Мonitoring of blood condition and sperm quality of breeding boars of different genotypes and efficiency of reproduction of the herd

Abstract

The biochemical composition of blood and semen of breeding boars of breeding enterprises of large white breed, Ukrainian meat, Kharkiv and Dnipropetrovsk selection was studied. Establishments that the average biochemical parameters of blood and semen of boars did not exceed the biological norm. The average number of sperm in the filtered boar ejaculate of the experimental genotypes was in the range of 42.441-54.648 billion, with an ejaculate size of 202.0 ± 6.3-248.4 ± 10.2 ml and a concentration of sperm moving in a straight line gradually 0.21 ± 0.003 -0.23 ± 0.01 billion Jr. There is a highly probable difference in the volume of filtered ejaculate between the offspring of the Ukrainian meat breed of Dnipropetrovsk and Kharkiv selections in favor of the former. The correlation coefficient between the pH of boar sperm of experimental genotypes and sperm concentration in 1 cm was -0.323 (large white breed) - 0.294 (Ukrainian meat breed of Kharkiv selection), - 0.208 (Ukrainian meat breed of Dnipropetrovsk selection). The level of representativeness of the calculated correlation coefficients between traits was in the range of P> 0.05- P <0.05. The average number of semen doses obtained from one ejaculate was 8.5 doses (meat breed of Kharkiv selection) and 10.9 doses of Ukrainian meat breed of Dnipropetrovsk selection (at the rate of 10.0 doses in boars of large white breed). Fertilization of uterine livestock from the first insemination, depending on the method of breeding was in the range of 62.5-83.1% at the level of reproductive capacity of sows 8.7 ± 0.18 - 11.7 ± 0.25 piglets per farrowing, which generally characterizes the quality of the uterine population in the ability to fertilize during one sexual cycle and the level of breeding in the herd direction of improvement of a trait with a low degree of its inheritance.