1994, Number 3
Vet Mex 1994; 25 (3)
Genetic polymorphism of albumin, haemoglobin and transferin systems in hibrid Holstein-Zebu cattle in the humid tropics
Rebollo AAG, Acosta RR, Velázquez EA, Atilano LD, Pérez RH
PDF size: 475.53 Kb.
ABSTRACTTwo hundred seventy nine blood samples from crossbred cattle 1/2, 3/4 and 5/8 Holstein x Zebu were studied. Phenotypes of polymorphic blood systems in albumins (Al), hemoglobins (Hb) and transferrins (Tf) were obtained by zonal electroforesis in starch gels. Blood systems were used for a paternity test in animals with undetermined genotype. The phenotype and genotype frequencies in F1 were: Al-F = 0.67, Al-S = 0.34, Hb-A = 0.84, Hb-B = 0.16, Tf-A = 0.34, Tf-D = 0.54, Tf-E= 0.12; in 3/4H 1/4Z: Al-F = 0.81, Al-S = 0.19, Hb-A = 0.90, Hb-B = 0.09, Hb-F = 0.0 1, Tf-A = 0.26, Tf-D = 0.64, Tf-E = 0.10; and in 5/8H 3/8Z: Al-F = 0.73, Al-S = 0.27, Hb-A = 0.74, Hb-B = 0.24, Hb-F = 0.02, Tf-A = 0.42, Tf-D = 0.49 and Tf-E = 0.09. It was found that alleles which have their origin from Bos taurus, appear frequently. Results were highly significant as far as the independency of genotypes. As a test for paternity exclusion, the transferrin system was not adequate, since it was not possible to discriminate between sires, because their progenies had similar alleles.