Radka Vlaeva1, Nadejda Lukanova2, Stanimir Dimitrov3, Svetlana Georgieva3
1 Trakia University, Faculty of Agriculture, Department of Non-ruminant and Other Animals, 6000 Stara Zagora, Bulgaria
2 Agricultural Academy, Institute of Animal Science, 2232 Kostinbrod, Bulgaria
3 Trakia University, Faculty of Agriculture, Department of Genetics, Breeding and Reproduction, 6000 Stara Zagora, Bulgaria
Vlaeva, R., Lukanova, N., Dimitrov, S. & Georgieva, S. (2019). Reproductive parameters of Thoroughbred mares reared in the national stud farm “Kabiyuk” in Bulgaria. Bulg. J. Anim. Sci., 25 (Suppl. 3), 116–119
The reproductive parameters of 51 Thoroughbred mares were studied during the period 1997-2010. A total number of 270 oestrus and reproductive cycles were included in the analysis. Thoroughbred horses are only allowed to mate naturally by traditional hand method. As a source of information was used the zootechnical documentation of the national stud farm. It was established that the reproductive traits subject to the recent study varied in wide ranges - interval of foal heat (11.18±2.40-31.00±19.92 days) and foaling-to-conception (13.00±3.00-57.00±29.69 days), number of oestrus cycles (1.16±0.38-1.87±1.28), mating of mares (2.80±0.83-3.89±2.40) and total born foals (2-20) per year, duration of oestrus (21.00±2.51-26.00±7.07 days) and heat (3.00±2.22-5.09±1.95 days). The positive correlations were found between duration of oestrus cycle with number of matings per year and duration of heat, duration of heat and number of matings per year, foaling-to-conception interval with number of foals and foaling-to-conception interval and number of oestrus cycles per year.