What does Fst mean in population genetics?

What does Fst mean in population genetics?

What does Fst mean in population genetics?

Related to statistical analysis of variance (ANOVA) FST is the proportion of the total genetic variance contained in a subpopulation (the S subscript) relative to the total genetic variance (the T subscript). Values can range from 0 to 1. High FST implies a considerable degree of differentiation among populations.

What do Fst mean?


Acronym Definition
FST Field Sobriety Test
FST Federal Sales Tax
FST Financial Services Technology
FST Food Science & Technology (various organizations)

What is Fst and RST?

” Rst is a pairwise population genetic distance that is analogous to Fst, but that takes into account differences in the number of repeats between microsatellite alleles (allele size). This test indicates whether or not allele sizes provide more information on population differentiation.

What does a negative Fst value mean?

Negative Fst values should be effectively seen as zero values. A zero value for Fst means that there is no genetic subdivision between the populations considered. The negative Fst is considered as 0. No difference between two populations was found.

What does pairwise Fst mean?

When calculated within one population, Fst is a measure of average pairwise distances between pairs of individuals (haplotypes) in terms of allele frequencies. For between population comparisons Fst is more intuitive and basically is a “difference” between allele frequencies of two populations.

What is considered a high Fst?

There is no “official consensus” among population geneticists, because Fst is a parameter that only makes sense in comparative analyses among several populations. Fst values above 0.5 are normally considered as strong population subdivision.

What is Slatkin’s linearized FST?

Slatkin’s linearized Fst (Slatkin 1995), which is based on an infinite alleles model, was calculated between all population pairs using Arlequin v. Significant values for Fst (P ≤ 0.05) estimated from haplotype (mtDNA) and allele (microsatellite loci) frequencies were calculated by permutation testing.

What does Fst 1 mean?

FST Values. The fixation index can range from 0 to 1, where 0 means complete sharing of genetic material and 1 means no sharing. For values equal to 1(meaning no sharing), scientists say that the populations are fixed.

What does Wright’s Fst measure?

The fixation index (FST) is a measure of population differentiation due to genetic structure. Developed as a special case of Wright’s F-statistics, it is one of the most commonly used statistics in population genetics.

What do negative Fst values mean?