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Молочнохозяйственный вестник, №1 (29), I кв. 2018

164

РЕФЕРАТЫ

индексу резистентности в 1,31 раза. Отбор ремонтных свинок по новым индексам

резистентности имел положительный результат.

Summary

In 2015, two groups of animals have been formed in the Oktyabr’skiy district, the

Rostov region. The first group has consisted of 12 two-year old sows of a large white

breed. The second group has been presented by their offsprings. The reproductive

qualities of sows have been studied. A complex assessment of the natural resistance

level has been carried out and individual resistance indices have been determined. The

interconnection between resistance factors and their relationship to productivity have

been studied by correlation analysis. The studies have shown a relationship between

the reproductive qualities and the natural resistance of sows: in the first days after

farrowing, the nest weight has been greater in low-resistant sows, but by the time of

weaning, the number and weight of piglets have been higher in highly resistant sows.

Multifetation affects the resistance of the sow negatively. High productivity causes the

decrease in resistance. By the end of the suckling period, there is a direct relationship

between the sows’ resistance indices and the live weight of piglets they feed. The

correlation coefficients between the resistance index and the nest weight change from

negative values ​to positive ones. To validate the possibility of selecting pigs according

to the resistance indices and evaluating its effectiveness, resistance indices have been

determined for the same animals at different ages. Of the 12 gilts of a large white

breed, the six ones have been included in the highly resistant group and the other six

gilts - in the low-resistant group. The groups have been formed at the age of 30 days.

According to the resistance index, the advantage of the highly resistant group has been

by 1.24 times over the low-resistance group at this age. By the age of two years old,

the animals of the first group also exceeded by 1.31 times the low-resistance group

according to the resistance index. Selecting replacement gilts by new resistance indices

has had a positive result.

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