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PSEUDOMARKER 2.0: efficient computation of likelihoods using NOMAD.

Edward Michael Gertz1, Tero Hiekkalinna, Sébastien Le Digabel

  • 1National Center for Biotechnology Information, NIH, DHHS, Bethesda, MD, USA. gertz@ncbi.nlm.nih.gov.

BMC Bioinformatics
|February 19, 2014
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Summary
This summary is machine-generated.

PSEUDOMARKER version 2.0 enhances joint linkage and linkage disequilibrium analysis by integrating diverse genetic data. This improved software is faster and more robust, utilizing advanced optimization for genetic marker analysis.

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Area of Science:

  • Genetics
  • Bioinformatics
  • Statistical Genetics

Background:

  • PSEUDOMARKER is a software package for joint linkage and linkage disequilibrium analysis.
  • It uniquely integrates case-control and pedigree data of varying structures.
  • The analysis maximizes the full likelihood over marker and conditional allele frequencies and recombination fraction.

Purpose of the Study:

  • To enhance the performance and robustness of the PSEUDOMARKER software.
  • To implement modern optimization methods for likelihood maximization.
  • To improve the efficiency of genetic linkage and disequilibrium analyses.

Main Methods:

  • PSEUDOMARKER version 2.0 was substantially modified to incorporate modern optimization techniques.
  • The software package NOMAD was employed for likelihood maximization.
  • Joint linkage and linkage disequilibrium analyses were performed.

Main Results:

  • Version 2.0 utilizes NOMAD for likelihood maximization, achieving comparable or superior optima.
  • Significantly fewer likelihood function evaluations are required compared to previous versions.
  • PSEUDOMARKER 2.0 demonstrates increased robustness and speed.

Conclusions:

  • PSEUDOMARKER version 2.0 is substantially faster and more robust than version 1.0.
  • Modern optimization methods have significantly improved the software's performance.
  • The NOMAD optimization package shows potential utility in other bioinformatics applications involving complex likelihood functions.