Influence analysis in quantitative trait loci detection

Xiaoling Dou*, Satoshi Kuriki, Akiteru Maeno, Toyoyuki Takada, Toshihiko Shiroishi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


This paper presents systematic methods for the detection of influential individuals that affect the log odds (LOD) score curve. We derive general formulas of influence functions for profile likelihoods and introduce them into two standard quantitative trait locus detection methods-the interval mapping method and single marker analysis. Besides influence analysis on specific LOD scores, we also develop influence analysis methods on the shape of the LOD score curves. A simulation-based method is proposed to assess the significance of the influence of the individuals. These methods are shown useful in the influence analysis of a real dataset of an experimental population from an F2 mouse cross. By receiver operating characteristic analysis, we confirm that the proposed methods show better performance than existing diagnostics.

Original languageEnglish
Pages (from-to)697-719
Number of pages23
JournalBiometrical Journal
Issue number4
Publication statusPublished - 2014 Jun
Externally publishedYes


  • Influence score vector
  • Profile likelihood
  • ROC analysis
  • Shape of LOD score curve
  • Standardized empirical influence function

ASJC Scopus subject areas

  • Statistics and Probability
  • Statistics, Probability and Uncertainty


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