Genetic polymorphism of the kappa-casein gene in Brazilian cattle.

Frequencies 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.

Bibliographic Details

Main Authors:	AZEVEDO, A. L. S., NASCIMENTO, C. S., STEINBERG, R. S., CARVALHO, M. R. S., PEIXOTO, M. G. C. D., TEODORO, R. L., VERNEQUE, R. S., GUIMARÃES, S. E. F., MACHADO, M. A.
Other Authors:	Ana Luísa Sousa Azevedo, Embrapa Gado de Leite / UFV; C. S. Nascimento, UFV; R. S. Steinberg, UFMG; Maria Raquel Santos Carvalho, UFMG; Maria Gabriela Campolina Diniz Peixoto, Embrapa Gado de Leite; Roberto Luiz Teodoro, Embrapa Gado de Leite; Rui da Silva Verneque, Embrapa Gado de Leite; S. E. F. Guimarães, UFV; Marco Antônio Machado, Embrapa Gado de Leite.
Format:	Artigo de periódico biblioteca
Language:	eng
Published:	2009-03-17
Subjects:	Zebu cattle, Candidate genes, k-casein, Molecular markers, casein,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/596282 https://doi.org/10.4238/vol7-3gmr428
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