One of the main goals and objectives of breeders in modern sheep breeding is the preservation and improvement of the genetic potential of animals. In this regard, the determination of erythrocyte antigens will help to identify errors in accounting for origin, determine the economic and useful qualities of animals in the early stages, as well as evaluate breeding sheep based on the quality of their offspring, and select the best compatibility of parental pairs. The results of the study showed that allelic polymorphism of blood group factors indicates both similarities and differences. The maximum number of variants of parental pairs was in the range of 0.31-0.60 and amounted to: parents — 118 pairs (79%), and when selecting parental pairs with this index, lambs with the highest live weight can be obtained. . Indicators of the economic efficiency of raising lambs, pairs of rams and mats, obtained from different selections, show that the greatest profit for the farm was brought by animals with an IAS of 0.31-0.60.

Analysis of these results from PCR-RFLP of Kalmyk breed bulls at the GH and Tg5 locus in breeding breeders of the Republic of Kalmykia determined the following: for the GH gene, out of 86 samples, 44% were carriers of the homozygous VV genotype, 26% of animals became carriers of the heterozygous LV genotype, and with the homozygous genotype LL they numbered 30%. For the Tg5 gene, out of 80 samples, 31% are carriers of the homozygous TT genotype, 48% of animals were carriers of the heterozygous TG genotype, 21% of animals were carriers of the homozygous GG genotype. The percentage of desirable genotypes associated with economically valuable productivity indicators — VV and TT, do not differ significantly (44% and 31%, respectively) among themselves and are at an average level. This can be explained by targeted selection and breeding work in the studied herds.

In animal husbandry practice, hormonal substances are increasingly used to regulate the reproduction processes of farm animals. Reproduction biotechnology includes all activities carried out for the purpose of a systematic and controlled process of reproduction of economically useful animals. Such measures include, for example, the whole range of measures for artificial insemination, special hormonal treatment regimes, or a special change of light and darkness, which makes it possible to induce heat cycles in sheep even during the anestrous period. Directed regulation of the reproductive functions of animals is based on the ability of sex and gonadotropic hormones to cause early puberty, superovulation, stimulation and inhibition of estrus.

The microbiome is an amazing ecosystem of microorganisms that inhabit the bodies of various living creatures. Each species has its own unique microbiome, specific to its physiology and lifestyle. This article provides an overview of the most important functions of the canine and feline microbiome and examines the impact on their health and overall well-being.

The dynamics of diagnostic studies of productive and unproductive livestock for particularly dangerous infections carried out by specialists of the Iki-Burul district Station for Combating Animal Diseases in 2020-2022 is presented. It has been established that the diagnostic studies of animals conducted by veterinary specialists in the territory controlled by the Iki-Burul RSBBW have been completed or exceed the planned indicators.

The evaluation of the quality of cooked sausages with the use of “Iodocasein” in comparison with sausage products of the classical recipe was carried out. During the research, it was found that all samples of boiled sausage products meet the requirements of the standard.

Early ripening, drought-resistant, perennial and relatively cold-resistant hybrids and varieties of sorghum of all types are capable of providing a sufficient amount of highly nutritious and highly balanced feed.

Experimental studies on biostimulants for vegetable crops have shown that the drugs have a positive effect on increasing the intensity of photosynthesis and respiration in the plant. It was established that the use of biological products provided an increase in tomato yield relative to the control: Bakflor-T was 3.53 kg/m², Narcissus-N was 1.57 kg/m², Agat-25K was 2.41 kg/m². A positive effect of biological products on the quality of the resulting vegetable products was revealed: the content of vitamin C in tomato fruits increased to 5.21-6.01 mg% relative to 4.02 mg% in the control.