THE CHARACTERISTIC OF QUALITATIVE POLYMORPHISM OF ANIMALS' MILK PROTEINS
Abstract
The article is devoted to the study of Polymorphism – the phenomenon widespread in the nature also covers various signs, including biochemical systems of an organism. It, being shown in any population in several phenotypic sign conditions, is caused by plural alleles and a certain locus.
The first works on polymorphism of milk proteins' concern 1955-1957, when R.Ashaffenburg and I.Druri the first have found out presence of A and B forms of beta-lactoglobulin.
Defining types beta-lactoglobulin at certain cows during one, two and three lactations, and also character of inheritance of their forms, authors have come to conclusion, that synthesis beta-lactoglobulins is genetically caused. As a result of studying of the proteins which synthesis is supervised by this locus it is established, that it is determined by two autosomal codominant allele genes and A, B which are defined at the animal surveyed breeds. Thus at animals of the majority of breeds allel B exceeds on concentration allel A. Hence, the use in breeding of identified genotypes will contribute to the improvement of productive and breeding qualities of animals. Two of the established genotypes of beta-casein AA and АВ0 92.26% of cases found beta beta - casein AA.
About the Authors
M. EskaraKazakhstan
A. Dauylbai
Kazakhstan
Sh. Yelemanova
Kazakhstan
D. Kudasova
Kazakhstan
References
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Review
For citations:
Eskara M., Dauylbai A., Yelemanova Sh., Kudasova D. THE CHARACTERISTIC OF QUALITATIVE POLYMORPHISM OF ANIMALS' MILK PROTEINS. Bulletin of Shakarim University. Technical Sciences. 2020;(3(91)):195-198. (In Russ.)