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Related Experiment Videos

Peptidase B polymorphism in cattle erythrocytes.

S N Del Lama1, M A Del Lama, M A Mestriner

  • 1Departamento de Genética e Evolucão, Universidade Federal de São Carlos, SP, Brasil.

Biochemical Genetics
|June 1, 1992
PubMed
Summary

Genetic polymorphism in cattle erythrocytes was identified for peptidase B (PepB). This study found the PepB locus has two codominant alleles, PepB1 and PepB2, present in Zebu and crossbred cattle breeds.

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Area of Science:

  • Animal Genetics
  • Biochemistry
  • Erythrocyte Analysis

Background:

  • Peptidase B (PepB) is an enzyme found in erythrocytes.
  • Understanding genetic variation in livestock is crucial for breeding programs.
  • Erythrocyte enzyme polymorphisms can serve as genetic markers.

Purpose of the Study:

  • To investigate genetic polymorphism in peptidase B in cattle erythrocytes.
  • To determine the genetic basis and inheritance of PepB phenotypes.
  • To analyze the distribution of PepB alleles across different cattle breeds.

Main Methods:

  • Starch gel electrophoresis was used to analyze erythrocyte proteins.
  • Histochemical staining with L-leucylglycyl-glycine identified PepB phenotypes.
  • Genetic analysis of 164 full families determined the mode of inheritance.

Related Experiment Videos

  • A large sample of 2630 individuals from various breeds was genotyped.

    • Main Results:

    • A genetic polymorphism in peptidase B (PepB) was detected in cattle erythrocytes.
    • Three phenotypes were observed, controlled by an autosomal locus with two codominant alleles: PepB1 and PepB2.
    • PepB polymorphism was present in Zebu and crossbred breeds.
    • PepB1 allele frequencies varied significantly among Zebu breeds (e.g., 0.89 in Nellore, 0.59 in Guzerat).
    • The PepB2 allele was nearly fixed in European breeds, with exceptions in Marchigiana and Chianina.

    Conclusions:

    • Peptidase B exhibits significant genetic polymorphism in cattle.
    • The PepB locus is autosomal with codominant alleles, providing a valuable genetic marker.
    • Allele frequencies differ notably between Zebu and European cattle populations.
    • This genetic marker can be utilized in cattle breeding and population genetics studies.