Investigation of genetic variability in the Mantiqueira herd through protein polymorphism. I - Genetic characterization and comparative studies

Authors

  • Maria Aparecida Cassiano Lara Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Pesquisa e Desenvolvimento em Genética e Reprodução Animal, Nova Odessa, SP
  • Guilherme Paes Guaragna Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Estação Experimental de Zootecnia de Pindamonhangaba, Pindamonhangaba, SP
  • Roberto Hauck Heichert Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Estação Experimental de Zootecnia de Pindamonhangaba, Pindamonhangaba, SP
  • Luciano Ricardo Marcondes da Silva Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Estação Experimental de Zootecnia de Pindamonhangaba, Pindamonhangaba, SP
  • Eucleia Primo Betioli Contel Universidade de São Paulo, Faculdade de Medicina de Ribeirão Preto, Departamento de Genética, Ribeirão Preto, SP

Keywords:

heterozygosity, protein polymorphism, Mantiqueira cattle, genetic characterization

Abstract

The Mantiqueira cattle has recently been considered a Brazilian native breed, resultant from one of the selection programs of the Instituto de Zootecnia for milk production on pasture. The characterization of genetic variability was accomplished by electrophoretic analysis of proteins. Some loci were chosen for showing alleles which appeared in specific frequencies or exclusive alleles in breeds belonging to groups Bos indicus and Bos taurus , such as CaZ, Pep-B1 e Alband alleles Cae Pep-B3, respectively. To the Mantiqueira herd the respective frequencies of alleles HbA, HbB, CaS, CaF, Pep-B1, Pep-B2, Pep-B3 Am-I B, Am-Ic, AlbA , A!bB, TfA TfD and TfE were 0.962 ± 0.013 and 0.038 ± 0.013; 0.890 ± 0.022 and 0.110 ± 0.022; 0.118 ± 0.023, 0.818 ± 0.026 and 0.064 ± 0.015; 0.547 ± 0.033 and 0.453 ± 0.033; 0.897 ± 0.021 and 0.103 ± 0.021; 0.256 ± 0.029, 0.573 ± 0.030 and 0.171 ± 0.024. The values of P, PA, Ap e H, that express the genetic variability in the loci Hb, CA, Pep-B, PGD, SOD, Am-I, Alb and Tf were the following: 0.750; 0.8890; 2.3 and 0.1814 ± 0.0683. These high values obtained from Mantiqueira herd when compared to European breeds suggest that this herd displays a remarkable potential for selection and improvement programs. Besides, the non occurrence of specific zebu alleles in the studied herd suggest that, if existed, they were replaced by Holstein aleles many decades ago.

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Published

2013-12-05

Issue

Section

GENETIC

How to Cite

Investigation of genetic variability in the Mantiqueira herd through protein polymorphism. I - Genetic characterization and comparative studies. (2013). Bulletin of Animal Husbandry, 54(1), 1-12. http://bia.iz.sp.gov.br/index.php/bia/article/view/971

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