01868naa a2200289 a 450000100080000000500110000800800410001902400460006010000220010624500940012826000090022252010070023165000110123865300200124965300130126965300220128265300160130470000220132070000210134270000230136370000250138670000190141170000200143070000250145070000190147577300840149415962822024-02-08       2008    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.4238/vol7-3gmr4282DOI1 aAZEVEDO, A. L. S.  aGenetic polymorphism of the kappa-casein gene in Brazilian cattle.h[electronic resource]  c2008  aFrequencies of kappa-casein gene alleles were determined in 1316 animals from the Brazilian Bos indicus genetic groups (Sindhi cows, Gyr sires, Gyr cows, Guzerat sires, Guzerat cows, Nellore sires, and Gyr x Holstein crossbreds) by means of polymerase chain reaction-restriction fragment length polymorphism analysis using two independent restriction nucleases (Hinf I and HaeIII). The genotyping of kappa-casein alleles (A and B) is of practical importance, since the B allele is found to correlate with commercially valuable parameters of cheese yielding efficiency. The frequencies of the B allele of kappa-casein among breeds ranged from 0.01 to 0.30. The Sindhi breed had the highest frequency for the B allele (0.30), while the frequencies of this allele in other breeds ranged from 0.01 to 0.18. A wide variation in the B allele frequency among B. indicus breeds was found suggesting that molecular selection for animals carrying the B allele could impact breeding programs for dairy production.  acasein  aCandidate genes  ak-casein  aMolecular markers  aZebu cattle1 aNASCIMENTO, C. S.1 aSTEINBERG, R. S.1 aCARVALHO, M. R. S.1 aPEIXOTO, M. G. C. D.1 aTEODORO, R. L.1 aVERNEQUE, R. S.1 aGUIMARÃES, S. E. F.1 aMACHADO, M. A.  tGenetics and Molecular Research, Ribeirão Pretogv. 7, n. 3, p. 623-630, 2008.