiology
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2026
The phylogenetic species concept (PSC) is a framework used to delineate species based on evolutionary relationships, emphasizing shared ancestry and diagnosable genetic traits. Unlike morphological or biological species concepts, the PSC is particularly advantageous for microbial taxonomy, where traditional reproductive or phenotypic criteria often fall short due to the prevalence of asexual reproduction, minimal morphological differentiation, and widespread horizontal gene transfer among...
FAQs
Alignment places homologous DNA or protein positions into comparable regions, allowing researchers to distinguish shared from differing characteristics. Evolutionary models then evaluate how observed changes could have accumulated over time, and alternative tree structures can be compared according to which best explains the available data.
Conserved regions retain similar characteristics across the entities being compared, whereas rapidly evolving regions record more change. Examining both helps researchers interpret which parts of DNA or proteins remain stable and which reflect evolutionary divergence. This distinction supports genomic interpretation and investigation of adaptation and diversification.
A species-focused analysis compares organisms, whereas a gene-focused analysis compares genes or homologous sequence regions. Their results address different biological questions, even though both use shared and differing characteristics and evolutionary models. This flexibility lets phylogenetic analysis support classification, genomic interpretation, or studies of ancestry.
A typical workflow begins with selecting comparable DNA or protein data, aligning homologous regions, and applying an evolutionary model. Researchers then infer a branching tree from the observed similarities and differences. Keeping these stages distinct helps connect the input data with the inferred evolutionary relationships.
Researchers apply phylogenetic analysis to species classification and biodiversity studies, where relationships among organisms help organize biological diversity. The same approach supports pathogen surveillance by helping examine relationships among pathogen entities. In both settings, the analysis provides a comparative framework for interpreting variation and relatedness.
Within biology, phylogenetic analysis helps researchers interpret genomic data and reconstruct ancestral traits. It can also highlight conserved or rapidly evolving regions, linking sequence patterns with questions about how organisms adapt and diversify across generations. These outcomes extend beyond classification by connecting molecular evidence to broader evolutionary investigations.