QST (genetics)

In quantitative genetics, Q_ST is a statistic intended to measure the degree of genetic differentiation among populations with regard to a quantitative trait. It was developed by Ken Spitze in 1993. Its name reflects that Q_ST was intended to be analogous to the fixation index for a single genetic locus (F_ST). Q_ST is often compared with F_ST of neutral loci to test if variation in a quantitative trait is a result of divergent selection or genetic drift, an analysis known as Q_ST–F_ST comparisons.

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