Abstract
The article deals with the reproductive qualities of Large White breed sows of Hungarian origin and their operational value. We also determined they economic efficiency. The experimental part of the research was conducted in agricultural formations of Dnipro region (AALLC "Druzhba-Kaznachejivka", Ltd. "Vidrodzhennja") and livestock laboratories of the State establishment Institute of Grain Crops NAAS. Evaluation of sows on the main indicators of the level of adaptation and reproductive qualities was performed taking into account the following quantitative characteristics: life expectancy, months, duration of breeding use, farrowing was obtained, total piglets were obtained, heads, live piglets were obtained, heads, fertility of heads, nest masst at the time of weaning at the age of 28 days (kg), preservation (%), duration of between farrowing period, days, number of unproductive days per farrowing. It is defined that sows of Large White breed of the controlled herd on the main indicators of reproductive qualities (fertility, head; nest mass at the time of weaning at the age of 28 days, kg) meet the minimum requirements of class I and elite class. A significant difference between the groups of animals of the categories "high operational value" and “low operational value” was defined by indicators “life expectancy, months” (29.9 months, td = 13.71), ”duration of breeding use, months” (29.6 months, td = 14.50), "farrowings were obtained" (5.7 farrowings, td = 14.50), "total piglets were obtained, heads" (70.5, heads, td = 13.85), "obtained live piglets, heads" (67.7 heads, td = 20.83), "fertility, heads " (3.3 heads, td = 10.31), nest mass at the time of weaning at the age of 28 days (6.5 kg, td = 2.55). Coefficients of phenotypic consolidation of signs of reproductive qualities in sows of different operational value ranged from -0.785 to +0.856. The maximum supplement in additional products on the indicator “nest mass at the time of weaning at the age of 28 days, kg” was obtained from sows of the category "high operational value" - 6.03%.
Highlights
The number of sows from which 84-135 live piglets were obtained during the breeding period is 29.04%, 42-81 heads. - 43.54%, 7-39 heads. - 27.42%
We found that sows of the category “high operational value” dominated their peers of the opposite class “low operational value” in terms of life expectancy by 29.9 months., duration of breeding use - 29.6 months
The results of the researches show that sows of Large White breed of controlled herd for fertility and the mass of the nest at the time of weaning at the age of 28 days meet the minimum requirements of class I and elite class
Summary
The experience of specialists of agricultural formations, as well as researches of domestic and foreign scientists testify that the current issues of development of the pig industry, along with improving the conditions of feeding and keeping animals of different production groups, there is the introduction of objective methods for assessing the breeding value of repair young stock, sows and breeding boars of the main herd (DNA markers, BLUP method, evaluative and selective indices), selection of highly productive animals and their intensive use (Mikhaylova, 2017; Kabanov, 2009; Voloshchuk, 2014; Berezovsky & Vashchenko, 2015; Hryshyna & Fesenko, 2015; Rybalko, 2015; Gutyj et al, 2017; Kozyr et al, 2019; Martyshuk et al, 2020; Khalak et al, 2020). In connection with the intensive import of pigs of foreign selection to Ukraine, important factors in the formation of a highly productive herd of pigs are the research of the level of their adaptation and operational value This is confirmed by scientific developments of domestic and foreign scientists (Bazhov & Komlatskiy, 1989; Herasymov et al, 2003; Кodak, 2010; Usenko et al, 2019). The purpose of the work is to investigate the reproductive qualities of sows of Large White breed of different operational value, to calculate the coefficients of phenotypic consolidation of this group of signs and the economic efficiency of research results. To achieve this goal, the following tasks were provided:.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call