Dairy cattle breeding is still taking the first place of it‘s production. Growing requirements in the national and international markets require animals productivity, increase of genetic potential and development of production quality. The growth of animal’s genetic potential promote the use of bull’s sires with high value of breed. There are a lot of the bulls sires witch are improving the breed. So they constitute line of descent or related groups. The company „Litgenas“ during 14 work years has been used 11 line of descent and related groups. There are 4 the main line of descent and related groups: 1. W. A. BURKE LAD 697789 line ( 920 ); 2. R. O. R. A. ELEVATION 1491007 US1491007 related group ( 931 ); 3. O. IVANHOE 1189870 line ( 960 ); 4. P. F. ARLINDA CHIEF TL 1427381 related group ( 982 ). Comparing to the controlled cows’ bands of 2004-2005 years the supply of company coincides with the demand of market. I was using „R“ statistic analysis packet, counting arithmetic avarages of values of bulls breeds and coefficient of variation. Also during the communication with farmers I noticed that the requirements of bulls genealogy schemes which are used by the company „Litgenas“ became much bigger. So due to the information of bulls line of descent which were cumulated by the computation centre “VIC” of Lithuania I made bulls sires genealogy schemes. All farmers, selectioners of company, regions breeding inspectors and inseminators are using this poster. The... [to full text]