Abstract
Equine hemogulobin-α (Hb-α) types have been classified into ten genotypes using the four haploytypes of A, AII, BI and BII which have been identified internationally. However, Hb-α types with the new haplotype not being able to be applied to the ten known Hb-α types, were detected in Hokkaido native horses. These new variants were also observed in other foriegn breeds of horses as well. In addition, since all of these new Hb-α types are clearly controlled by the same new haplotype, this new haplotype was given the name of CII, and then, CI as another haplotype compared with the supposed haplotype CII type. At the same time, an additional classification for the Hb-α types with the new haplotype was demonstrated, and then, some problems for typing them and the differece in the Hb types between donkeys and horses were also discussed.
