A De Finetti diagram illustrating the Wahlund effect. The curved line are the Hardy–Weinberg equilibrium genotype frequencies; points 1 and 2 denote two populations in equilibrium. The genotype frequencies of the combined population are a weighted mean of the subpopulation frequencies, corresponding to a point somewhere on the solid line connecting 1 and 2. This point always has a lower heterozygosity (y value) than the corresponding (in allele frequency p) Hardy-Weinberg equilibrium.
In population genetics, the Wahlund effect is a reduction of heterozygosity (that is when an organism has two different alleles at a locus) in a population caused by subpopulation structure. Namely, if two or more subpopulations are in a Hardy–Weinberg equilibrium but have different allele frequencies, the overall heterozygosity is reduced compared to if the whole population was in equilibrium. The underlying causes of this population subdivision could be geographic barriers to gene flow followed by genetic drift in the subpopulations.
The Wahlund effect was first described by the Swedish geneticist Sten Wahlund in 1928.[1]
^Wahlund, Sten (1928). "Zusammensetzung Von Populationen Und Korrelationserscheinungen Vom Standpunkt Der Vererbungslehre Aus Betrachtet". Hereditas. 11 (1): 65–106. doi:10.1111/j.1601-5223.1928.tb02483.x. ISSN 1601-5223.
In population genetics, the Wahlundeffect is a reduction of heterozygosity (that is when an organism has two different alleles at a locus) in a population...
William Wahlund (1901 — 1976) was a Swedish statistician, race biologist and politician. He is best known for first identifying the Wahlundeffect, that...
gamete recombination (fertilization) is uniformly possible. Both the Wahlundeffect and the Hardy Weinberg equilibrium assume that the overall population...
occur in allele frequencies under natural selection. Ternary diagram Wahlundeffect Cannings C., Edwards A. W. F. (1968) "Natural selection and the de Finetti...
isolation of two species populations (as in allopatric speciation). Wahlundeffect A phenomenon by which a reduction of heterozygosity at a particular...
(a.k.a. Benioff zone) – Kiyoo Wadati and Hugo Benioff Wahlundeffect – Sten Gösta William Wahlund Wallace's line – Alfred Russel Wallace Walras's law –...
had to do everything with no support'". PC Gamer. Retrieved 2024-03-19. Wahlund, Mark (2015-08-20). "Building Warhammer Vermintide with Stingray". 80.lv...
PMID 12297966. S2CID 21857769. Thilander, Birgit; Wahlund, Sonja; Lennartsson, Bertil (1984-01-01). "The effect of early interceptive treatment in children...
Oct;10(5):333-49. Jonassen I, Havelund S, Hoeg-Jensen T, Steensgaard DB, Wahlund PO, Ribel U. 2012 Design of the novel protraction mechanism of insulin...
Information (27 September 1997) Archived 2 May 2022 at the Wayback Machine Wahlund, Anders; Wallberg, Peter (1996). "Motorcykelgäng ställer polisen inför...
of the whole binomial distribution.: 382–395 : 49–63 Furthermore, the "Wahlund equations" show that the progeny-bulk homozygote frequencies can be obtained...
36 (11): 4217–4226. doi:10.1016/j.enpol.2008.07.028. S2CID 154810770. Wahlund, Madeleine; Palm, Jenny (May 2022). "The role of energy democracy and energy...
Global Information