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Updated: Jun 2, 2026

A Practical Guide to Phylogenetics for Nonexperts
12:00

A Practical Guide to Phylogenetics for Nonexperts

Published on: February 5, 2014

seqphase: a web tool for interconverting phase input/output files and fasta sequence alignments.

J-F Flot1

  • 1UMR UPMC-CNRS-MNHN-IRD 7138, Département Systématique et Évolution, Muséum National d'Histoire Naturelle, Case Postale 26, 57 rue Cuvier, 75231 Paris Cedex 05, France.

Molecular Ecology Resources
|May 14, 2011
PubMed
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Creating input files for haplotype inference (Bayesian inference) from sequence data is difficult. The new seqphase web tool simplifies this process by automating file generation and conversion, saving time and reducing errors in genetic analysis.

Area of Science:

  • Bioinformatics
  • Computational Biology
  • Genetics

Background:

  • Bayesian inference of haplotypes from diploid genotypes is crucial for genetic studies.
  • Manual creation of input files for haplotype phasing is labor-intensive and prone to errors, especially with large datasets.

Purpose of the Study:

  • To present seqphase, a web tool designed to automate the generation of phase input files from FASTA sequence alignments.
  • To facilitate the conversion of phase output files back into FASTA format.
  • To improve the efficiency and accuracy of haplotype phasing analyses.

Main Methods:

  • Development of a Perl-based web tool, seqphase.
  • Automated generation of phase input files from FASTA sequence alignments.
  • Implementation of consistency checks for input datasets.

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Last Updated: Jun 2, 2026

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  • Conversion of phase output files back to FASTA format.

    • Main Results:

    • seqphase successfully generates phase input files from FASTA alignments.
    • The tool performs consistency checks on the data.
    • It suggests appropriate command-line options for phase data analysis.
    • Conversion of phase output files to FASTA is also supported.

    Conclusions:

    • seqphase significantly streamlines the process of preparing data for haplotype phasing.
    • The tool reduces manual effort and potential errors in genetic analyses.
    • seqphase is freely accessible online, promoting wider adoption in genetic research.