A new polymorphism in goat β-lactoglobulin promoter region

Abstract

An individual variability in β-lactoglobulin content has been previously observed in Girgentana goat milk by HPLC analysis. To identify eventual mutations affecting the transcription level of the gene, the prooter region was characterized in goats showing an anomalous phenotype, consisting in a reduced content of β-lactoglobulin respect to α-lactoalbumine. A single nucleotide substitution not previously reported has been detected. A PCR-RFLP procedure was developed for fast detection of the mutation in different goat breeds: Girgentana, Garganica, Sarda, Alpine, Montefalcone and Saanen. The Montefalcone goat showed the highest frequency of the mutation, confirming one more the peculiarity of this breed.

Keywords

• β-lactoglobulin, Goat, Promoter region, Genetic polymorphism