INFLUENCE OF THE PERFORMANCE SELECTION ON THE MACROSCOPIC AND MICROSCOPIC TRAITS OF BOARS SEMEN FROM DIFFERENT ORIGIN

A. Apostolov, M. Bozhkova, T. Nikolova, K. Eneva

Abstract: The quality and quantity semen traits of 15 boars from three origins (Danube White, English Landrace x Pietren and [Danube White x (English Landrace x Pietren)] x Danish Landrace1) have been investigated. There were 538 ejaculates which have been object of macroscopic, microscopic analysis during the period 2012-2015. The traits volume of ejaculate, ml; density, mln/ml; and mobility of spermatozoa, % have been controlled. Significant random effects of individual genotype from the examined origins, regarding the reproductive and performance traits (P≤0.001) were established. The sperm quality and quantity is better during the autumn-winter period compared with the spring-summer period (P≤0.001). Favorable dependences between the fat thickness, growth intensity and lean meat percent with the sperm density were established.

Keywords: crosses; Danube white; reproductive and performance traits

Date published: 2017-03-16