Red cell enzyme polymorphisms in the Balearic Islands. I. Substructuring of the Mallorca population.

A sample of 2143 individuals belonging to six natural geographic regions from Mallorca (Balearic Is. Spain, 39.5N, 3.0E) was studied for the red cell enzyme polymorphisms: Esterase-D (ESD), acid phospatase-1 (ACP1), glyoxalase-I (GLO1), phosphogluconate dehydrogenase (PGD), phosphoglucomutase-1 (PGM1) and adenylate-kinase (AK1). The following gene frequencies were obtained: ESD2'3 = 0.142, ACP1A = 0.248, ACP1C = 0.027, GLO12 = 0.529, PGDC = 0.010, PGM12 = 0.221 and AK1*2 = 0.033. Most of these gene frequencies were in Hardy-Weinberg equilibrium. The subpopulation of "La Muntanya" showed significant differences for some allozymes respect to the others, in accordance with its geographic peculiarity.