The purpose of this thesis was to describe the transfer of genetic potential of sows in production sphere and evaluate concrete results in reproduction breeding sows Agricultural Society Kosova Hora. On large-scale farrowing sows were evaluated Doublovičky basic herd of sows, which consisted of 440 to 520 pieces. sows. The basic herd always has been about 35 nucleic sows (P 1065). The rest of the herd was an offspring of hybrids F1 (C 1023) program the PIC. The sows P 1065 were investigated causes selecting progeny namely: 1) For lack of development, which was evaluated from birth to breeding gilts adulthood. 2) The number and formation of the teats. For breeding were required to at least 12. They can not be crater, but well formed to have good piglets suck breast milk from them. 3) Reproduction in gilts were evaluated after conception periodic (cyclic) heat. The minimum requirement for the first 8 piglets which are born alive. For the basic herd was evaluated the age structure. It was incorporated into three groups and evaluated that, the largest selection of sows was for lack of milk production, limb injuries, poor breeding condition and the possibility of further embedding. The largest selection of sows takes place after the third to fifth lactation.

The evaluation of influence of parity on fatty acids content in milk fat of cows from selected farm and defining of difference between lactations were main topics of this thesis.

Milk fat is the recipient of numerous functions. It affects the biological, chemical, sensory and technological properties of milk. The Czech Republic is consumed and processed, especially cows, goats and ewes milk. The aim was to focus on the description of selected fatty acids in milk fat of dairy cows and goats because of their importance to human health and the factors that influence their composition. The results show that the content of short-chain fatty acids was compared to dairy cows higher in goat breeds. It was also found that the proportion of saturated fatty acids was influenced mainly breed and individuality, while the composition of unsaturated fatty acids was affected more nutrition and feeding. The work describes the biological factors such as breed, individuality, parity and stage of lactation, of the external factors described nutrition and feeding. Chapter biological factors mainly deals with the influence of genetics and contains a description of selected candidate genes affecting milk fat and fatty acids.

Milk production has been evaluated not only by genetic potential but there are also a lot of indicators. The potential milk production of the herd depends on the correct link between the genetic potential and the system of selection, feeding and nutrition, reproduction and the breeding environment and health of animals. The aim of the thesis was to produce a literary overview of milk production, milk composition and influences that can influence the composition of milk. For the selected herd to evaluate the effects on the monitored indicators of the milk composition and to statistically evaluate them. For discarded dairy cows to determine the age and reason of culling and lifelong milk production.