BEST LINEAR UNBIASED PREDICTION INDEX: SELECTION CRITERIA
AND ECONOMIC EVALUATION OF THE USE OF SOWS OF DIFFERENT
BREEDING VALUE
Authors: Khalak Viktor , Tsereniuk Oleksandr , Gryshina Lyudmila , Ilchenko Maria , Bordun Oleksandr , Smyslov Serhii 
Published: December 2023

Purpose. To study indexes of own productivity of repair pigs and reproductive
qualities of sows of different intrabreed differentiation according to the BLUP index,
as well as to determine criteria for selecting highly productive animals for further use
in the controlled population. Methods. Zootechnical, statistical, purebred breeding.
The object of the study were repair pigs and sows of the Large White breed. The
breeding value of animals of the specified production group was determined by the
BLUP index, evaluation of young pigs according to their own productivity indexes,
sows - according to reproductive qualities, was carried out taking into account the
following characteristics: age of reaching live weight of 100 kg, days; fat thickness at
the level of the 6th-7th thoracic vertebra, mm; the thickness of the fat in the middle
point of the back between the withers and the sacrum, mm; thickness of lard on
sacrum, mm; body length, cm; multifertility, head; milk yield, kg, number of piglets at
the time of weaning, head; weight of the nest at the time of weaning at the age of 28
days, kg, preservation, %. Comprehensive evaluation of sows was carried out
according to the index of M. D. Berezovskyi (cited by Vashchenko, 2019), the
alignment of the sow's litter according to the live weight of piglets at the time of their birth - according to the method of V. I. Khalak (2012). Biometric processing of the
research results was carried out according to generally accepted methods
(V. P. Kovalenko et al, 2010). Results. Based on the results of the research, it was
determined that repair pigs of the Large White breed, based on their own productivity
(age of reaching 100 kg live weight, days; lard thickness at the level of 6-7 thoracic
vertebrae, mm) belong to the elite class. The maximum indexes of multifertility
(12.8+0.21 head), milk yield (62.8+1.46 kg), the number of piglets at the time of
weaning (10.9+0.20 head) and litter weight at the time of weaning at the age of
28 days (85.6+1.54 kg) are characterized by sows of the I experimental group
(BLUP index = 109.78-123.14); the index of M. D. Berezovskyi is 41.86+0.593
points. The coefficient of variation (Сv, %) of the reproductive qualities of sows of the
Large White breed of different breeding value, evaluated according to the BLUP
index (maternal line) ranges from 4.79 to 18.59 %. Conclusions. Coefficient of
pairwise correlation (r) between indexes of reproductive qualities, BLUP index
(maternal line) and index of M. D. Berezovskyi varies from -0.292 (tr=3.72) to
+ 0.978 (tr=262.05); the relationship between the specified mathematical models and
the signs of own productivity is weak and unreliable (r= -0.050 - +0.007). The use of
sows of high breeding value (BLUP index = 109.78-123.14) provides additional
production at the level o f+13.20 %, and its value is +431.77 UAH./head/farrowing.
Key words: sow, breed, own productivity, reproductive qualities, BLUP index,
breeding value, variability, correlation.