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Kappa-casein and diacylglycerol O-acyltransferase gene polymorphism in black-and-white cattle

Submitted by red on Mon, 27/04/2020 - 09:48

Polymorphism has been studied and occurrence frequency of genotypes and alleles by genes of kappa-casein and diacylglycerol O-acyltransferase in first-calf heifers and highly productive black-and-white cows of different genealogical lines has been determined. The highest frequency of CSN3 AB genotype (34.7% and 38.9%) and CSN3 BB genotype (10.2 and 5.6%) has been registered in the first-calf heifers of M. Chiftein and R. Sowering line at the B allele frequency of CSN3 gene – 0.28 and 0.25.

Milk protein composition and its technological properties at Saanen goat’s breed depending on their genotype by beta-lactoglobulin level

Submitted by red on Wed, 27/12/2017 - 12:57

The research has been carried out in Vysokogorsk district of the Tatarstan Republic where the protein composition of milk from 80 Saanen goat’s breed by electrophoresis in polyacrylamide gel have been studied. It has been found that goat’s and cow’s milk has the similar protein composition. Interspecies differences are more strongly observed in the concentration of individual fractions. It has been found the studied animals in locus β-Lg have two genetic variants: among AA and BB the prevailing one is genotype AA.

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