Analysis of 16 Y STR Loci in the Finnish Population Reveals a Local Reduction in the Diversity of Male Lineages

Forensic Sci Int. 2004 May 28;142(1):37-43. doi: 10.1016/j.forsciint.2003.07.003.

Abstract

We analysed samples of 400 Finnish males using nine Y-chromosomal short tandem repeat (STR) loci (minimal haplotype); for 200 of these subjects an additional seven Y-chromosomal STR loci were used. The geographical distribution of the observed haplotypes was determined from 200 individuals of known paternal origin within Finland. The observed number of alleles varied from 2 to 13 alleles per locus. A total of 146 minimal haplotypes were identified in our population sample. Interestingly, 90 (22.5%) individuals shared an identical haplotype. This haplotype was extremely frequent in the northern and eastern subpopulations of Savo, Pohjanmaa and Karjala (53, 42 and 37%, respectively). With the seven additional loci analysed in the sample of 200 individuals, 120 haplotypes were identified, and individuals sharing the most common haplotype decreased to 13.0%. However, in comparison to other European populations, the Finnish population showed decreased genetic diversity (GD) when the number of different minimal haplotypes in the population was divided by the sample size (36.5% in Finns versus 83.7% on average). Our results strongly support the earlier hypothesis of individual isolated Y-chromosomal lineages and population substructuring in Finland. For paternity testing, power of exclusion was 92% using minimal haplotype data, but including the seven additional loci this value increased to 97%.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Chromosomes, Human, Y*
  • DNA Fingerprinting / methods
  • Finland
  • Gene Frequency
  • Genetic Variation*
  • Genetics, Population*
  • Haplotypes*
  • Humans
  • Male
  • Middle Aged
  • Paternity
  • Tandem Repeat Sequences*