1985 Volume 56 Issue 3 Pages 199-203
In paper electrophorograms, free amino acid types in red blood cells of 316 Thoroughbred, 69 Anglo-Arab and 10 Tokara-native horse were classified by variations of relative density of basic amino acid zone. The phenotype frequencies and the inheritance mode of free amino acid type were investigated. 1) Horse red blood cells were divided into two types, namely BA+type and BA-type. Frequencies of appearance of BA+type in each breeds of horse were 40.2% in Thoroughbred, 43.5%in Agnlo-Arab and 50% in Tokara-native horse, respectively. 2) Comparison between observed and expected numbers of free amino acid types of offsprings from various mating types were tried. The data suggest that the phenotype of free amino acid type is controlled by a single pair of autosomal alleles, giving rise to two free amino acid types, BA+type (BAl) and BA-type (BAL), the BAL allele being dominant. In other words, the genotype of BA+type is homozygoto of BAl gene, and BA-type is homozygote of BAL gene or heterozygote of BAL and BAl genes. Therefore the free amino acid types observed about basic amino acid zone in paper electrophorograms of horse red blood cells in named to the BA system. 3) x2-test between observed and expected numbers of various mating types were given. Frequencies of appearance of number of matings in Anglo-Arab were insignificant difference among various mating types (x2=1.321, 0.30<p). But in Thoroughbred, relative utilized rate of stallion of BA-type was significantly higher than that of BA+type (x2=8.342, p<0.05).
