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Population studies in northern Sweden. XV. Transferrin C subtypes
C Sikström1, P O Nylander, L Beckman
1Department of Medical Genetics, University of Umeå, Sweden.
Human Heredity
|January 1, 1988
Summary
This study analyzed transferrin C (TF C) subtypes in Finnish and Swedish populations, revealing significant geographical variations. The TF C3 gene and rare transferrin genes showed patterns suggesting Finnish influence in northern Sweden.
Area of Science:
- Human Genetics
- Population Genetics
- Biochemistry
Background:
- Transferrin C (TF C) subtypes are important genetic markers.
- Understanding their geographical distribution can reveal population movements and influences.
Purpose of the Study:
- To investigate the frequencies of transferrin C (TF C) subtypes in Finnish and Swedish populations.
- To identify geographical variations and potential ethnic influences on TF C gene distribution in northern Sweden.
Main Methods:
- Analysis of transferrin C (TF C) subtype frequencies in 315 Finns, 222 Swedish Lapps, and 4,157 individuals from northern Sweden.
- Statistical examination of gene frequencies across 23 subpopulations to detect heterogeneity and clines.
Main Results:
- Significant heterogeneity in TF C1, C2, C3, and rare gene frequencies was observed among 23 Swedish subpopulations.
- Clines for TF C1, C3, and rare genes were identified, with frequencies increasing southwestward, northeastward, and northward, respectively.
- The highest reported frequencies of the TF C3 gene were found in Finland and northern Sweden (14-15%), suggesting Finnish influence.
Conclusions:
- Geographical variations in TF C3 and rare transferrin genes in northern Sweden are likely influenced by Finnish populations.
- TF C1 and C2 gene variations may be attributed to random genetic drift or selective pressures rather than ethnic factors.