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2017, vol. 33, iss. 2, pp. 151-159
Dependencies between some traits of sperm production of boars at different age
Agricultural University, Plovdiv, Bulgaria

emailivelina_z@abv.bg
Keywords: boars; semen traits; correlations; regression; age class
Abstract
The aim of the study was to establish correlation and regression dependencies between some traits of sperm production of terminal boars (Large White x Pietrain). The analyzed material consisted of 347 ejaculates, received in the period from 2011 to 2014. The boars were divided in three groups according to the age the ejaculate was obtained at (up to 12 months, from 12 to 24 months, and above 36 months). A moderate and negative correlation was established (rp=-0.34, p<0.001) between the volume of the ejaculate and the concentration of the sperms in the second age group. With the youngest boars we established poor and positive correlation (rp=0.29, p<0.05) between the volume of the semen and the motility of the sperm. The correlations between the traits concentration and motility are poor in the third (rp=0.18, p<0.05), and moderate in the second age group (rp=0.49, p<0.001). Between the motility from one side and the agglutinated and dead sperms from the other, they are within the range of rp =-0.46 to rp=-0.87, p<0.001. The correlations between the agglutinated and dead sperms are positive, from moderate to high and reliable (p<0.001) in all three age classes. The regression trend between the traits of sperm production are almost the same in all three age groups with the exception of volume of the ejaculate to the concentration of sperms.
References
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About

article language: English
document type: Original Scientific Paper
DOI: 10.2298/BAH1702151Z
published in SCIndeks: 07/12/2017
Creative Commons License 4.0

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