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Vlivy působící na kvalitativní a kvantitativní znaky spermatu kanců
KUČERA, Josef
The aim of the thesis was to evaluate the effects of boar´s genotype (breed or breed combination), season, age and artificial insemination centre on sperm volume, sperm concentration, motility percentage, percentage of abnormal spermatozoa and total number of spermatozoa per ejaculate. The data were collected in 2017 and 2018 from 17 794 collections from 504 boars, 6 to 101 month of age, 6 breeds and 5 breed combinations. The boars were bred in 8 artificial insemination centres in the Czech Republic. Each boar´s genotype produced average sperm volume, sperm volume grew up from spring to autumn and to 4 years of age. Sperm concentration was lower. There were a difference 27 ×103/mm3 (P<0.01) between spring and winter. Boars between 2 to3 years of age had higher sperm concentration (14 ×103/mm3 resp. 15.2 ×103/mm3) than boars less 1 year, resp. 2 to 3 years of age (P<0.01). Sperm motility was at good quality in all genotypes and artificial insemination centres, in all seasons and every age group. Total number of spermatozoa per ejaculate was lower for most genotypes, grew to 4 years of age, there were statistically significant differences between spring and autumn 9 bill.
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