| Abstract: | Inbreeding was used in the regeneration process in the breeding of the Kladrub Black Horse. Inbreeding rate is realized in practice, as related to the manifestation of the selected characteristics of this unique horse population. The evaluation of the effect of inbreeding on conception rate and fertility did not demonstrate any differences between the group of inbred mares and non-inbred mares. The study was conducted in mares used for breeding for 10 years. The results provide evidence that inbreeding causes no depression in this characteristics in the Kladrub Black Horse which would otherwise be the first physiological function in the reproduction process to be altered as a result of inbreeding. The evaluation of the effect of inbreeding on growth rate by comparing it with the standard growth curves which were characterized by the exponential function y = A (1 -- e-k(t-to)) did not indicate any statistically significant differences in growth dynamics between foals with a zero Fx value and inbred foals. This study was based on the evaluation of growth rate in the basic body traits and weight. It is inferred that inbreeding does not reduce growth dynamics of different body measurements and weight. Similarly, the evaluation of the body dimensions and weight of inbred and non-inbred adults showed no significant differences. Similar results were obtained from the evaluation of the relation between inbreeding and body constitution, character, and temperament. All the correlation coefficients are very low, almost equal to zero. |
