"Reliability of breeding value estimation of cows for average life-time milk production is modelled on the basis of animal model method. Only the first or the first three lactations are considered for prediction. The number of contemporaries within (HYS) herd-year-season (1 to 15), degree of relationship between contemporaries, number of half-sisters (10 to 100) and relationship with the father only or full relationship over 3 generations of abcestors are taken into account. Two levels of heritability arability are used (0.32 and 0.21). Within the herd variability changed with the increasing magnitude of HYS. With data on 3 lactations, and all other information available, it is possible to achieve the reliability of prediction of breeding value for the average of life-time production r? = 0.535. It is by 12% higher that with the first lactation only. Reliability increases if the contemporaries are not related. Realiability also increases with the increasing number of contemporaries within HYS. When rea" . "[DE91245E7BCA]" . . "Z(MZE-M02-99-02)" . "Expected reliability of cow's breeding value for average life-time milk production"@en . "679894" . . "Expected reliability of cow's breeding value for average life-time milk production"@en . "1212-1819" . . "P\u0159ibyl, Josef" . "RIV/00027014:_____/01:00005070!RIV/2003/MZE/M02003/N" . . "Czech Journal of Animal Science" . "breeding value; reliability; milk production; contemporary; half-sisters; animal model length of season"@en . . "0"^^ . . "0"^^ . "2"^^ . . "Expected reliability of cow's breeding value for average life-time milk production" . . "12 (2001)" . . . "Expected reliability of cow's breeding value for average life-time milk production" . "2"^^ . "P\u0159ibylov\u00E1, Jana" . . . "10"^^ . . . "CZ - \u010Cesk\u00E1 republika" . "523-532" . . . . "Reliability of breeding value estimation of cows for average life-time milk production is modelled on the basis of animal model method. Only the first or the first three lactations are considered for prediction. The number of contemporaries within (HYS) herd-year-season (1 to 15), degree of relationship between contemporaries, number of half-sisters (10 to 100) and relationship with the father only or full relationship over 3 generations of abcestors are taken into account. Two levels of heritability arability are used (0.32 and 0.21). Within the herd variability changed with the increasing magnitude of HYS. With data on 3 lactations, and all other information available, it is possible to achieve the reliability of prediction of breeding value for the average of life-time production r? = 0.535. It is by 12% higher that with the first lactation only. Reliability increases if the contemporaries are not related. Realiability also increases with the increasing number of contemporaries within HYS. When rea"@en . . . "46" . "RIV/00027014:_____/01:00005070" .