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• Additional data for the evaluation of coat colour varieties in the Hungarian Grey cattle

  44-47

  Andrea Radácsi

  Imre Bodó

  Béla Béri

  Views:

  144

  When preserving genetic resources, one of the most important tasks is to conserve as much of the given gene pool for the future generations as we can. Therefore, traits that have no economic value at the moment should also be conserved. The great variety of coat colours seen in the Hungarian Grey cattle form part of the world’s genetic heritage. In order to maintain the world’s genetic diversity, we have to maintain these varieties, as well. The different coat colour varieties were determined – in both sexes and in several age groups – with a Minolta Chromameter CR-410 in an objective way. We found that the rate of the three main coat colour varieties of calves: the light reddish, the reddish and the dark reddish were 26%, 52% and 22%, respectively. Statistically significant differences were found between the L*a*b* values of the reddish coat colour of the Hungarian Grey and the red coat colour of the Limousin calves. The rate of the crane, the grey and the light grey coat colour varieties were determined in the measured female groups. The L*a*b* values of the Hungarian Grey and Maremman bulls’ coat were compared and evaluated.

• Study of the rams’ jumping order

  59-62

  János Oláh

  Nóra Vass

  Szilvia Kusza

  János Posta

  Anna Pécsi

  Andrea Radácsi

  Attila Harcsa

  Gergely Gyimóthy

  András Kovács

  András Jávor

  Views:

  145

  The bevahiour of Babolna Tetra, Ile de France and Suffolk rams was studied at semen collection by artificial vagina. The sequence of rams coming out of the group to the place of semen collection and the number of jumpings needed to ejaculation were observed. It was investigated if there were changes in these characters at different occasions, and did they show connection to the body condition. The number of jumpings before ejaculation was different in the different breeds. Semen was taken at the first jump from 63% of the Suffolk, 56% of the Babolna Tetra and 55% of the Ile de France rams. There was no early ejaculation at the Ile de France, but it was common among the Suffolk rams. The greatest changes in the jumping order between different semen collections were observed in the Babolna Tetra breed. There was a medium correlation in the Suffolk breed between the jumping order and body condition in the autumn and spring, which was tight and significant in winter.

• Horn colour varieties of the Hungarian Grey cattle

  83-87

  Andrea Radácsi

  Imre Bodó

  Béla Béri

  Views:

  121

  The Hungarian Grey Cattle breed is a ‘success-story’ of the national genetic conservation work. Traits of the breed have been subjects of several research projects, although many relationships remained unclear. Our present research results were meant to call attention to a less emphasized trait of the breed: the different horn colour varieties. Research work was carried out in the Hungarian Grey stock of the Hortobágy Non-profit Company for Nature Conservation and Gene Preservation. Ratio of the three main horn colour varieties (white, ‘cardy’, green) were determined in the observed female, male and steer stocks. Our results showed no significant differences (P<0,05) in the distribution of the horn colour varieties of the female and bull stocks, and of the female and steer stocks. We found that on the basis of the ratio of white colour, four sub-categories can be distinguished within the ‘cardy’ colour variety. Results of the statistical analysis (P<0,05) confirmed that the colour of the horn and the ratio of the black part on the horn tip are two different traits. 

• Opportunities of utilization of real-time ultrasound technique in beef cattle breeding

  45-52

  Sándor Harangi

  Andrea Radácsi

  Béla Béri

  Views:

  139

  The goal of the authors was to evaluate the repeatability and  accuracy of real-time ultrasound technique under Hungarian conditions. Ribeye area was measured at first time on live animals, before the day of slaughtering with Falco 100 ultrasound equipment in Charolais fattening bulls. Ultrasound pictures were traced at two times by the same operator. After slaughtering, ribeye area (REA) was measured on the carcass by planimeter at the same anatomical point like ultrasound measurements. Statistical analysis was carried out to examine the relationship between carcass and ultrasound REA. After it, repeatabilty was established by comparing the ultrasound pictures twice.

• Horn and coat color varieties of the Hungarian grey cattle

  44-48

  Andrea Radácsi

  Imre Bodó

  Béla Béri

  Views:

  123

  Due to the intensification of agricultural production, genetic diversity has been reduced to a large extent. Presently, in the period of worldwide genetic conservation, we try to preserve as much of the gene pool of our valuable indigenous domestic animal breeds as we can. Therefore, traits that have no economic value at the moment should also be conserved. The different horn and coat colour varieties of Hungarian Grey Cattle are such valuable traits. Research has been done on the largest Hungarian Grey Cattle stock, at the Hortobágy Kht. Rates of the different horn and coat colour varieties were determined and relationships were analyzed between the above mentioned qualitative traits