ADAPTIVE CAPACITY OF STUD RAMS OF ASKANIAN MEAT AND WOOL BREED AND PARAMETERS OF SELECTION OF ZAKARPATTJA-TYPE PRECOCE BREED EWES FOR INTER-BREEDING

  • I. V. Goncharenko National University of Life and Environmental Sciences of Ukraine 15, Heroyiv Oborony str., Kyiv, 03041, Ukraine
  • V. M. Agiy Zakarpattja State Agricultural Research Station, 17, Svobody Avenue, 17, Velyka Bakhta, Beregovo district, Zakarpattja region, 90252, Ukraine
  • R. G. Filep Zakarpattja State Agricultural Research Station, 17, Svobody Avenue, 17, Velyka Bakhta, Beregovo district, Zakarpattja region, 90252, Ukraine
  • T. M. Durdinets Separated Sub-division of NUBE of Ukraine "Mukachevo Аgrarian Сollege", 32, Masarуka Tomasha str., Mukachevo, Zakarpattja area, 89600, Ukraine
Keywords: ASKANI RAMS, EWES, PREKOCE, HETEROSIS, GENOTYPE, ACCLIMATIZATION, PRODUCTIVITY.

Abstract

The rams of the Askanian meat-wool breed, grown and kept in the conditions of the steppe zone of the south of Ukraine, were investigated for their adaptive capacity and adaptation to the conditions of the lowland regions of Zakarpattja.

It was found that the physiological response of the rams to the maximum air temperature was characterized by a slight increase in body temperature and pulse, and a significant increase in respiratory rate per 1 minute. The good adaptive properties of the Askanian meat and wool breed rams are indicated by the high breeding capacity of ewes, at 97%, in both farms. The ewes of the breed prekos with a live weight of 55.9–58.9 kg were involved in the breeding process, and the Askanian rams with a live weight of 93.3–95.1 kg. It was studied the influence of crossbred crossing of crossbred Askanian sheep of meat and wool breed on the development of productive and reproductive features of Zakarpattja sheep ewes of the breed prekos with the purpose of obtaining mixed breeds with improved economic performance. It is proven by theory and practice that one of the main criteria for the rational management of sheep breeding in modern conditions is the study of individual features of growth and development of young sheep. In a market economy, increasing the meat productivity of sheep is an important factor that determines the level of economic efficiency of the industry. Obtained progeny at the age of 4–8 months had a higher intensity of growth. Thus, the average daily weight gain of lambs in the control group was 234 g, and experimental — 265 g, which is 11.3% more than in the control. The average daily weight gain of the bright control group was 205 g, and the experimental one — 244 g, which is 11.9% more than in the control group. At the age of 8 months, the fat mass of slaughtered animals ranged from 32–36 kg and the carcass weight was 15–18 kg with good fat irrigation.

The classification of sheep carcasses by fat irrigation according to the EUROP system corresponded to the average level of coverage of carcasses with fat, that is, the whole carcass was covered with a thin layer of fat, at the base of the tail — small accumulations of fat, the kidneys partially or completely covered with a thin layer of fat, with a slight fatty water between visible intercostal muscles .The balanced feeding of experimental animals had a positive effect on the increase in live birth weight and their viability. The minimum selection parameters of breeding sheep ewes, which are involved in the breeding process, are also set for obtaining animals with high multi-farrowing and combined productivity.

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Published
2020-06-01
How to Cite
Goncharenko, I. V., Agiy, V. M., Filep, R. G., & Durdinets, T. M. (2020). ADAPTIVE CAPACITY OF STUD RAMS OF ASKANIAN MEAT AND WOOL BREED AND PARAMETERS OF SELECTION OF ZAKARPATTJA-TYPE PRECOCE BREED EWES FOR INTER-BREEDING. Scientific and Technical Bulletin оf State Scientific Research Control Institute of Veterinary Medical Products and Fodder Additives аnd Institute of Animal Biology, 21(1), 52-59. https://doi.org/10.36359/scivp.2020-21-1.05