01946naa a2200301 a 450000100080000000500110000800800410001910000190006024501910007926000090027052009920027965000160127165000170128765300230130465300200132765300190134765300280136665300130139470000260140770000190143370000180145270000180147070000250148870000170151370000250153070000200155577300690157510446942021-12-14       1999    bl uuuu     u00u1 u    #d1 aKEMENES, P. A.  aK-Casein, B-Lactoglobulin and growth hormone allele frequencies and genetic distances in Nelore, Gyr, Guzará, Caracu Charolais Canchim and Santa Gertrudis cattle.h[electronic resource]  c1999  aThe genotypes for x-casein (x-CN), p-lactoglobulin -LG) and growth hormone (GH) were determined by polymerase chain reaction (PCR) and restriction enzyme digestion in seven breeds of cattle (Nelore, Gyr, Guzera, Caracu, Charolais, Canchim and Santa Gertrudis). k-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, Guzera and Nelore, respectively). The p-lactoglobulin locus had two alleles in all of the breeds. European breeds had a higher frequency of the p-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.  abeef cattle  aGado Canchim  aAllele frequencies  ab-lactoglobulin  aGrowth hormone  aHormonio de crescimento  ak-casein1 aREGITANO, L. C. de A.1 aROSA, A. J. de1 aPACKER, I. U.1 aRAZOOK, A. G.1 aFIGUEIREDO, L. A. de1 aSILVA, N. A.1 aETCHEGARAY, M. A. L.1 aCOUTINHO, L. L.  tGenetics and Molecular Biologygv.22, n.4, p.539-541, dez. 1999.