Blood groups of the Irish

Area of Science:

• Population Genetics
• Immunogenetics
• Anthropology

Background:

• Understanding blood group antigen distribution is crucial for population studies.
• Previous data on Irish blood groups exists, but requires updated analysis.
• Interpreting blood group variations can offer insights into historical population migrations.

Purpose of the Study:

• To determine the frequencies of various blood group antigens in Irish donors.
• To compare these frequencies with existing data for Ireland and other European populations.
• To infer potential population movements and their genetic impact on Ireland.

Main Methods:

• Serological testing of blood samples from approximately 1800 donors.
• Analysis of a comprehensive panel of blood group antigens including ABO, MNS, Rh, Kell, Duffy, and others.
• Comparative statistical analysis of obtained frequencies against historical and European data.

Main Results:

• Blood group antigen frequencies in Ireland are largely consistent with those found in mainland Europe.
• No significant regional variations were observed across the provinces of Ireland.
• A notable exception is a high frequency of the O blood group in Western Ireland, possibly linked to Mesolithic populations.

Conclusions:

• The overall blood group profile of Ireland aligns with broader European patterns.
• Evidence suggests limited genetic influence from significant population movements in recent history.
• The high O frequency in the West may represent a genetic marker of ancient inhabitants.