Selection component analysis of the PGI polymorphism in sphaeroma rugicauda

Abstract

Genotype frequencies in samples of males, sterile females, fertile females and random offspring were used to determine whether natural selection was acting on a diallelic phosphoglucose isomerase polymorphism. There was some evidence that female participation in reproduction depended upon genotype. The most consistent and significant effect was that the frequency of alleles transmitted from males to offspring varied with the genotype of the mother. The direction of this effect was such as to maintain both alleles in the population. © The Genetical Society of Great Britain.