Red cell enzyme polymorphisms in the Balearic Islands. II. A comparison based on multivariate analyses

Area of Science:

• Population genetics
• Human genetics
• Biochemical genetics

Background:

• The Balearic Islands (Mallorca and Eivissa) present a unique opportunity to study genetic diversity within European populations.
• Previous genetic studies on these islands are limited, necessitating further investigation into population structure.

Purpose of the Study:

• To analyze the genetic structure of populations from Mallorca and Eivissa using red cell enzyme polymorphisms.
• To identify which enzyme systems are most informative for characterizing these specific Caucasian populations.
• To assess genetic distances among different geographic regions within the Balearic Islands.

Main Methods:

• Analysis of six red cell enzyme systems: Esterase-D (ESD), acid phosphatase-1 (ACP1), glyoxalase-I (GLO1), 6-phosphogluconate dehydrogenase (PGD), phosphoglucomutase-1 (PGM1), and adenylate-kinase (AK1).
• Study involved 2143 individuals from six regions of Mallorca and 390 individuals from Eivissa.
• Multivariate statistical analyses including principal components, factorial correspondence, and cluster analyses were employed.

Main Results:

• Acid phosphatase-1 (ACP1) and Esterase-D (ESD) enzyme systems proved most effective for characterizing the Caucasian populations of the Balearic Islands.
• Glyoxalase-I (GLO1) was significant when analyzing diverse ethnic groups.
• Balearic gene frequencies align with European standards, with minor genetic distances observed between populations, except for the highly differentiated "La Muntanya" region.

Conclusions:

• ACP1 and ESD are valuable genetic markers for differentiating Balearic populations.
• The genetic landscape of the Balearic Islands shows subtle regional variations, with "La Muntanya" exhibiting notable genetic distinctiveness.
• The study confirms that Balearic gene frequencies are consistent with broader European patterns.