Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 23 ISSUE 1
Written by Mykola KREMEZ, Mykola POVOD, Oleksandr MYKHALKO, Olena IZHBOLDINA, Anatoly KHOKHLOV, Oksana SHEVCHENKO, Anna FEDIAIEVA, Viktor YUKHNO, Vasyl KARIAKA, Liudmyla ZASUKHA

The object of the research was the study of the influence of the breed of pigs and methods of their breeding on the reproductive functions of sows. Manifestation of various forms of the effect of hybrid power during direct and reverse crossing of animals of these breeds, as well as the tightness and directionality of correlative relationships were studied. No significant difference was found in most parameters of reproductive capacity between Large White and Landrace sows of Irish origin for purebred breeding and crossing, except for individual piglet weight at weaning. The weight of one piglet at weaning was probably higher in purebred litters of the Landrace breed compared to other investigated genotypes. We found that the heterosis caused the advantages of crossbred litters over purebred litters in most traits of reproductive performance. But despite this, the mass of weaned piglets had an intermediate form of inheritance. It was established that there was a strong positive correlation between fertility indicators and litter weight of piglets at birth, as well as between the number of piglets in the nest at weaning and the weight of the litter of piglets at weaning, similarly as between the weight of the litter of piglets at birth and the number of piglets in the nest at weaning and the weight of the litter of piglets at weaning. A strong positive correlation was found between indicators of the number of piglets in the nest at weaning and their weight during this period, as well as between the individual weight of the piglet at weaning and the weight of the nest of piglets at the time of weaning. Between multifertility and the average weight of one piglet at weaning, an inverse moderate relationship was found, as well as between the indicator of survival of piglets before weaning and survival of piglets at the time of weaning. As a result of the research, it can be asserted that there is a medium-strength correlation between the weight of the litter of piglets at birth and their weight at weaning.

[Read full article] [Citation]