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Sheep, goats, wool business

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No 2 (2022)
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IN THE ISSUE OF THE JOURNAL

3-4 48
Abstract

The article briefly describes the history of the development, first of all, of fi ne-wool sheep breeding in Russia and the contribution of VNIIOK scientists to this, of great national importance.

BREEDING, SELECTION, GENETICS

5-7 26
Abstract

The article discusses the use of correlation analysis with the calculation of Pearson correlation coefficients. Calculations were carried out using biometric software. The presented material provides general information on the assessment of the degree of closeness of the relationship between the fatty acid spectrum of blood lipids, live weight and average daily growth of Stavropol breed lambs of different genotypes. 

8-14 53
Abstract

The article discusses the most common ART (artifi cial insemination, cryopreservation of sperm and creation of storage facilities, induction and synchronization of sexual reproduction), as well as ART used in rare cases (technology of superovulation induction and embryo transfer, in-vitro embryo production, embryo cryopreservation, transgenesis). The author presents the results of own long-term research on the development of biotechnological methods and methods of increasing the reproductive qualities of sheep and goats. The reasons for the rare use of multiple ovulation and embryotransplantation programs (MOET) in domestic sheep and goat breeding practice are given. Recommendations on using MOET to preserve the gene pool and to increase the effi ciency of using genetic resources of high-value animals, increasing their participation in the sheep and goat reproduction process, are given. 

15-17 25
Abstract

Studies aimed at fi nding associations between polymorphic variants of the growth hormone gene and quantitative and qualitative characteristics of meat in Soviet merino sheep have been carried out. Based on the conducted genetic analysis by PCR and Sanger sequencing, a replacement of a single nucleotide (SNP) in the DNA sequence of the GH gene was detected, which aff ects meat productivity. 

17-22 59
Abstract

The article describes the results of a study of phenotype indicators using a complex productivity indicator (KPi) of sheep of the Karachay breed. For its formation, a principal component analysis was preliminarily performed. The studies were carried out on one-year-old rams of the Karachay breed (n=50). The calculations were carried out using the integrated mathematical package MATLAB. As a result of the analysis, 7 principal components (PC) were calculated, characterizing 82.5% of the variance, in which the greatest contribution was made by indicators determined using ultrasound: the thickness of the femoral muscle and the width of the muscular eye. The numerical values of the complex index of productivity made it possible to rank the animals into two groups: “MED” and “MAX”. No animals were found in the “MIN” group. The presented algorithm for the formation of a complex indicator of the productivity of sheep of the Karachay breed makes it possible to evaluate simultaneously for several phenotypic traits and can be used to prepare data for mathematical analysis and a genome-wide search for associations to identify genes that form the productive qualities of sheep. 

22-25 36
Abstract

The article presents the results of genotyping of sheep of the Manych Merino breed. Using PCR-RFLP analysis, the specifi city of the allelic spectrum of the GH and GDF9 genes, which regulate growth processes and aff ect meat productivity, was established, expressed in diff erent frequencies of alleles and genotypes. 

25-27 27
Abstract

The article presents data on the productive indicators of sheep of the Manych merino breed and crossbreeds with the blood of rams of the Australian meat merino breed. 

28-32 27
Abstract

The article presents data on the effectiveness of crossing ewes of the Stavropol breed with crossbred rams (½ Kalmyk fat-tailed + ½ Dorper) for the production of lamb meat. It has been established that crossbred young rams with pedigree ½ Stavropol + ¼ Kalmyk fat-tailed + ¼ Dorper have increased growth energy and are highly superior to purebred herd mates of the Stavropol breed in live weight during growing and fattening periods, as well as in slaughter and carcass traits. 

32-35 40
Abstract

The article describes the feeding grounds of the North Caucasus depending on the vertical zonality. Attention is paid to the native rough-haired sheep breeds of the North Caucasus, which are well adapted to extreme mountain conditions and most effectively use inaccessible mountain pastures. 

35-37 35
Abstract

The article presents data on the weight and linear growth of crossbreeds obtained by crossing local dairy goats with Boer goats bred in the Astrakhan region. 

SHEEP AND GOAT PRODUCTS

38-41 22
Abstract

The use of compound feeds in the diets of young sheep with a whole milk substitute (ZCM) and an Organic feed additive in an amount of 5.0 and 3.0% by weight compared to standard compound feed contributed to an increase in raw and digestible protein by 8.3-11.1 and 7.5-11.3%, lysine – by 1.4-2.9%, methionine with cystine – by 2.0-4.1%.

Experimental data have established that the highest coeffi - cient of meat content in lambs at 4 months of age was obtained in experimental groups receiving ZCM and feed additive “Organic” – 3.44-3.57 compared with the control – 3.07. Animals of experimental groups compared with the control in muscle tissue contained less moisture, but more dry matter, fat, squirrel. 

ШЕРСТЯНОЕ ДЕЛО

41-46 35
Abstract

The article presents the dynamics of the main properties of the wool of sheep producers of breeds Stavropol (CT), Manych merino (MM), Dzhalginsky merino (DM) over the past 4-5 years. 

46-49 47
Abstract

The article presents the data of an instrumental assessment of quantitative and qualitative indicators of the wool of young meat breeds of sheep of foreign breeding (Zwartbles, Charolais, Ile de France, Swifter, Texel, Poll Dorset) imported to the Stavropol Territory for use in the breeding process in domestic sheep breeding. breeds of sheep. 

FEED, FEEDING, FEED PRODUCTION

49-53 30
Abstract

The results of the use of starter feeds enriched with 5.0% whole milk substitute (WMS) and 3% feed additive “Organic” in the diets of young sheep are presented.

Enrichment of starter feeds with 5% WMS and 3% feed additive “Organic” significantly increased the live weight of young sheep during the fattening period from 2 to 4 months of age and all indicators of the slaughter of lambs at the age of 4 months compared to the control. 

53-57 32
Abstract

The observance of haymaking pasture turnover and the use of paddock grazing allows to preserve the productivity of improved and old–sown forage lands, and the developed modes of their use in the hay-pasture system ensure continuous grazing of animals and obtaining high-quality hay. 

57-59 43
Abstract

The article presents the materials of natural forage lands of the arid zone of the Stavropol Territory in the herbage of which there are harmful plant species: cornflower, hairlike grass, roofing bonfire, small alfalfa, etc. Livestock breeders are recommended to exclude grazing of animals on the grass stands containing harmful plant species. 

IMPROVING LABOR PRODUCTIVITY

60-63 28
Abstract

The article presents data on a rotary machine for artificial insemination of sheep with the function of fi xing the head and, separately, the back of the trunk. The machine eliminates the need for capital structures and premises for artificial insemination of sheep, thereby reducing material costs when working with animals. The versatility of the design indicates its versatility, in addition, it is convenient to store and transport, and also helps to reduce the cost of manual labor by more than 2 times.

Artificial insemination and other veterinary measures with the use of this machine become more efficient, more convenient and less traumatic. In addition, it reduces the use of human resources from 25% to 60%. 

64-67 36
Abstract

The article considers a designed, manufactured and tested collapsible cage under production conditions – the result of the work of the employees of the North Caucasian FNAC, which is reflected in the utility model patent No. 207255.

The improved collapsible cage is designed for fixing sheep during zootechnical and veterinary measures: weighing, bonitirovka, blood collection, veterinary treatments, etc.

Its use in the technological process ensures a reduction in manual labor and an increase in labor productivity.

CONGRATULATIONS TO THE ANNIVERSARIES



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ISSN 2074-0840 (Print)