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Published online by Cambridge University Press: 19 May 2025
The aim of this study was to investigate the association of the rs43389227, rs43390124 and rs482883241 single-nucleotide polymorphisms (SNPs) of the bovine calcium channel, voltage-dependent, alpha-2/delta subunit 1 (CACNA2D1) gene with milk yield and quality traits in Holstein cattle. For this purpose, 166 Holstein dairy cows were genotyped for these three SNPs. Correlation analyses showed that the rs43389227 SNP was associated with 305-day milk yield (P < 0.05). Besides, rs43390124 SNP was found to be associated not only with 305-day milk yield but also with milk fat, milk quality traits, somatic cell score, electrical conductivity and pH (P < 0.05). The results of this study suggest that the rs43389227 and rs43390124 SNPs could be used in breeding for the improvement of milk yield and milk quality in cattle. Furthermore, based on its association with mastitis related traits, the rs43390124 SNP was considered as a potential indicator of mastitis susceptibility.