791 ACTA UNIVERSITATIS AGRICULTURAE ET SILVICULTURAE MENDELIANAE BRUNENSIS Volume 64 90 Number 3, 2016 http://dx.doi.org/10.11118/actaun201664030791 DEVELOPMENT TO ENSURE OF THE RESULT RELIABILITY OF PRODUCTION INDICATORS IN THE MILK RECORDING DURING ITS COMPUTERIZATION Pavel Hering 1 , Pavel Kopunecz 2 , Oto Hanuš 1 , Martin Tomáška 3 , Marcela Klimešová 1 , Radoslava Jedelská 1 , Jaroslav Kopecký 1 1 Dairy Research Institute, Ltd., Ke Dvoru 12a, 160 00 Praha 6, Czech Republic 2 Czech-Moravian Breeders Corporation, Inc., Benešovská 123, 252 09 Hradištko, Czech Republic 3 Dairy Research Institute, JV, Dlhá 95, 010 01 Žilina, Slovak Republic Abstract HERING PAVEL , KOPUNECZ PAVEL , HANUŠ OTO, TOMÁŠKA MARTIN, KLIMEŠOVÁ MARCELA, JEDELSKÁ RADOSLAVA, KOPECKÝ JAROSLAV. 2016. Development to Ensure of the Result Reliability of Production Indicators in the Milk Recording During its Computerization. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 64(3): 791–801. Milk recording (MR) is an essential breeder measure. Results are important for inheritance check. The occurrence of errors in the data may compromise the efficiency of breeding of dairy cows. The aim was possibility to reduce the incidence of MR database errors. Analyses of frequency distribution of MR data deviations from different sources and estimations of limits of difference acceptability in milk recording were performed. The results of MR control days of flowmeter in parlor (DMY) were paired to the AVG7 results (average for 7 days) from the same flowmeter (n = 16,247, original recordings of complete lactations). The individual differences in milk yield indicators were calculated between successive MR control days (DMY – R, monthly interval, the reference value (R) = previous DMY) for MR data file. A statistically significant correlation coefficient (AVG7 and DMY) was 0.935 (P < 0.001) and was higher in comparison to the previous assessment under AMS conditions (automatic milking system; 0.898; P < 0.001). This means that 87.3% of the variability in the milk yield values for MR (DMY) can be explained by variations in the AVG7 values and vice versa. Difference tests confirmed significant differences (P < 0.001) 0.76 and 0.55 kg between DMY (in MR) and AVG7 for original and also refined data file. Mentioned differences, although statistically significant, correspond only to 2.96 and 2.15% relatively. The use of multi–day milk yield average from the electronic flowmeter is an equivalent alternative to the use of record from one MR control day. Results are used in MR practice. Keywords: cow, raw milk, milk yield, fat, protein, somatic cell count, milked cattle breeding INTRODUCTION Milk recording (MR) is an essential breeder measure (Hering et al., 2005). Its results are important to inheritance check. The error occurrence in the data may compromise the efficiency of breeding work about dairy cows. There are presently involved 93.9% of dairy cows (Kvapilík, Růžička and Bucek et al., 2014) in MR of the Czech Republic. The MR authorized through ICAR (International Committee for Animal Recording, 2008) is important for the recognition of international trade in breeding material. Therefore, the used partial methodological and technological procedures in MR must be validated for the possibility authorization of the MR whole. As stated by prof. Taufer (1869–1940; cit. Hering et al., 2005): “There are no cultivating actions without a yield control and any culture breed dies without genetic transmission control. Therefore the