Peptidase B polymorphism in cattle erythrocytes |
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| Authors: | Silvia N. Del Lama M. A. Del Lama M. A. Mestriner N. Mortari |
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| Affiliation: | 1. Departamento de Genética e Evoluc?o, Universidade Federal de S?o Carlos, CP 676, 13560, S?o Carlos, SP, Brasil
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| Abstract: | Starch gel electrophoresis and histochemical staining withl-leucylglycyl-glycine revealed genetic polymorphism in peptidase B in cattle erythrocytes. Genetic analysis of 164 full families indicated that the three phenotypes observed are the product of an autosomal locus with two codominant alleles,PepB 1 andPep B 2, A sample consisting of 2630 individuals representing 5 Zebu, 13 European, and 2 crossbred breeds was studied. This polymorphism was observed in all Zebu and crossbred breeds. The frequency of thePep B 1 allele was 0.89, 0.83, 0.59, 0.82 and 0.62 in the Nellore, Gyr, Guzerat, Indubrazil, and Tabapuan breeds, respectively. ThePep B 2 allele appears to be fixed in the European breeds, except Marchigiana and Chianina. This work was supported by the Brazilian Research Council (CNPq). |
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| Keywords: | peptidase B biochemical polymorphism cattle breeds gene frequencies isozymes |
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