The relationship between the main Sheep breeding traits of the Russian meat merino and Soviet merino breeding

   Relevance. Breeding work in animal husbandry can be successful if in result animals with high rates of productivity, required from them economically useful features (EUF), are obtained. Obviously, it is necessary to analyze several EUFs for qualitative assessment of animals. Recently, the knowledge of the regularities of individual development of the organism and their interrelation has become more and more important, it's research is an urgent task. The study of these regularities or combinations between individual phenotypic traits will serve as the basis for the development of a better system of breeding work in sheep breeding.
   Methodology. The studies were carried out in the Collective stud farm named after Lenin, Stavropol Territory. The object of the research were breeding records of primary zootechnical registers for the last 5 years on elite and first-class animals of fine-wool sheep breeds – Russian meat merino and Soviet merino; their live weight, quantitative and qualitative indicators of wool productivity of different sex and age groups were studied.
   Results. In our researches it was established that the connection between the length of wool and the trimming both on the group of adult ewes and on the yearlings of Russian meat merino sheep was relatively big – from r = + 0.425 to r = + 0.594 and of the Soviet merino – from r = + 0.280 to r = + 0.592 with high reliability of sampling correlation coefficients in both cases (P < 0,01 and P < 0,001); the correlation of wool cutting in physical weight with indicators of pure fiber turned out to be high – equal to + 0,766 in sheeps of Russian meat merino breed. 

1. Berdalieva A. M., Saparova J. I., Isaeva A. A. et al. Correlation variability of breeding traits karakul sheep in the Aral Sea region. International Journal of Applied and Fundamental Research. 2015; 1 (1): 82–83. (in Russian)

2. Glembotsky Y. L. Dependence of the value of the hair cut on the live weight of lambs at the age of 4–5 months. Sheep breeding. 1980; 7: 27–28. (in Russian)

3. Zavgorodnyaya G. V., Dmitrik I. I., Sidortsov V. I. et al. Method of complex evaluation of runes of pedigree sheep of fine-fleeced breeds. Scientific and methodological guidelines of the State Scientific Institution Stavropol Research Institute of Animal Husbandry and Forage Production. Stavropol. 2013; 39. (in Russian)

4. Zavgorodnyaya G. V., Dmitrik I. I., Pavlova M. I. et al. Basic properties of wool of foreign selection. Agricultural Journal. 2021; 3 (14): 70–77. (in Russian)

5. Katkov K. A., Skorykh L. N., Efimova N. I. et al. Using a comprehensive indicator of productivity to assess the genetic potential of sheep of different genotypes. Bulletin of Agrarian Science. 2021. 5 (92): 49–58. (in Russian)

6. Pavlov M. B. Wool Productivity of Soviet Merino sheep in JSC "Sarpa". In the collection: Priority and innovative technologies in animal husbandry – the basis for modernization of agro-industrial complex of Russia. Collection of scientific articles on the materials of the International scientific-practical conference of researchers and teachers. 2019; 209–212. (in Russian)

7. Order and conditions of appraisal of fine-wool sheep breeds, semifine- wooled breeds and breeds of meat direction of productivity. M. «Rosinformagrotech». 2013; 55. (in Russian)

8. Skorykh L. N., Safonova N. S., Omarov A. A. Breeding and genetic methods of increasing and predicting the productivity of fine-wool sheep. In the collection: Food technology for the future, innovations in the production and processing of agricultural products. Collected Articles of the International Scientific and Practical Conference. 2020; 249–252. (in Russian)

9. Trukhachev V. I., Chernobay E. N., Ponomarenko O. V. Correlation and heritability of sheep. In the collection: Innovative technologies in agriculture, veterinary medicine and food industry. Proceedings of the 83rd International Scientific and Practical Conference. 2018; 284–288. (in Russian)

10. Shumaenko S. N. Effectiveness of linear breeding in the farms of the original breed Russian meat merino. Agricultural Journal. 2020; 2 (13): 59–65. (in Russian)

11. Chernobay E. N., Antonenko T. I. Relationship of the main economic and useful features in fine-wool sheep and their heritability. In the collection: Modern aspects of veterinary and zootechnics. Creative heritage of V.K. Birikh (to 115-th anniversary since his birth). Materials of the All-Russian scientific-practical conference. Federal State Budgetary Educational Institution of Higher Education "Perm State Agrarian and Technological University named after Academician D. N. Pryanishnikov". 2018; 84–88. (in Russian)

12. Chernobay E. N., Antonenko T. I. et al. Phenotypic correlations and heritability of traits by purebred and crossbred youngsters with different blood status on Australian beef merino. Bulletin of Kursk State Agricultural Academy. 2018; 7: 104–109. (in Russian)