Abstract
The genetic relationship between Kurds and Azeris of Iran was investigated based on human leukocyte antigen (HLA) class II profiles. HLA typing was performed using polymerase chain reaction/restriction fragment-length polymorphism (PCR/RFLP) and PCR/sequence-specific primer (PCR/SSP) methods in 100 Kurds and 100 Azeris. DRB1*1103/04, DQA1*0501 and DQB1*0301 were the most common alleles and DRB1*1103/04-DQA1*0501-DQB1*0301 was the most frequent haplotype in both populations. No significant difference was observed in HLA class II allele distribution between these populations except for DQB1*0503 which showed a higher frequency in Kurds. Neighbor-joining tree based on Nei's genetic distances and correspondence analysis according to DRB1, DQA1 and DQB1 allele frequencies showed a strong genetic tie between Kurds and Azeris of Iran. The results of amova revealed no significant difference between these populations and other major ethnic groups of Iran. No close genetic relationship was observed between Azeris of Iran and the people of Turkey or Central Asians. According to the current results, present-day Kurds and Azeris of Iran seem to belong to a common genetic pool.
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