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Why parametric linkage analysis on Merlin gives zero "0" LOD score?

Hi all,

I am using Merlin for linkage analysis of large families. The SNP genotype file contains about 150K SNPs. I used Alohomora tool to get merlin input files. I can see negative, positive and zero LOD scores with I am trying single-point parametric linkage analysis with different models. But when I go for multi-point parametric linkage analysis with the same data, merlin gives the out put with zero LOD score on all markers of all chromosomes. I have tried many things but I am unable to trouble shoot it. An urgent help will be appreciated.

Thanks

snp alohomora merlin

1 answer

Hello! Although it's a very old problem, I have encountered the same issue and it was difficult to find relevant answers through search. Finally, I checked my PED file and found that there was an issue with the family relationships. Please double-check your phenotype and kinship relationships.

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