In the conditions of the Republic of Belarus there was realized the evaluation of genetic inheritance indexes of producing bulls at a cattle breeding enterprise in Belarus depending on a selection source (in accordance with an average productivity of female ancestors) in order to use them properly for the increasing of genetic potential of black-and-white Belarusian cows in Gomel region. The carried out analysis allowed to draw a conclusion, that bulls of national breeding lines according to the indexes of cow milk yields concede foreign bulls, i.e. delivered of Sweden on 2744 kg of milk or on 27,5% and from Russia and Hungary - on 1272-2906 kg of milk or 12,7-29,1% (Р less than 0,001). In accordance with butter-fat yielding capacity of bull mothers obtained at breeding farms of Belarus and in accordance with groups delivered from the other countries there were stated no essential distinctions (0,05). Butter-fat yielding capacity percentage of bull mothers varied within 3,99-4,10%. However, the yield of dairy fat per lactation the difference was in favour of bull mothers delivered from Sweden (114 kg or 27,9%) at P less than 0,001. Distinctions on milk producing ability of bull mothers from various cattle breeding enterprises of Belarus were revealed. It was established, that at mothers of bulls delivered from Hungary the variability of milk yield was the highest (3032 kg or 23%). Low variability indexes of milk yield and butter-fat yielding capacity percentage was typical for bull mothers of the Belarusian selection. The standard deviation at them made 872 kg of milk yield with 9% variability coefficient, and 0,03% - for butter-fat yield and 7% respectively. Variability on all indicators of dairy efficiency of bull mothers from various cattle breeding enterprises of Belarus in most of the cases was low - from 2,3 to 13%.

In the conditions of the Republic of Belarus as a result of task-specific selection and breeding work there was developed and approbated Berezinsky breed type of Belarusian meaty breed. Sows of the studied breed type were notable for high indices of reproductive signs: the average multiple pregnancy in three breeding swine herd was 11,1 pigs per farrowing; milkability - 55 kg, litter size at weaning stage at 35-day age - 87,1 kg. The predominancy over the forecast exponent indices made 4,7-5,7%. In course of the study there were analyzed the forecasted indexes of the basic breeding signs of Berezinsky breed type of Belarusian meaty breed for 2005-2010; productivity indices of the experimental sows; coefficient of variations of sow productivity.

The Republican Agricultural Breeding Unitary Enterprise Zarechje of the Republic of Belarus is the basic horse-breeding enterprise of Belarusian coach horse breeding. In the enterprise there are 27 mares and 2 studhorses; all animals are purebred. It is established, that unaltered male horses and mares belong to Belarus coaching breed, all pedigree animals have a high class: 15 horses belong to an elite class that makes 75% from all herd, 4 heads concern the first class (20%), and 1 head – to the second class (5%). Measurements surpass the standard that can prove the appropriate selection and breeding work in the enterprise. After studying the measurements of studhorses of the enterprise in comparison with the standard it was established, that the height at crest of stallions on the average exceeds the breed standard on 30%, slanting length of a trunk - on 5,0%, a breast grasp - on 4,0% and a metacarpus grasp - on 6%. For improvement of herd of horses it is necessary to organize correctly a coupling campaign with drawing up of the coupling plan and selection of a uterus to stallions; to use in copulation only the best elite stallion.