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1. Polymorphism of GH/HaeIII and GDF9/AsplEI genes, genetic variation and association of their genotypes with immune status in sheep of different breeds ranched in different natural and geographic areas

Author

A. A. Ozdemirov, A. I. Surov, E. S. Surzhikova, A. A. Khozhokov, Z. K. Gadzhiev, D. D. Evlagina, E. M. Alieva, and R. A. Akaeva

Subjects
adaptation, population, sheep, genetic variability, immune status, breeding conditions, Ecology, QH540-549.5
Abstract

Aim. One of the important tasks in solving the problem of improving the efficiency of sheep breeding is the rational use of fodder lands in the North Caucasus and the South of Russia, a significant part of which is located in different natural and climatic conditions. The complexity of solutions lies in insufficient knowledge of the mechanisms of adaptation of farm animals, in particular sheep, to the ecological and geographical features of these regions. The purpose of this research was to study the genetic polymorphism of genes, the degree of genetic variability and immune status in sheep of different breeds, since genetic polymorphism is a measure of its adaptability and the hematopoietic function of blood is the basis of the life of the organism.Material and Methods. The genetic structure of the GH/Hae III, GDF9/AsplEI genes and immune status, was studied by the methods of genetic‐statistical and immune analysis in sheep of different breeds kept in different climatic zones of Dagestan and the Krasnodar Territory.Results. As a result of DNA genotyping of the studied samples of sheep of different breeds, it was found that polymorphism of GH/HaeIII, GDF9/AsplEI genes is represented by three genotype variants: homozygous GH/HaeIIIАА, GH/HaeIIIВВ; GDF9/AsplEIАА, GDF9/AsplEIGG; heterozygous GH/HaeIIIAB; GDF9/AsplEIAG and two alleles: A and B – of the GH/HaeIII gene; A and G – GDF9/AsplEI gene with different frequency of occurrence, respectively.Conclusion. For the first time, genetic variability has been studied in the context of the immune status of sheep populations of different breeds bred in the foothills of the Republic of Dagestan and Krasnodar Territory. The information obtained about the role of the degree of genetic variability and the immune status of sheep of different breeds is answered in the formation of adaptive‐compensatory mechanisms to specific conditions of the breeding environment. A deeper study of the adaptive characteristics of sheep of different breeds for their further improvement allows the use of molecular genetic and hematological methods.

Published
2022
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2. AN AREA-SPECIFIC BREED OF SHEEPS OF DAGESTAN

Author

М. А. Daveteeva, P. O. Alieva, R. А. Akaeva, Z. M. Guseynova, Е. M. Alieva, S. K. Gamzatova, and А. А. Ozdemirov

Subjects
Veterinary medicine, Biology, Breed
Abstract

In the Dagestan Republic, sheep breeding has been assigned one of the leading roles in the livestock system for a long time. The vast territory of high-mountainous, alpine pastures, influenced by the nature of agriculture in the republic. The main feature of sheep breeding in Dagestan is distant pasture cattle breeding. In early spring, to summer high-altitude pastures, and in autumn to winter, desert and semi-desert pastures of the Caspian lowland, up to 75 percent of sheep are herded annually. The livestock is on the way for more than two months, roaming from summer pastures to winter ones and back. Meat and wool sheep farming is intensive and very profitable. Live weight of young animals while ensuring good fattening-off at the age of 6 months reaches 40 kg, and can be realized. These meat has a fine texture and is easily digestible. Sheep of the meat and wool types are register for large growth, good meat forms, as well as significant early maturity, high-quality meat in large quantities and good quality crossbred wool. The article presents a brief history of breeding sheep of meat and wool types. The preliminary studies carried out made it possible to determine the Gunib breed as the initial breed, as the most optimal, showing the best results. The Württemberg breed of sheep was chosen as the improver breed.

Published
1970
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