Kappa and beta-casein alleles in dairy zebu cattle.

The kappa () and beta-casein () genes are intensively genotyped in dairy cattle for selection purposes. This information is also generated and disseminated for Zebu breeds adapted to tropical climates. The objective of this work was to gather information on the genotypes for the and genes in three breeds (Gyr, Guzerat and Sindhi), and to verify the genotypic frequencies in the populations.