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Abstract. Body measurements of 110 beef cows of 9 breeds (Hungarian Simmental, Hereford, Aberdeen Angus, Red Angus, Lincoln Red, Shaver, Charolais, Limousin and Blonde d’Aquitaine) were taken in December 2004. The absolute, relative measurements and measurement indices moreover correlations between age, live weight and measurements were evaluated and compared for the mentioned breeds. Animals in study were born between 1989 and 2002, kept on the same condition on peat-bog soil pasture at Keszthely. Significant differences (P<0.05) were found among breeds in most of the body measurements. Blonde d’ Aquitaine was the heaviest in live weight (638 kg), highest as for the height at withers (142.5 cm), height at rump (146.6 cm) and length of the body (151.5 cm). Limousin had longest measurements as for the length of the rump (47.4 cm) and width of the rump (58.3 cm). Shaver had the longest width between shoulders (52.9 cm) and width of the head (25.1 cm) while Lincoln Red the longest length of the head (52.8 cm). The correlations between live weight and measurements were medium or strong positive (r = 0.40–0.83), between age and measurements slight positive (r = 0.01–0.46), among the different measurements medium or strong positive (r = 0.22–0.81).

The objective of this study was to estimate the effect of the thyroglobulin (TG) locus on beef quality traits in some beef cattle breeds and to investigate the effect of the DGAT1 locus on milk production traits in the Hungarian Holstein Friesian population. TG and DGAT1 genotypes were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) assay. At the TG locus TT bulls showed the highest fat percentage values in the longissimus dorsi muscle (m. longissimus dorsi); the difference between CC and TT genotypes was significant. DGAT1 GC/GC cows had the highest milk, fat and protein yield values. Due to the relatively small number of GC/GC cows the difference proved to be significant only between AA/AA and AA/GC genotypes.

Birth weight data of dromedary calves from the database of one of the world's largest dairy herds (Dubai, UAE) were analyzed for the period from 2007 to 2018. The assessment included the data of 4124 camel calves that were classified into six ecotypes (Emirate, Emirate crossed, Black, Pakistanian, Saudi-Sudanian, and Saudi crossed). The aim of the study was to describe the heritability of birth weight of calves and the breeding value of sires. Genetic parameters of birth weight were estimated by ANOVA model and two BLUP animal models as well. The mean value of the camel calves' birth weight was 34.75 ± 5.67 kg. The direct heritability of birth weight (h 2 d = 0.09 ± 0.04-0.11 ± 0.03) was rather low, so was the maternal heritability (h 2 m = 0.23 ± 0.10-0.50 ± 0.06). The maternal effect from environmental origin (c 2 = 0.23 ± 0.08) far exceeded the results previously calculated in cattle. There was no difference in reliability between BLUP1 and BLUP2 models, and both of them were more accurate than the ANOVA model. Based on the results of this study, we conclude that the birth weight of dromedary calves was more influenced by the dam's intrauterine rearing capacity and by the environment, management, and feeding of the pregnant female camels than the hereditary growth potential. Considerable differences were found among male dromedaries in their breeding values for the birth weight trait.

The aim of this study was to test accuracy of measurements done by Falco 100 (Pie Medical) ultrasonic equipment. 10 Angus, 10 Hungarian Simmental, 10 Limousin and 10 Charolais fattening bulls were measured at the feedlot just before slaughtering. Fat thickness at the rump (P8) and ribeye area (REA) were realized from each animal. After slaughtering, the data of slaughter and carcass weights were collected and carcasses were judged on the base of EUROP system. The database was examined by SPSS 9.0 for Windows. Average liveweight of Angus was 645 ± 41.5 kg, of Hungarian Simmental was 676 ± 41.8 kg, of Limousin was 655 ± 50.8 kg and of Charolais was 694 ± 42.3 kg at the measurement. REA measured with ultrasound was 102.9 ± 8.9 cm 2 , 102.7 ± 10.4 cm 2 , 111.2 ± 9.6 cm 2 and 106.4 ± 9.5 cm 2 , respectively. P8 was 1.05 ± 0.28 cm, 0.62 ± 0.13 cm, 0.62 ± 0.09 and 0.61 ± 0.18 cm, respectively. Correlation between ultrasonic and carcass REA in case of mentioned breeds was 0.74, 0.74, 0.94 and 0.80. Correlation between P8 and EUROP fat score was 0.51, 0.73, 0.56 and 0.28, respectively. Overall correlation between ultrasonic and carcass REA was 0.83 (P≤0.01), and between P8 and EUROP fat score was 0.69 (P≤0.01).Keywords: bulls, ultrasound, accuracy, ribeye area, fat thickness ZusammenfassungBeziehungen zwischen Ultraschallmessdaten der Rückenmuskelfläche und Rücken-fettdicke zu Schlachtergebnissen von Mastbullen (Kurzmitteilung) Das ZieI der Untersuchung war die Prüfung der Genauigkeit des Ultraschallgerätes Falco 100 (Pie Medical). Unmittelbar vor der Schlachtung von je 10 Mastbullen der Rassen Angus, Ungarisches Fleckvieh, Limousin und Charolais erfolgte die Ultraschallmessung der Rückenfettdicke (P8) sowie der Rückenmuskelfläche (REA). Nach der Schlachtung wurden die Schlachtausbeute, das Hälftengewicht, die EUROP Fleischigkeits-und Fettgewebeklasse sowie die am Schlachtkörper dem Ultraschall vergleichbaren Messdaten festgestellt und mit dem Programmpaket SPSS 9.0 für Windows ausgewertet.Zum Zeitpunkt der Messung und Schlachtung betrugen die Lebendgewichte der Bullen: Angus = 645 ± 41,5 kg, Ungarisches Fleckvieh = 676 ± 41,8 kg, Limousin = 655 ± 50,8 kg und Charolais = 694 ± 42,3 kg. ln der genannten Reihenfolge der Rassen wurden folgende Ultraschallmesswerte für die Rückenmuskelfläche 102,9 ± 8,9 cm 2 , 102,7 ± 10,4 cm 2 , 111,2 ± 9,6 cm 2 und 106,4 ± 9,5 cm 2 ermittelt bzw. für die Rückenfettdicke von 1,05 ± 0,28 cm,

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