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Manuscript was received/ 08.10.2025
Received after review/ 22.10.2025
Accepted for printing/ 5.11.2025
Available online/ 30.12.2025
Abstract
Objective. To study the growth and development of purebred repair young pigs of Danish selection
in domestic conditions. Methods. The research was conducted at the Veda Podillia LLC in the Ternopil
region. Four groups of animals were formed: I – purebred gilts of the Large White breed, II – crossbred
young pigs from a combination of the Large White and Landrace breeds, III – purebred gilts of Landrace
breed, IV – crossbred young pigs from a combination of Landrace and the Large White breeds. Based on
the results of rearing gilts, they were evaluated using the Berezovsky and Tyler indices, growth intensity (Δt),
growth stress index (In), growth uniformity index (Ir), and modified index (Im), and the index of the ratio of
body length to live weight (IDV). The research results were processed using the method of variational
statistics. Results. Differences in the growth efficiency of repair gilts were noted between different groups
of animals from birth – at the level of 18.99% between the most contrasting groups (p<0.001). Gilts from the
combination of Landrace sows and the Large White boars showed significantly higher average daily gains
compared to purebred the Large White pigs (p<0.001) and pigs obtained from the combination of the Large
White sows and Landrace boars (p<0.01). Lower values of backfat thickness at the level of the 6th-7th
thoracic vertebrae when reaching a live weight of 100 kg were observed in purebred Landrace repair gilts
and crossbred gilts from the combination of Landrace sows with the Large White boars (p<0.001 and p<0.01,
respectively). At a live weight of 140 kg, lower values of backfat thickness were observed in crossbred gilts
from the combination of Landrace sows with the Large White boars (p<0.001) and crossbred pigs from the
combination of Large White sows with Landrace boars (p<0.05). In terms of body length, both at a live weight
of 100 kg and 140 kg, purebred Landrace sows were longer (p<0.001). For most of the evaluated indices
(Δt, In, Im), no differences between the groups were found. According to the uniformity index (Ir), the
purebred Large White repair gilts had values that were 2.98-4.17% lower. The assessment according to the
Berezovsky and Tyler indices revealed differences between the groups, where Landrace sows and the
purebred Large White repair gilts were used as the maternal form. According to the IDV100 and IDV140
indices, the difference between the most contrasting groups of repair gilts was 3.62% and 4.91%,
respectively. Conclusions. Based on the results of studies on the rearing of Danish-bred repair young pigs
in domestic conditions, it was found that the evaluated young pigs corresponds to the elite class according
to the instructions for the bonitation of pigs. At the same time, reliable interbreed differences in growth
efficiency and, accordingly, average daily gains, as well as exterior characteristics – fat thickness and body
length – were identified, which is confirmed by the calculation of the Berezovsky, Taylor, and IDV indices.
Keywords: growth, development, the Large White breed, Landrace, repair young pigs, live weight,
indices.
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