Abstract：
:Uniparental disomy (UPD) has attracted more attention recently in paternity testing, though it is an infrequent genetic event. Although short tandem repeat (STR) profiling has been widely used in paternity testing, it is not sufficient to use STR only to judge the genetic relationship, because the existence of UPD will inevitably affect the results of genotyping. Compared with complete UPD, segmental UPD is more difficult to detect because it does not affect all genotypes on the same chromosome. It is necessary to determine the type of UPD with multiple methods because a single method is not sufficient. Therefore, it is advisable to detect UPD in paternity testing with multiple methods. In this study, after autosomal STR profiling was used, we found that there were several gene loci on the same chromosome that did not conform to Mendelian genetic law, thus we highly suspected the existence of UPD and performed X-STR profiling immediately. Then whole-genome single nucleotide polymorphism (SNP) array analysis was performed to identify the type, and the results provided straightforward evidence for distinguishing complete from segmental UPD. Lastly, we used deletion insertion polymorphism (DIP)-SNP SNaPshot assay and Miseq FGx sequencing (for SNP and STR) to determine whether the mutation source is maternal uniparental disomy (mUPD) or paternal uniparental disomy (pUPD). To avoid false exclusion of kinship, it is vital to determine the type of UPD in paternity testing and effective strategies based on multiple methods to detect the type of UPD are provided in this study.
journal_name
Int J Legal Medjournal_title
International journal of legal medicineauthors
Su H,Sun T,Chen M,Liu J,Wang X,Chen Y,Ren W,Zhang G,Yan J,Yun Kdoi
10.1007/s00414-019-02215-wsubject
Has Abstractpub_date
2020-05-01 00:00:00pages
885-893issue
3eissn
0937-9827issn
1437-1596pii
10.1007/s00414-019-02215-wjournal_volume
134pub_type
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