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Khalak V.I., Candidate of Agricultural Sciences, Senior Researcher,
https://orcid.org/0000-0002-4384-6394
 State Institution "Institute of Grain Crops of NAAS of Ukraine"
Guty B.V., Doctor of Veterinary Medicine. Sci., Professor,
https://orcid.org/0000-0002-5971-8776
Lviv National University of Veterinary Medicine and of Biotechnology named after S.Z. Gzhytsky, Lviv, Ukraine
Bordun O.M., Candidate of Agricultural Sciences, Senior Researcher,
https://orcid.org/0000-0001-6144-771X
Institute of Agriculture of the North-East of NAAS of Ukraine

 

DOI https://doi.org/10.32900/2312-8402-2021-126-153-162

Keywords: young pigs, breed, fattening and meat qualities, index, economic efficiency, variability, correlation

Abstract

The results of research of fattening and meat qualities of young pigs of Large White breed of different interbreeding differentiation on some integrated indicators are presented, the level of correlations between traits and economic efficiency of research results is calculated.
The experimental part of the work was performed in the agricultural formations of the Dnipropetrovsk region and the laboratory of animal husbandry of the State Institution "Institute of Grain Crops of NAAS of Ukraine. Evaluation of young pigs for fattening and meat qualities was carried out taking into account the following indicators: average daily gain of live weight during control fattening, kg, age of live weight 100 kg, days, fat thickness at 6-7 thoracic vertebrae, mm, length of chilled carcasses, sm (Berezovsky, Khatko, 2005).
Complex evaluation of young pigs for fattening and meat qualities was performed according to the SI4 selection index (Bazhov, Komlatsky, 1989) and the Sazer-Fredin index (quoted in Kozlovsky, 1982). Economic efficiency of research results (Method of determining economic efficiency…, 1983) and biometric processing of the obtained data (Lakin, 1990) were carried out according to generally accepted methods.
It was found that young pigs of Large White breed of the controlled population at the age of 100 kg exceed the minimum requirements of the elite class by 6.31%, the thickness of the fat at the level of 6-7 thoracic vertebrae - 32.25% and the length of the chilled carcass - 3.92 %. A significant difference between animals of different interbreed differentiation according to the selection index SI4 (groups I and III) was established by the average daily gain of live weight during the control fattening period (91.7 g; td = 9.28; P <0.001), age of 100 kg live weight (7.3 days; td = 4.42; P <0.001), fat thickness at the level of 6-7 thoracic vertebrae (3.4 mm; td = 6.07; P <0.001), the length of the cooled carcass (1.7 cm; td = 3.54; P <0.01), the length of the bacon half of the cooled carcass (2.7 cm; td = 3.64; P <0.01). Taking into account the interbreed differentiation according to the Sazer-Fredin index, it was found that young pigs of group II outperformed peers of I on average daily live weight gain for the period of control fattening by 4.03%, age of 100 kg - 3.67% and length of the chilled carcass - 0.2%.
The pairwise correlation coefficient between fattening and meat qualities of young pigs and evaluation indices ranges from -0.760 (tr = 12.86) to +0.748 (tr = 12.14). The maximum increase in additional products was obtained from young pigs of the I experimental group according to the selection index SI4 (+4.88%) and the second experimental group according to the Sazer-Fredin index (+1.12%), and its value is +240.54 and +55.42 UAN/head respectively.

References

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