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Abstract
Background: The importance to detect the genetic polymorphism for milk protein genes in dairy cattle populations is the relationship of these genes with cheese yield, rennet time, and curd firmness. Mexican dairy cattle populations have been developed from genetic resources from around the world. It has incorporated a wide base of milk protein genes. The objectives were to estimate the allelic and genotypic frequencies, genetic diversity and polymorphic information content for the β-casein, κ-casein and β-lactoglobulin genes in Mexican Jersey populations.
Results: The β-casein allele with the highest frequency was A2 (0.71), followed by A1 (0.19), A3 (0.05), B (0.04), and C (0.01). The B allele of κ-casein had higher frequency (0.69) than the A (0.26) and E (0.05). For β-lactoglobulin, the most frequent allele was B (0.72), followed by A (0.26) and C alleles (0.02). The average genetic diversity (He) was 0.53. The average locus effective allele number was 1.79.
Conclusions: There is a high allelic diversity for κ-caseín, β-casein, and β-lactoglobulin in the population studied. It could be included in breeding programs aimed to improve the milk quality traits of economic importance.Upon acceptance of an article by the journal, authors will be asked to transfer the copyright to Electronic Journal of Biotechnology, which is committed to maintain the electronic access to the journal and to administer a policy of fair control and ensure the widest possible dissemination of the information. The author can use the article for academic purposes, stating clearly the following: "Published in Electronic Journal of Biotechnology at DOI:10.2225/volXX-issueX-fulltext-XX".
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