Distribution of eight blood-group systems and ABH secretion in Mongolian, Korean, and Zhuang nationalities in China.

Among different blood-group systems investigated here, the distribution of the ABO system varies most of all, followed by MNSs and P. Although there are differences in ABH secretion in the different populations, no striking regularity has been found. No significant difference has been found in the distribution of the blood-group systems Rhesus, Diego, Duffy, Kell and Kidd in these Chinese populations: the Rh (-) rate is less than 1%, the frequency of Dia is about 0.04, the frequency of Fya is rather high, the frequency of K extremely low and Jka is about 0.4. In the three nationalities under study, Mongolians are characterized by a high frequency of IB, M higher than 0.5 and a relatively high frequency of P1. Koreans are characterized by a high frequency of IA, slightly more M than N and rather high CDE in the Rh system. The peculiarities of the Zhuangs are a rather high frequency of IO and M and the lowest frequency of P1.