Records of 100-day Fleckvieh lactation for yields of milk (M100), fat (F100), protein (P100)fat-plus-protein (FP100) and carrier (CIOC) were examined. Estimates of genetic and phenotypic variations and covariations were obtained for the first three lactations as well as for all lactations combined. A total of 26874 records representing 10466 cows sired by 650 bulls extracted from 50788 records were used. The sire of the cow affected significantly (P 0.73. All these estimates of TG and rp in the first lactation were greatly larger than those estimates of the second and third lactations. Part-lactation yield traits of the daughters evaluated gave an efficient guide for the evaluation of Fleckvieh bulls. The relative efficiency of progeny test based on part-lactation record was as efficient as that based on complete-lactation record. |
