Testing the heterogeneity of F values: a suggestion and a correction

Abstract

The use of a pair of populations removes the problems posed by a structured phylogeny (pointed out by A. Robertson) and permits the application of the original test of Lewontin and Krakauer. In the case of 2n populations studied a suggestion is made to use only n pairs in such a way that no population appears in more than one pair. Data on Dacus analyzed this way show that at least 2 out of 6 genes studied are or have been selected.