Allele frequency polymorphism of Duffy, Kidd, Diego blood group system: a study in Dongxiang ethnic group in Gansu Province

Objective To investigate the allele frequencies polymorphic distribution of Duffy, Kidd and Diego blood group systems in Dongxiang ethnic group in Gansu Province. Methods Blood samples of 100 unrelated blood donors were randomly selected from Dongxiang ethnic group in Gansu from January to December 2017. Allelic typing of Duffy, Kidd and Diego blood groups was performed by fluorescence PCR. Results The allele frequencies of Duffy, Kidd, and Diego blood group systems of Dongxiang ethnic group were 0.835 for Fy*01, 0.165 for Fy*02, 0.570 for Jk*01, 0.430 for Jk*02, 0.020 for DI*01, 0.980 for DI*02, respectively. No Fy(a-b-), Jk(a-b-), Di(a+b-) rare phenotypes were found. The antigen incompatibility rates of Fya/Fyb, Jka/Jkb, Dia/Dib of Duffy, Kidd, and Diego blood group systems were 23.76%, 37.01% and 3.84%, respectively. Conclusion The allele frequencies distribution of Duffy, Kidd and Diego blood group systems in Dongxiang ethnic group in Gansu were polymorphic and has unique ethnic distribution characteristics.