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Phylogeny inferred from codon usage pattern in 31 organisms

C Nesti1, G Poli, M Chicca

  • 1Department of Evolutionary Biology, University of Ferrara, Italy.

Computer Applications in the Biosciences : CABIOS
|April 1, 1995
PubMed
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Codon usage patterns correlate with evolutionary history in diverse organisms. This study analyzed 31 species, revealing links between genetic code and phylogenetic relationships, particularly for recently diverged lineages.

Area of Science:

  • Genomics and Evolutionary Biology
  • Bioinformatics and Computational Biology

Background:

  • Codon usage bias, the non-random usage of synonymous codons, is a fundamental aspect of molecular evolution.
  • Understanding codon usage patterns can provide insights into evolutionary processes and organismal relationships.

Purpose of the Study:

  • To investigate the relationship between codon usage patterns and phylogenetic relationships across a broad range of biological taxa.
  • To determine if codon usage similarity reflects evolutionary divergence times.

Main Methods:

  • Utilized the Codonusage database to analyze codon usage in 31 organisms representing major biological groups.
  • Employed Pearson linear correlation coefficient to quantify codon usage similarity between all pairwise organism combinations.
  • Constructed an evolutionary dendrogram based on a calculated correlation distance matrix to visualize phylogenetic relationships.

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Main Results:

  • A fair correlation was observed between codon usage patterns and established phylogenetic relationships among the studied organisms.
  • This correlation was more pronounced in organisms that diverged more recently, specifically from the late Jurassic to the early Cretaceous periods.

Conclusions:

  • Codon usage patterns serve as a valid molecular marker for inferring evolutionary relationships, especially among closely related species.
  • The study supports the hypothesis that codon usage evolves in conjunction with phylogenetic divergence.