River valley populations may contain HLA haplotypes reflecting their demographic history. This study has demonstrated that the resistance against recombinations between HLA-A and HFE make HLA haplotypes excellent markers for population movements. Founder effects and genetic drift from bottleneck populations (surviving the plague?) may explain the commonness of the mutation in central Scandinavia. The intergenerational time difference >30 yr was greater than expected and means that the age of the original mutation may be underestimated.
The A1-B8 haplotype hitchhiking with the C282Y mutation was not associated with a more efficient iron absorption. On the contrary, males with double copies of this haplotype expressed a milder phenotype, possibly an effect of local (environmental and/or genetic) factors.
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