Influence of heat stress on the reproduction rates of sows of the Poltava meat breed, depending on the genotype

Natal`Ya Garskaya,Sergey Pozyabin,Lidiya Peretyatko,Anatoliy Tresnitskiy,Sergey Tresnitskiy,O.Y Patlasov

doi:10.1051/bioconf/20224201026

Abstract

The article deals with the issues of the influence of heat stress that occurs in the summer on the indicators characterizing the reproductive qualities. Purebred sows of tested Poltava meat breed of different genotypes were investigated: Group I - individuals-offspring obtained by the method of introductory crossing using the blood of early maturing meat breed (blood content 12.5 %), Group II - individuals obtained by the method of introductory crossing using the blood of the Finnish Landrace (blood content of 12.5 %). It was found that in sows of the Poltava meat breed with the blood of early maturing meat breed, the number of live piglets at birth significantly exceeds the indices of sows with the blood of the Finnish Landrace by 8.27 % at p≤0.05. According to the analysis of Cv, these natural and technological conditions had the greatest influence on the duration of the service period in sows of Group I. Wherein, the least influence of these natural and technological conditions was found for the indicator of the duration of pregnancy. Animals with the blood of an early maturing meat breed were more adaptable to these natural and technological conditions.

Highlights

According to forecasts, by 2030-2052 the global climate change will lead to 1.5 °C rise in temperature
The article deals with the issues of the influence of heat stress that occurs in the summer on the indicators characterizing the reproductive qualities
Purebred sows of tested Poltava meat breed of different genotypes were investigated: Group I - individuals-offspring obtained by the method of introductory crossing using the blood of early maturing meat breed, Group II - individuals obtained by the method of introductory crossing using the blood of the Finnish Landrace

Summary

Introduction

According to forecasts, by 2030-2052 the global climate change will lead to 1.5 °C rise in temperature. If it continues at the current pace, the number of hot days is projected to increase in most land regions [1]. It is predicted that the frequency, intensity and duration of heat waves will increase in the future [2]. Extreme temperature events caused by climate change can increase the risk of exceeding the body's thermoregulatory capacity [3]. All animals have a thermal comfort zone to maintain physiological functions. Under conditions when the temperature rise goes beyond the upper critical temperature range, animals begin to experience heat stress [4]

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