Reproductive qualities of sows of the large white breed of French breeding and their evaluation according to some breeding indices

The article presents the results of a study on the evaluation of sows by reproductive qualities using the selection index of reproductive qualities of the sow (SIRQS) and the index of Shatalina Yu. D. The experimental part of the work was carried out at Agroprime Holding LLC of the Odesa region and the laboratory of innovative technologies and experimental livestock facilities Institute of Pig Breeding and AIP of the National Academy of Sciences. Evaluation of sows for reproductive qualities was carried out considering the following signs: multifertility, head.; high fertility, kg.; nest weight at the time of weaning at 28 days, kg; preservation, %. A comprehensive assessment of sows for reproductive qualities was carried out using the selection index of reproductive qualities of the sow (SIRQS)and the Shatalina index. Biometric processing of research results was carried out according to generally accepted methods. The intrabreed differentiation of sows according to the selection index of the reproductive qualities of the sow (SIRQS) and the Shatalina index shows that a significant difference between the animals of the I and III experimental groups was found in terms of multifertility (4.3 and 4.4 head) and litter weight at the time of weaning at the age of 28 days (33.0 and 34.1 kg). There was no significant difference between the groups of experimental animals in terms of high fertility and survival of piglets until weaning at the age of 28 days. High coefficients of phenotypic consolidation in sows of the 1st and 2nd experimental groups were established by multifertility and litter weight at the time of weaning at 28 days. The number of reliable pairwise correlation coefficients between the absolute indicators of reproductive qualities of sows, the Shatalina index, and SIRQS is 75.0 %. The maximum increase in additional production was obtained from sows of the 1st experimental group of interbreed differentiation according to the index of Shatalina (+13.68 %) and SIRQS (+13.85 %), and its value is +697.34 and +706.01 UAH/head./farrowing, respectively.