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Volume Measures for Linkage Disequilibrium

  • Author(s): Yuguo Chen;
  • Chia-Ho Lin;
  • Chiara Sabatti
  • et al.

We discuss the value of volume measures for linkage disequilibrium, showing how they are robust to small sample variation and easily generalized to multi-allelic markers. In particular we introduce Dvol, a volume analogue to D' and show that it performs substantially better when the sample size is small to moderate. Mvol is proposed as a generalization of this measure to multi-allelic markers. Finally a measure based on homozygosity Hvol is suggested as a generalization of R^2. To evaluate these measures, we introduce a sequential importance sampling algorithm. We illustrate their performance on simulated and real data.

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