Abstract
Y chromosome has an important role in the forensic practice due to its unique paternal inheritance pattern. Y-chromosomal single nucleotide polymorphisms (Y-SNPs) could provide supplementary information while the application of Y-chromosomal STR (Y-STR) haplotypes encounter their limitations. Y-SNPs with recurrent mutation can be seen in different Y-chromosomal haplogroups, which might help discriminate different paternal pedigrees. In this study, a host of candidate Y-SNPs with recurrent mutation were obtained based on population data from 1000 Genome Project. Further, 8 Y-SNPs from a small part of candidates were confirmed to be polymorphic in 2 or more Y-chromosomal haplogroups (sub-haplogroups) in the Chinese Han population. With a haplotype diversity value of 0.9367, the investigated subset of Y-SNPs with recurrent mutation shows a high discrimination power. Therefore, Y-SNPs with recurrent mutation should function as useful markers to provide information in the forensic applications.
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