DQA1*0102 is associated with both DR5 and DR6.
DQA1*0102:DQB1*0502 has a bimodal distribution. It is found in the Philippines in high frequency and on the Mediterranean island of Sardinia.
DQA1*0102:DQB1*0602 is a very common haplotype in Eurasia, with higher frequency in central Asia relative to elsewhere. It is part of a European ancestral haplotype B7-DR15-DQ1 that appears to have expanded asymmetrically into Europe. The A3-B7-DR15-DQ1 haplotype indicates relationships in Eurasia that span from Korea to Ireland, indicating some common ancestry in recent times.
DQA1*0102:DQB1*0604 much less frequently found but spread widely.