The main task was to estimate the allelic and genotypic frequencies, genetic diversity and polymorphic information content for the β-casein, κ-casein and β-lactoglobulin genes. Blood and frozen semen samples were collected of 453 Jersey individuals registered by the Mexican Jersey Cattle Association. 28 breed specific SNP primers for whole genes were used. The B allele of κ-casein had higher frequency (0.80) than the A (0.15) and E (0.05). For β-lactoglobulin, the highest frequency was for B (0.76), followed by A and C alleles (0.22 and 0.02, respectively). The β-casein allele with higher frequency was A2 (0.62), followed by A1 (0.18), A3 (0.09) and B (0.11). The average genetic diversity (He) was 0.424, with a locus effective allele number of 0.5. These results indicated a high allelic diversity of κ-caseín, β-casein and β-lactoglobulin in Mexican Jersey cattle. 

Jose Luis Zepeda-Batista, Baldomero Alarcon-Zuniga, Agustin Ruiz-Flores, Rafael Nunez-Dominguez, Rodolfo Ramirez-Valverde

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume Genetic Improvement Programs: Selection using molecular information (Posters), , 478, 2014
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