Characterization of genetic-biochemical polymorphism of enzymes in brazilian Mangalarga mares

Abstract

In this tudy the polymorphism of transferrins was determined using polyacrylamide gel electrophoresis, in a group of Brazilian Mangalarga mares. Blood plasma samples of 45 mares in reproductive age were used. The existence of patterns of 2, 3 and 4 bands with different mobilities, and of nine transferrin genotypes was demonstrated. Genotypes DD (22.2%) and DF (26.6%) were the most frequent, which is compatible with the situaiton found in the breeds of origin (Adalusian, Thoroughbred and Arabian) of the Mangalarga horse. The allele FfD was the most frequent, and could represent a possible environmental adaptation or a characteristic of sadle horses.