Differential A1/A2 β-casein (<i>CSN2</i>) gene-derived allelic and genotypic frequencies across Ecuadorian exotic dairy cattle breeds.

ABSTRACT: Recently, a growing interest in dairy cattle selection has been triggered due to specific genetic variations of the β-casein (CSN2) gene which was associated to several human disorders. The aim of the present study was to evaluate the A1/A2 β-casein (CSN2) gene-derived allelic and genotypic frequencies in five Ecuadorian dairy cattle breeds to determine the genetic diversity of the A1/A2 β-casein locus. Genomic Deoxyribonucleic Acid (gDNA) was extracted from hair samples collected from different dairy cattle breeds, namely Holstein Friesian (HF), Brown Swiss (BS), Jersey (J), Gyr (G), and crossbreds (CB) raised commonly in seven different regions in order to identify A1 and A2 variants. Genomic determination of the β-casein (CSN2) gene variants was carried out evaluati

SUBMITTER: Cartuche-Macas LF 

PROVIDER: S-EPMC12285589 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature