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Parentage analysis using genome-wide high-density SNP microarray.

Ju Long1

  • 1Xi'an Jiaotong University School of Basic Medical Sciences, Xi'an, Shaanxi 710061, PR China; Laboratory of Medical Genetics, Qinzhou Maternal and Child Health Care Hospital, Qinzhou, Guangxi 535099, PR China; Laboratory of Forensic, Judicial Authentication Institute of Qinzhou Jin Hai Wan, Qinzhou, Guangxi 535099, PR China; Qinzhou Key Laboratory of Molecular and Cell Biology on Endemic Diseases, Qinzhou, Guangxi 535099, PR China.

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Summary
This summary is machine-generated.

High-density SNP microarrays offer a viable alternative for parentage analysis when short tandem repeat (STR) testing yields ambiguous results. This genetic testing method effectively distinguishes familial relationships, aiding in complex paternity cases.

Keywords:
High-density SNP microarrayParentage analysisShort tandem repeatsSingle nucleotide polymorphisms

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Area of Science:

  • Forensic genetics
  • Human genetics
  • Molecular biology

Background:

  • Parentage analysis utilizes genetic methods to confirm or refute familial relationships.
  • Short tandem repeat (STR) technology is a common tool for parentage testing.
  • Ambiguous results from STR analysis in three families necessitated alternative methods.

Purpose of the Study:

  • To evaluate the feasibility of high-density single nucleotide polymorphism (SNP) microarrays for parentage analysis.
  • To explore SNP microarrays as an auxiliary method for kinship determination.

Main Methods:

  • Analysis of 180 samples, including unrelated individuals and family groups.
  • Utilized high-density SNP microarrays for genetic profiling.
  • Calculated SNP mismatch rates to assess relatedness.

Main Results:

  • SNP mismatch rates in unrelated individuals were 8-10 times higher than in parent-child pairs.
  • Established thresholds: >5.3% mismatch for no kinship, <0.6% mismatch for parent-child relationship.
  • Successfully applied SNP microarray analysis to assist in kinship determination for three families.

Conclusions:

  • High-density gene chip (SNP microarray) analysis is effective for auxiliary parentage analysis.
  • SNP microarrays provide a valuable alternative for resolving complex kinship cases.