Abstract
The single nucleotide polymorphisms on the Y chromosome (Y-SNP) have been considered to be important in forensic casework. However, Y-SNP loci were mostly population specific and lacked biallelic polymorphisms in the Asian population. In this study, we developed a strategy for seeking and genotyping new Y-SNP markers based on both Pyrosequencing and the SNaPshot methods. As results, 34 new biallelic markers were observed to be polymorphic in the Chinese Han population by estimation of allele frequencies of 103 candidate’s Y-SNP loci in DNA pools using Pyrosequencing technology. Then, a multiplex system with 20 Y-SNP loci was genotyped using the SNaPshot™ multiplex kit. Twenty Y-SNP loci defined 56 different haplotypes, and the haplotype diversity was estimated to be 0.9539. Our result demonstrated that the strategy could be used as an efficient tool to search and genotype biallelic markers from a large amount of candidate loci. In addition, 20 Y-SNP loci constructed a multiplex system, which could provide supplementary information for forensic identification.
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Acknowledgement
This study was supported by grants (30872917 and 81072510) from the National Nature Science Foundation, China.
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Table S1
Allele frequencies of 103 Y-SNP loci in DNA pools by Pyrosequencing in the Chinese Han population samples (n = 54) (DOC 111 kb)
Table S2
Twenty 20 Y-SNP primer sequences and concentrations for multiplex PCR amplifications (DOC 56 kb)
Table S3
Twenty Y-SNP primer sequences and concentrations for multiplied minisequencing reactions (DOC 54 kb)
Table S4
Allele for 34 Y-Chromosomal SNPs in the Chinese Han population sample using Pyrosequencing in individual sample (n = 54) (DOC 132 kb)
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Wei, W., Luo, HB., Yan, J. et al. Exploring of new Y-chromosome SNP loci using Pyrosequencing and the SNaPshot methods. Int J Legal Med 126, 825–833 (2012). https://doi.org/10.1007/s00414-011-0603-4
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DOI: https://doi.org/10.1007/s00414-011-0603-4