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Investigação da variabilidade genética do rebanho mantiqueira através de polimorfismos protéicos I. caracterização genética e estudos comparativos

Authors: Maria Aparecida Cassiano Lara; Guilherme Paes Guaragna; Roberto Hauck Heichert; Luciano Ricardo Marcondes da Silva; Eucleia Primo Betioli Contel;

Investigação da variabilidade genética do rebanho mantiqueira através de polimorfismos protéicos I. caracterização genética e estudos comparativos

Abstract

O bovino Mantiqueira é atualmente considerado uma raça nativa brasileira, resultante de um dos programas de seleção do Instituto de Zootecnia para produção de leite a pasto. A caracterização da variabilidade foi realizada através de análises eletroforéticas. Alguns sistemas protéicos foram escolhidos por apresentarem determinados alelos que ocorrem em freqüências específicas, ou alelos exclusivos de raças pertencentes aos grupos Bos indicus eBos taurus, tais como os alelos Caz e Albc e os alelos Caf e Pep-B3, respectivamente. Para o rebanho Mantiqueira, as respectivas freqüências dos alelos HbA, Hbh, Cas, Caf, Pep- B1, Pep-B2, Pep-B3, Am-IB, Am-Ic, AlbA , AlbB, TfA, TfD TfEforam 0,962 ± 0,013 e 0,038 ± 0,013; 0,890 ± 0,022 e 0,110 ± 0,022; 0,118 ± 0,023, 0,818 ± 0,026 e 0,064 ± 0,015; 0,547 ± 0,033 e 0,453 ± 0,033; 0,897 ± 0,021 e 0,103 ± 0,021; 0,256 ± 0,029; 0,573 ± 0,030 e 0,171 ± 0,024. Os valores de P, Pa, Ap e H, que expressam a variabilidade genética existente nos Iocos da Hb, CA, Pep-B, PGD, SOD, Am-I, Alb e Tf, foram os seguintes: 0,750; 0,8890; 2,3 e 0,1814 ± 0,0683. Esses altos valores obtidos no rebanho Mantiqueira, quando comparados com as raças européias, sugerem que esse rebanho apresenta um grande potencial para programas de seleção e melhoramento. Além disso, a não ocorrência de alelos específicos zebuínos no rebanho estudado sugere que, se originalmente presentes, os alelos foram substituídos pelos da raça Holandesa, há muitas décadas.

Keywords

polimorfismo protéico, polimorfismo protéico, bovinos Mantiqueira, caracterização genética, caracterização genética, SF1-1100, heterozigosidade, Animal culture

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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Average
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