Complex genetic relationship analysis of aged bones and teeth
Objective To identify the complex relationship by extracting DNA from old bones and teeth.Methods The femurs and teeth of No.1-4 remains were pretreated,and DNA was extracted by using a large system difficult material DNA extraction instrument,and quantitated.The blood samples were extracted on the 96 fully automated workstations.all samples were amplified by using 5 different kits,such as VeriFiler Plus.The mtDNA of No.1 remains and Sun1 were sequenced.Results Based on the results of autosomal STR genotypes,the parental relationship between No.1 remains and No.2 remains was found.And grandparental relationships among No.1 remains and Jia 1,Jia 2,Jia 3 and Sun 1 were found.According to the results of Y chromosome STR genotypes,the No.2 and No.3 remains were tended to come from the same paternal lineage as Jia 1,Jia 2 and Jia 3,while the relationship of No.4 remains and Jia 1 et al,were excluded,and did not conform to the genetic characteristics of the same paternal line.Based on the results of mtDNA whole genome genotypes,it cannot be ruled out that the No.1 remains and Sun 1 come from the same maternal line.Conclusion By Optimizing the pretreatment and extraction methods,combined analysis of multi-genotyping system and multiple detection methods and based on multiple judging criteria of kinship could help to address more complex kinship tests in difficult specimens such as aged bones,teeth and so on.
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