Vliv věku na hmotnost a výšku v kříži u jalovic českého strakatého plemene skotu

In this bachelor´s thesis, I observed the effect of an age on weight and height in the cross of heifers of Czech Fleckvieh cattle breed. This observation of population of 538 heifers took place in December 2014 at the farm in Pikárec. At this population weighing and measuring the height of the cross was done. The collected data was then processed, analyzed and used to evaluate the effect of an age on the monitored physical parameters of heifers. The part of the thesis also focuses on assessing the impact of the season at birth on weight and height in the cross. The obtained results show that heifers reach the ideal weight at the first insemination at the age of 13-14 months, which corresponds to the first calving in the age of 22-23 months. This parameter significantly exceeds the breeding objective of Czech Fleckvieh cattle breed and approximates a bit of parameters of breeding objective of Holstein cattle breed. This could significantly reduce the cost of breeding the heifers. It was also found that the reported average height in the cross significantly exceed the Rating methodology for growth and development of heifers of Czech Fleckvieh cattle breed released in 2000