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Home » Archive » 2018

TDK conference 2018

Phenotyping of Hungarian Grey bulls with the optometric VATEM method
Beck Attila - year 5
University of Veterinary Medicine Budapest, Department Animal Breeding, Nutrition and Laboratory Animal Science
Supervisor: Dr. Ákos Maróti Agóts

Abstract:

The first time the body parameters of Hungarian Grey bulls were measured was back in 1968, with the assistance of the brave herdsmen of the time. Measuring the body parameters of extensively kept beef cattle with traditional methods is very dangerous, usually it is practically impossible. Since 2001 the body parameters of the Hungarian Grey cows have been measured several times, using the optometric VATEM method. However, a population-scale measurement of bulls has not taken place yet. We assessed the bulls in three Hungarian bull breeding centres: in Hortobágy, Apaj and Sarród, in 2016 and in 2017. Since 2015, besides the breeding bulls we have also been measuring the 2-year-old young bull population. For the video footages we have used cameras with HD and 4K resolution. The side camera was placed 15 metres, while the upper camera was placed 5 metres from the axis of the corridor. The measurement process was performed using the VATEM2 software (vatem.hu), while the statistical processing was performed using EXCEL and R. We have measured the following [body] parameters of breeding bulls older than 5 years (n=76) (cm, sd): wither height (138, 6.3), height of back (136, 6.8), rump height (137, 6.4), trunk length (169, 12.9), body length (164, 12.8), chest depth (80, 6.4), shoulder width (52, 5.4), rump1 (53, 6.1), rump3 (24,2.3), and rump length (43, 5.7). After a statistical analysis and a hierarchical selection we were able to identify bull types. Based on measurements, it was possible to distinguish between the two types of bulls. The two main types recognized are corresponding to, Zoltán Csukás's two Debrecen students, András Magyari and Géza Kerékgyártó, the types described in their study published in 1941. Primitive Type (cm, sd) wither height (136.9 ,5.4), trunk lenght (166.8, 10.81), depth of chest (76.,4 ,4.32). Farm type (cm, sd) wither height (140.9,5.54), trunk lenght (171.2 , 7.76), depth of chest (82.6,3.72).Remarkable that the 1941 Essay concludes that based on the kind of selective response, equal to the then most productive kind of production to those properties would be available.



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