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BIBTEX RIS

<FONT FACE=Symbol>k</FONT>-Casein, <FONT FACE=Symbol>b</FONT>-lactoglobulin and growth hormone allele frequencies and genetic distances in Nelore, Gyr, Guzerá, Caracu, Charolais, Canchim and Santa Gertrudis cattle

1999; Brazilian Society of Genetics; Volume: 22; Issue: 4 Linguagem: Inglês

10.1590/s1415-47571999000400012

1678-4685

Paola Augusta Kemenes, Luciana Correia de Almeida Regitano, Artur J.M. Rosa, Irineu Umberto Packer, Alexander George Razook, Leopoldo Andrade de Figueiredo, Nirlei Aparecida Silva, M A L Etchegaray, Luiz Lehmann Coutinho,

Animal Genetics and Reproduction

The genotypes for k-casein (<FONT FACE="Symbol">k</FONT>-CN), <FONT FACE="Symbol">b</FONT>-lactoglobulin (<FONT FACE="Symbol">b</FONT>-LG) and growth hormone (GH) were determined by polymerase chain reaction (PCR) and restriction enzyme digestion in seven breeds of cattle (Nelore, Gyr, Guzerá, Caracu, Charolais, Canchim and Santa Gertrudis). <FONT FACE="Symbol">k</FONT>-Casein had two alleles with the A allele occurring at a higher frequency in Bos indicus breeds (0.93, 0.92 and 0.91% for Gyr, Guzerá and Nelore, respectively). The <FONT FACE="Symbol">b</FONT>-lactoglobulin locus had two alleles in all of the breeds. European breeds had a higher frequency of the <FONT FACE="Symbol">b</FONT>-LG A allele than Zebu breeds. The GH locus had two alleles (L and V) in Bos taurus and was monomorphic (L allele only) in all of the Bos indicus breeds evaluated. The highest frequency for the V allele was observed in Charolais cattle. The markers used revealed a considerable similarity among breeds, with two main groups being discernible. One group consisted of Zebu and Santa Gertrudis breeds and the other consisted of European and Canchim breeds.